diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/catch_clause_var_has_init.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/catch_clause_var_has_init.ets
new file mode 100644
index 0000000000000000000000000000000000000000..7a5b1b28d15983aaa66a881198d9cf75f94a383f
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/catch_clause_var_has_init.ets
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+try {
+    throw new Exception();
+} catch (e = 0) {
+    //Do something.
+}
+
+/* @@? 18:12 Error SyntaxError: Catch clause variable cannot have an initializer. */
+/* @@? 18:12 Error SyntaxError: Expected ')', got '='. */
+/* @@? 18:12 Error SyntaxError: Expected '{', got '='. */
+/* @@? 18:12 Error SyntaxError: Expected '{', got '='. */
+/* @@? 18:12 Error SyntaxError: Unexpected token '='. */
+/* @@? 18:15 Error SyntaxError: Unexpected token ')'. */
+/* @@? 18:15 Error SyntaxError: Unexpected token ')'. */
+/* @@? 18:15 Error SyntaxError: Unexpected token ')'. */
+/* @@? 31:1 Error SyntaxError: Expected '}', got 'eos'. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/default_undef_not_allowed.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/default_undef_not_allowed.ets
new file mode 100644
index 0000000000000000000000000000000000000000..3d2a8f5d68853e3045cdb135a6a2381339a2e24e
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/default_undef_not_allowed.ets
@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+function f2(a?: int = /* @@ label */44): void {}
+
+/* @@@ label Error SyntaxError: Not enable default value with default undefined. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/duplicated_modifier.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/duplicated_modifier.ets
new file mode 100644
index 0000000000000000000000000000000000000000..4c69efec0b9cb39a9d19e0b0aebe3e6ae849c5d2
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/duplicated_modifier.ets
@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+abstract /* @@ label */abstract class B {
+}
+
+/* @@@ label Error SyntaxError: Duplicated modifier is not allowed. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/extension_setter_wrong_param.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/extension_setter_wrong_param.ets
new file mode 100644
index 0000000000000000000000000000000000000000..ef9ca5d36f2a16d56782687825321364aa14945a
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/extension_setter_wrong_param.ets
@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+class A{
+    field_: int;
+}
+
+/* @@ label */set field(this: A, a: int, b: int) {
+
+}
+
+/* @@@ label Error SyntaxError: Extension Setter can only have 2 parameters. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/for_in_loop_has_init.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/for_in_loop_has_init.ets
new file mode 100644
index 0000000000000000000000000000000000000000..84ec416e04acbb0800353546879834150e93bafb
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/for_in_loop_has_init.ets
@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+for (let i = 1 /* @@ label */of [0, 1, 2]) {}
+
+/* @@@ label Error SyntaxError: for-of loop variable declaration may not have an initializer. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/identifier_expected.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/identifier_expected.ets
new file mode 100644
index 0000000000000000000000000000000000000000..0f80ede9948b2bb63a70d553ffc217d5469a7ad0
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/identifier_expected.ets
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+function f1(a: int, ...b: int[] = /* @@ label */47/* @@ label1 */) {
+}
+
+/* @@@ label Error SyntaxError: Rest parameter cannot have the default value. */
+/* @@@ label1 Error SyntaxError: Identifier is needed here. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/illegal_use_strict.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/illegal_use_strict.ets
new file mode 100644
index 0000000000000000000000000000000000000000..f0be055b3eee20c456b39424d789d3f2c59313a0
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/illegal_use_strict.ets
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+function f(x: number, ... args: number[]) {
+    /* @@ label */"use strict"
+}
+
+/* @@@ label Error SyntaxError: Illegal 'use strict' directive in function with non-simple parameter list. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/implements_clause_empty.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/implements_clause_empty.ets
new file mode 100644
index 0000000000000000000000000000000000000000..7b59264af71a10bd6445cfd19e101a90c833c0aa
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/implements_clause_empty.ets
@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+class A implements /* @@ label */{}
+
+/* @@@ label Error SyntaxError: Implements clause can not be empty. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/implicit_octal_literal_not_allowed.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/implicit_octal_literal_not_allowed.ets
new file mode 100644
index 0000000000000000000000000000000000000000..e3ef93cc2f8c0abd5703e2766bfe3d18266699a9
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/implicit_octal_literal_not_allowed.ets
@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const n2 = 0134
+
+/* @@? 16:12 Error SyntaxError: Implicit octal literal not allowed. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/initializers_interface_props.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/initializers_interface_props.ets
new file mode 100644
index 0000000000000000000000000000000000000000..f645ec780d5aef1252a2fbe500925ed96f7c216c
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/initializers_interface_props.ets
@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+interface A {
+   readonly filed: number /* @@ label */== /* @@ label1 */1/* @@ label2 */;
+}
+
+/* @@@ label Error SyntaxError: Initializers are not allowed on interface properties. */
+/* @@@ label1 Error SyntaxError: Unexpected token, expected ','. */
+/* @@@ label1 Error SyntaxError: Unexpected token, expected 'private' or identifier. */
+/* @@@ label2 Error SyntaxError: Identifier expected. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/insert_node_absent.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/insert_node_absent.ets
new file mode 100644
index 0000000000000000000000000000000000000000..4d265db7678ec5eac0a0ca52c9350430ffcd0c77
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/insert_node_absent.ets
@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+let /* @@ label */@@/* @@ label1 */I2
+
+/* @@@ label Error SyntaxError: There is no any node to insert at the placeholder position. */
+/* @@@ label Error SyntaxError: Identifier expected, got '@@'. */
+/* @@@ label1 Error SyntaxError: Variable must be initialized or it's type must be declared. */
+/* @@@ label1 Error SyntaxError: Variable must be initialized or it's type must be declared. */
+/* @@@ label1 Error SyntaxError: Unexpected token 'I2'. */
+/* @@@ label1 Error TypeError: Unresolved reference I2  */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_bigInt_number.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_bigInt_number.ets
new file mode 100644
index 0000000000000000000000000000000000000000..8e466348ea32cb1d3ad78d56e8ea6a62a8f8fcba
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_bigInt_number.ets
@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+0x291n
+
+/* @@? 16:1 Error SyntaxError: Invalid BigInt number. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_character.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_character.ets
new file mode 100644
index 0000000000000000000000000000000000000000..c2392d48d111004115802b3718cea9e0302b69b5
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_character.ets
@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+\U4444
+
+/* @@? 16:1 Error SyntaxError: Invalid character. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_digit.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_digit.ets
new file mode 100644
index 0000000000000000000000000000000000000000..bd28141a871b35165ac0bbacb1a1f38cf6d7d4d9
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_digit.ets
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const badBin = 0bF0011101
+
+/* @@? 16:16 Error SyntaxError: Invalid digit. */
+/* @@? 16:18 Error SyntaxError: Unexpected token 'F0011101'. */
+/* @@? 16:18 Error TypeError: Unresolved reference F0011101 */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_end_numeric_separators.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_end_numeric_separators.ets
new file mode 100644
index 0000000000000000000000000000000000000000..d885c4b2f61a5b18dc25944750a5c37570363513
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_end_numeric_separators.ets
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+0o251042_
+
+/* @@? 16:1 Error SyntaxError: Numeric separators are not allowed at the end of numeric literals. */
+/* @@? 16:9 Error SyntaxError: Unexpected token '_'. */
+/* @@? 16:9 Error TypeError: Unresolved reference _ */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_identifier_part.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_identifier_part.ets
new file mode 100644
index 0000000000000000000000000000000000000000..053437bd52f84f8d1230f454bace5e2d2ecfa6a2
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_identifier_part.ets
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+undef\u0xFF00ned
+
+/* @@? 16:1 Error SyntaxError: Invalid Unicode escape. */
+/* @@? 16:1 Error SyntaxError: Invalid identifier part. */
+/* @@? 16:1 Error TypeError: Unresolved reference undefFF00ned */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_left_in_prefix.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_left_in_prefix.ets
new file mode 100644
index 0000000000000000000000000000000000000000..ebcb9d578fa72cb7e45c6f63577dc0b13d76a9da
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_left_in_prefix.ets
@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+--58
+
+/* @@? 19:1 Error SyntaxError: Invalid left-hand side in prefix operation. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_left_site_operator.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_left_site_operator.ets
new file mode 100644
index 0000000000000000000000000000000000000000..b6ad5986a6008050916fb66b17447a817097773b
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_left_site_operator.ets
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+function f4() {
+    69/* @@ label */++
+}
+
+/* @@@ label Error SyntaxError: Invalid left-hand side operator. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_numeric_literal.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_numeric_literal.ets
new file mode 100644
index 0000000000000000000000000000000000000000..7c896865fd6d2475a88c853fcf68ee1a91876c27
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_numeric_literal.ets
@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const f1 = 1.00000000f1
+
+/* @@? 16:12 Error SyntaxError: Invalid numeric literal. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_numeric_separator.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_numeric_separator.ets
new file mode 100644
index 0000000000000000000000000000000000000000..8e116eb766477285ee4bddc1dcc4de51a32a0979
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_numeric_separator.ets
@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* @@ label */0x0D00__0000
+
+/* @@@ label Error SyntaxError: Invalid numeric separator. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_octal_decimal_integer_literal.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_octal_decimal_integer_literal.ets
new file mode 100644
index 0000000000000000000000000000000000000000..18a234867f6db0aaa64a212fd36b3e2718a6c5d6
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_octal_decimal_integer_literal.ets
@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const n2 = /* @@ label */0999
+
+/* @@@ label Error SyntaxError: NonOctalDecimalIntegerLiteral is not enabled in strict mode code. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_octal_digit.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_octal_digit.ets
new file mode 100644
index 0000000000000000000000000000000000000000..cb4f84dfca9db85e7dd0db6eae37de0b7ffa5cce
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_octal_digit.ets
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const o1 = /* @@ label */0o0008
+
+/* @@@ label Error SyntaxError: Invalid octal digit. */
+/* @@@ label Error SyntaxError: Invalid numeric literal. */
+/* @@? 16:31 Error SyntaxError: Unexpected token '8'. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_unicode_escape_sequence.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_unicode_escape_sequence.ets
new file mode 100644
index 0000000000000000000000000000000000000000..9f6fdb1da821b782cb82eea31f6888784b9536cb
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_unicode_escape_sequence.ets
@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* @@ label */"\u{0x0096}"
+
+/* @@@ label Error SyntaxError: Invalid Unicode escape. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_union_type.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_union_type.ets
new file mode 100644
index 0000000000000000000000000000000000000000..7e012dde996d4b3fbddd4b21f0be18d8a9028c4a
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/invalid_union_type.ets
@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+type A = undefined | null | int
+/* @@ label */new A()
+
+/* @@@ label Error TypeError: The union type is not constructible. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/label_already_declared.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/label_already_declared.ets
new file mode 100644
index 0000000000000000000000000000000000000000..5637c2cb74b6631926423e30c2de386412f246a2
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/label_already_declared.ets
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+function f(x: int): void {
+    for (let i = 0; i < x; ++i) {
+        aa:
+            while (i < 10) {
+                /* @@ label */aa:
+                    while (i > 10) {
+                        ++i
+                        break aa
+                    }
+                ++i
+            }
+    }
+}
+
+/* @@@ label Error SyntaxError: Label already declared. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/multiple_default.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/multiple_default.ets
new file mode 100644
index 0000000000000000000000000000000000000000..c5238645f17d08df486a94111fc800bd9d9e438a
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/multiple_default.ets
@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+function g(x: int): int {
+    switch (x) {
+        case 1: return 0;
+        default: return -1;
+        /* @@ label */default: return -2;
+    }
+}
+
+/* @@@ label Error SyntaxError: Multiple default clauses. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/native_flag_only_for_top_fun.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/native_flag_only_for_top_fun.ets
new file mode 100644
index 0000000000000000000000000000000000000000..22854ecb34d9bcdfe6030c4d673c66a98b1073f1
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/native_flag_only_for_top_fun.ets
@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+native /* @@ label */class /* @@ label1 */Z /* @@ label2 */{/* @@ label3 */}
+
+/* @@@ label Error SyntaxError: 'native' flags must be used for functions only at top-level. */
+/* @@@ label1 Error TypeError: Native and Declare methods should have explicit return type. */
+/* @@@ label2 Error SyntaxError: Unexpected token, expected '('. */
+/* @@@ label3 Error SyntaxError: Unexpected token, expected an identifier. */
+/* @@@ label3 Error SyntaxError: Parameter declaration should have an explicit type annotation. */
+/* @@@ label3 Error SyntaxError: Unexpected token, expected ',' or ')'. */
+/* @@@ label3 Error SyntaxError: Unexpected token '}'. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/number_is_too_large.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/number_is_too_large.ets
new file mode 100644
index 0000000000000000000000000000000000000000..80a0bed4897bb1717552dad80f8c730192fe0ff0
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/number_is_too_large.ets
@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const n4 = /* @@ label */0xFFFFFFFFFFFFFFFF0
+
+/* @@@ label Error SyntaxError: Number is too large. */
+/* @@? 16:44 Error SyntaxError:  Unexpected token '0'. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/numeric_separator_start_with_zero.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/numeric_separator_start_with_zero.ets
new file mode 100644
index 0000000000000000000000000000000000000000..7fd6a07cec50ef31ecad013b8d94a2cac4e13005
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/numeric_separator_start_with_zero.ets
@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const n3 = /* @@ label */0_01
+
+/* @@@ label Error SyntaxError: Numeric separator '_' is not allowed in numbers that start with '0'. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/only_array_for_rest.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/only_array_for_rest.ets
new file mode 100644
index 0000000000000000000000000000000000000000..291e5944a84dbfce88d20bf954f9e526d2c691f7
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/only_array_for_rest.ets
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+function foo(...p: Object/* @@ label */): Object {
+    return new Object();
+}
+
+/* @@@ label Error SyntaxError: Rest parameter should be either array or tuple type. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/return_in_fun_body.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/return_in_fun_body.ets
new file mode 100644
index 0000000000000000000000000000000000000000..1e6352e1964629923338e081988bd9da1b1231da
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/return_in_fun_body.ets
@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* @@ label */return /* @@ label1 */48;
+
+/* @@@ label Error SyntaxError: return keyword should be used in function body. */
+/* @@@ label1 Error TypeError: All return statements in the function should be empty or have a value. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/special_predefined_method_cannot_be_async.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/special_predefined_method_cannot_be_async.ets
new file mode 100644
index 0000000000000000000000000000000000000000..cc2f2f12abe0beb00ef8244fb1a4f5f4b7a257fe
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/special_predefined_method_cannot_be_async.ets
@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+abstract class B {
+    /* @@ label */async $_get(a: int): Promise<int> {
+        return 5;
+    }
+}
+
+/* @@@ label Error SyntaxError: The special predefined method '$_get' cannot be asynchronous. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/special_predefined_method_should_have_one_param.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/special_predefined_method_should_have_one_param.ets
new file mode 100644
index 0000000000000000000000000000000000000000..9faf2196ec8a22ce171eed6b5db6db7b9ddb333b
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/special_predefined_method_should_have_one_param.ets
@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+abstract class B {
+    /* @@ label */$_get(): int {
+        return 5;
+    }
+}
+
+/* @@@ label Error SyntaxError: The special predefined method '$_get' should have exactly one required parameter. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/special_predefined_method_should_have_two_params.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/special_predefined_method_should_have_two_params.ets
new file mode 100644
index 0000000000000000000000000000000000000000..ce818cbf8fccdfcea74c786fbeddd8a3b8c105e5
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/special_predefined_method_should_have_two_params.ets
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+abstract class B {
+    /* @@ label */$_set(): void {}
+}
+
+/* @@@ label Error SyntaxError: The special predefined method '$_set' should have exactly two required parameter. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/special_predefined_method_should_not_have_params.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/special_predefined_method_should_not_have_params.ets
new file mode 100644
index 0000000000000000000000000000000000000000..72cc6e625ab025d167974ae0c3d40030f2b1e828
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/special_predefined_method_should_not_have_params.ets
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+abstract class B {
+    /* @@ label */abstract $_iterator<T>(a: int): Iterator<T>
+}
+
+/* @@@ label Error SyntaxError: The special predefined method '$_iterator' should not have parameters. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/unexpected_super.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/unexpected_super.ets
new file mode 100644
index 0000000000000000000000000000000000000000..962c5a4e4449fea934f3884791cf628dd8dc7b29
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/unexpected_super.ets
@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* @@ label */super/* @@ label1 */()
+
+/* @@@ label Error TypeError: Call to 'super' must be first statement in constructor */
+/* @@@ label1 Error SyntaxError: Unexpected super keyword. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/unsupported_character_literal.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/unsupported_character_literal.ets
new file mode 100644
index 0000000000000000000000000000000000000000..863e9aa4434b7bc4e615c584abc9ab74e59cbb38
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/unsupported_character_literal.ets
@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const c2 = /* @@ label */c'😀'
+
+/* @@@ label Error SyntaxError: Unsupported character literal. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/syntax/unterminated_string.ets b/ets2panda/test/ast/compiler/ets/errors/syntax/unterminated_string.ets
new file mode 100644
index 0000000000000000000000000000000000000000..d806127547b37038cc3a9af978b41f7575080cfd
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/syntax/unterminated_string.ets
@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+let expr = "test";
+`string ${expr
+
+/* @@? 23:1 Error SyntaxError: Expected '}', got 'eos'. */
+/* @@? 23:1 Error SyntaxError: Unterminated string. */
+/* @@? 23:1 Error SyntaxError: Unexpected token, expected '${' or '`' */
+/* @@? 23:1 Error SyntaxError: Unexpected token, expected '`'. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/type/abstract_in_concrete.ets b/ets2panda/test/ast/compiler/ets/errors/type/abstract_in_concrete.ets
new file mode 100644
index 0000000000000000000000000000000000000000..225b5e23718b2bf49dd24933ca697021e44acc14
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/type/abstract_in_concrete.ets
@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+class A /* @@ label */{
+    /* @@ label1 */abstract foo();
+}
+
+/* @@@ label Error TypeError: A is not abstract and does not override abstract method foo(): void in A */
+/* @@@ label1 Error TypeError: Non abstract class has abstract method. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/type/abstract_instantiation.ets b/ets2panda/test/ast/compiler/ets/errors/type/abstract_instantiation.ets
new file mode 100644
index 0000000000000000000000000000000000000000..afad3f8848d536cccc4203bed26e10d336f768da
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/type/abstract_instantiation.ets
@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+abstract class AbstractLocalClass{
+    method1(){}
+}
+let a:AbstractLocalClass = /* @@ label */new AbstractLocalClass();
+
+/* @@@ label Error TypeError: AbstractLocalClass is abstract therefore cannot be instantiated. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/type/abstract_is_final.ets b/ets2panda/test/ast/compiler/ets/errors/type/abstract_is_final.ets
new file mode 100644
index 0000000000000000000000000000000000000000..0213d29343933143d1a33a0f5006c36842406b04
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/type/abstract_is_final.ets
@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+class A_class{
+    foo(){
+        abstract final class AbstractFinalLocalClass/* @@ label */{}
+    }
+}
+
+/* @@@ label Error TypeError: Cannot use both 'final' and 'abstract' modifiers. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/type/ambient_const_invalid_lit.ets b/ets2panda/test/ast/compiler/ets/errors/type/ambient_const_invalid_lit.ets
new file mode 100644
index 0000000000000000000000000000000000000000..943a1a72d7117ba4250d5a0f9003375021544d11
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/type/ambient_const_invalid_lit.ets
@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+export declare const int_1 = /* @@ label */1 + 2 + 3 + 4
+
+/* @@@ label Error TypeError: A 'const' initializer in an ambient context must be a string or numeric literal: int_1 */
diff --git a/ets2panda/test/ast/compiler/ets/errors/type/assert_not_logical.ets b/ets2panda/test/ast/compiler/ets/errors/type/assert_not_logical.ets
new file mode 100644
index 0000000000000000000000000000000000000000..a56bb6730a4bcf4785bd3bab4db7ef681bb71d14
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/type/assert_not_logical.ets
@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+!
+
+/* @@? 20:1 Error SyntaxError: Unexpected token 'eos'. */
+/* @@? 20:1 Error TypeError: Bad operand type, the type of the operand must be boolean type. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/type/assignment_invalid_lhs.ets b/ets2panda/test/ast/compiler/ets/errors/type/assignment_invalid_lhs.ets
new file mode 100644
index 0000000000000000000000000000000000000000..9f30b4e7d15542d8e1ad0372d8d5d3af9ce18148
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/type/assignment_invalid_lhs.ets
@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+function foo() {
+    /* @@ label */55 /* @@ label1 */= int;
+}
+
+/* @@@ label Error TypeError: Invalid left-hand side of assignment expression */
+/* @@@ label1 Error SyntaxError: Invalid left-hand side in assignment expression. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/type/binop_union.ets b/ets2panda/test/ast/compiler/ets/errors/type/binop_union.ets
new file mode 100644
index 0000000000000000000000000000000000000000..b9fbd78c3c90b5dbbf0afad49859f61db998f845
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/type/binop_union.ets
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+class Cat {
+    name: string = 'cat';
+}
+
+class Dog {
+    name: string = 'dog';
+}
+
+type Animal = Cat | Dog | number;
+
+let cat: Animal = new Cat();
+let dog: Animal = new Dog();
+cat < dog;
+cat & dog;
+cat << 2;
+
+/* @@? 28:1 Error TypeError: Bad operand type, unions are not allowed in binary expressions except equality. */
+/* @@? 29:1 Error TypeError: Bad operand type, unions are not allowed in binary expressions except equality. */
+/* @@? 30:1 Error TypeError: Bad operand type, unions are not allowed in binary expressions except equality. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/type/infer_failure_func_param.ets b/ets2panda/test/ast/compiler/ets/errors/type/infer_failure_func_param.ets
new file mode 100644
index 0000000000000000000000000000000000000000..bc13add92695138f5f581a50c43e6f82c1a66f9f
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/type/infer_failure_func_param.ets
@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+function f(/* @@ label */a/* @@ label1 */): void {}
+
+/* @@@ label Error TypeError: The type of parameter 'a' cannot be inferred */
+/* @@@ label1 Error SyntaxError: Parameter declaration should have an explicit type annotation. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/type/invalid_enums.ets b/ets2panda/test/ast/compiler/ets/errors/type/invalid_enums.ets
new file mode 100644
index 0000000000000000000000000000000000000000..3e930b55fa0eeb52c806fb470b3811a862ec700e
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/type/invalid_enums.ets
@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+enum EStrNotInit {
+    Str1 = "str1",
+    Str2
+}
+
+/* @@? 18:9 Error SyntaxError: All items of string-type enumeration should be explicitly initialized. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/type/mixed_void_nonvoid.ets b/ets2panda/test/ast/compiler/ets/errors/type/mixed_void_nonvoid.ets
new file mode 100644
index 0000000000000000000000000000000000000000..1e6352e1964629923338e081988bd9da1b1231da
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/type/mixed_void_nonvoid.ets
@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* @@ label */return /* @@ label1 */48;
+
+/* @@@ label Error SyntaxError: return keyword should be used in function body. */
+/* @@@ label1 Error TypeError: All return statements in the function should be empty or have a value. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/type/multiple_spreads.ets b/ets2panda/test/ast/compiler/ets/errors/type/multiple_spreads.ets
new file mode 100644
index 0000000000000000000000000000000000000000..3860e66de592afefe2e8b5894f35077b70e91362
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/type/multiple_spreads.ets
@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+function foo(...numbers: number[]): number {
+  return numbers[0]
+}
+let a = [0,1,2]
+/* @@ label */foo(a[0], a[1], /* @@ label1 */...a)
+
+/* @@@ label Error TypeError: No matching call signature for foo(double, double, double) */
+/* @@@ label1 Error TypeError: Spread argument for the rest parameter can be only one. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/type/not_generic.ets b/ets2panda/test/ast/compiler/ets/errors/type/not_generic.ets
new file mode 100644
index 0000000000000000000000000000000000000000..6d52da0ac4fec60a2160f780cd4f31a8d9dc3e6e
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/type/not_generic.ets
@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+let entry: /* @@ label */Int<Double> = new Int();
+
+/* @@@ label Error TypeError: Type 'Int' is not generic. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/type/not_interface.ets b/ets2panda/test/ast/compiler/ets/errors/type/not_interface.ets
new file mode 100644
index 0000000000000000000000000000000000000000..e5ad29b7566e012d59db9fb90c4ecf1a61df3a31
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/type/not_interface.ets
@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+namespace MySpace {
+    let a:string = "1"
+}
+
+class B implements /* @@ label */MySpace{}
+
+/* @@@ label Error TypeError: Namespace 'MySpace' cannot be used as a type. */
+/* @@@ label Error TypeError: Interface expected here. */
diff --git a/ets2panda/test/ast/compiler/ets/errors/type/switch_case_invalid_type.ets b/ets2panda/test/ast/compiler/ets/errors/type/switch_case_invalid_type.ets
new file mode 100644
index 0000000000000000000000000000000000000000..27a58739aabd2efc6178e2803569dd06aee00366
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/type/switch_case_invalid_type.ets
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+function with_param(fn: () => int): void {
+    fn()
+}
+
+function main(): void {
+    const switch_arg = 2
+    const aa = 1.0;
+    with_param() {
+        switch (switch_arg) {
+            /* @@ label */case aa:
+                break
+            case 2:
+                break
+            default: assertTrue(false, "Not expected execution here");
+        }
+        return 0;
+    }
+}
+
+/* @@@ label Error TypeError: Unexpected type double */
diff --git a/ets2panda/test/ast/compiler/ets/errors/type/template_count_mismatch.ets b/ets2panda/test/ast/compiler/ets/errors/type/template_count_mismatch.ets
new file mode 100644
index 0000000000000000000000000000000000000000..4794212cce1de548db14d0bb77d2122ae58f9eef
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/errors/type/template_count_mismatch.ets
@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const o = /* @@ label */`\251`
+
+/* @@@ label Error TypeError: Invalid string template expression */
+/* @@@ label Error SyntaxError: Invalid character escape sequence. */
+/* @@? 16:26 Error SyntaxError: Invalid character escape sequence. */
+/* @@? 16:26 Error SyntaxError: Octal escape sequences are not allowed in template strings. */