diff --git a/src/bin/jbc2mpl b/src/bin/jbc2mpl
index f90bee432eb5403cfa699018ac060b63ca18c677..745812e6c888ca39ac100e8c22bacd394ce67803 100755
Binary files a/src/bin/jbc2mpl and b/src/bin/jbc2mpl differ
diff --git a/src/bin/maple b/src/bin/maple
index 2048892b27c40933dc00dae2d23e60ce6fe3e121..5a8f245b538c63a13b2d8719b4a97853b6bf9c75 100755
Binary files a/src/bin/maple and b/src/bin/maple differ
diff --git a/src/deplibs/libmplutil.a b/src/deplibs/libmplutil.a
index f36e3829ab84c2e3c849fef9a2ac5e41633f2e64..616bd74788991ca6745a376b51ddd5676bee9818 100644
Binary files a/src/deplibs/libmplutil.a and b/src/deplibs/libmplutil.a differ
diff --git a/src/maple_ipa/include/callgraph.h b/src/maple_ipa/include/callgraph.h
index 2824957c0b383297d8558d431b6c8da4a24e3316..c963a836fd5decb074968756eb42eb2e74b9666d 100644
--- a/src/maple_ipa/include/callgraph.h
+++ b/src/maple_ipa/include/callgraph.h
@@ -170,7 +170,7 @@ class CGNode {
     return vcallCands;
   }
 
-  /* add caller to CGNode */
+  // add caller to CGNode
   void AddCaller(CGNode *caller) {
     callerSet.insert(caller);
   }
@@ -408,7 +408,7 @@ class CallGraph : public AnalysisResult {
     return mirModule->IsInIPA();
   }
 
-  /* iterator */
+  // iterator
   using iterator = MapleMap<MIRFunction*, CGNode*>::iterator;
   iterator Begin() {
     return nodesMap.begin();
@@ -446,11 +446,11 @@ class CallGraph : public AnalysisResult {
   MIRBuilder *mirBuilder;
   CGNode *entryNode;  // For main function, nullptr if there is multiple entries
   MapleVector<CGNode*> rootNodes;
-  std::string fileName; /* used for output dot file */
+  std::string fileName; // used for output dot file
   KlassHierarchy *klassh;
   MapleMap<MIRFunction*, CGNode*, NodeComparator> nodesMap;
   MapleVector<SCCNode*> sccTopologicalVec;
-  CGNode *callExternal = nullptr; /* Auxiliary node used in icall/intrinsic call */
+  CGNode *callExternal = nullptr; // Auxiliary node used in icall/intrinsic call
   uint32 numOfNodes;
   uint32 numOfSccs;
   std::unordered_set<uint64> callsiteHash;
diff --git a/src/maple_ipa/src/callgraph.cpp b/src/maple_ipa/src/callgraph.cpp
index 752e33a5697bff3c8e48f071999e860c2769b9b6..0ed22ff54fc6ac680cb33594e96a6591203ac117 100644
--- a/src/maple_ipa/src/callgraph.cpp
+++ b/src/maple_ipa/src/callgraph.cpp
@@ -582,7 +582,7 @@ void CallGraph::AddCallGraphNode(MIRFunction &func) {
   CHECK_FATAL(node != nullptr, "node is null in CallGraph::GenCallGraph");
   BlockNode *body = func.GetBody();
   HandleBody(func, *body, *node, 0);
-  /* set root if current function is static main */
+  // set root if current function is static main
   if (func.GetName() == mirModule->GetEntryFuncName()) {
     mirModule->SetEntryFunction(&func);
     entryNode = node;
@@ -1428,13 +1428,14 @@ bool SCCNode::HasSelfRecursion() const {
 }
 
 void SCCNode::Dump() const {
-  printf("SCC %d contains\n", id);
+  LogInfo::MapleLogger() << "SCC " << id << " contains\n";
   for (auto const kIt : cgNodes) {
     CGNode *node = kIt;
     if (node->GetMIRFunction()) {
-      printf("  function(%d): %s\n", node->GetMIRFunction()->GetPuidx(), node->GetMIRFunction()->GetName().c_str());
+      LogInfo::MapleLogger() << "  function(" << node->GetMIRFunction()->GetPuidx() << "): " <<
+          node->GetMIRFunction()->GetName() << "\n";
     } else {
-      printf("  function: external\n");
+      LogInfo::MapleLogger() << "  function: external\n";
     }
   }
 }
@@ -1641,7 +1642,7 @@ void CallGraph::SCCTopologicalSort(const std::vector<SCCNode*> &sccNodes) {
 }
 
 void CGNode::AddCandsForCallNode(const KlassHierarchy &kh) {
-  /* already set vcall candidates information */
+  // already set vcall candidates information
   if (HasSetVCallCandidates()) {
     return;
   }
@@ -1662,7 +1663,7 @@ MIRFunction *CGNode::HasOneCandidate() const {
     ++count;
     cand = mirFunc;
   }
-  /* scan candidates */
+  // scan candidates
   for (uint32 i = 0; i < vcallCands.size(); ++i) {
     if (vcallCands[i] == nullptr) {
       CHECK_FATAL(false, "must not be nullptr");
diff --git a/src/maple_ir/src/lexer.cpp b/src/maple_ir/src/lexer.cpp
index cce8291a3f76d9e8e39c087934c2f7583fe12f48..d8bd9d0dee089100249406b154f53299f1e37ee1 100644
--- a/src/maple_ir/src/lexer.cpp
+++ b/src/maple_ir/src/lexer.cpp
@@ -219,6 +219,11 @@ TokenKind MIRLexer::GetIntConst(uint32 valStart, bool negative) {
       val = -val;
     }
     theIntVal = (theIntVal * hexValue) + val;
+    if (val < 0) {
+      ASSERT(theIntVal < 0, "int value overflow");
+    } else if (val > 0) {
+      ASSERT(theIntVal > 0, "int value overflow");
+    }
     c = GetNextCurrentCharWithUpperCheck();
   }
   if (c == 'u' || c == 'U') {  // skip 'u' or 'U'
@@ -330,6 +335,7 @@ TokenKind MIRLexer::GetTokenWithPrefixPercent() {
     c = GetNextCurrentCharWithUpperCheck();
     while (isdigit(c)) {
       theIntVal = (theIntVal * 10) + HexCharToDigit(c);
+      ASSERT(theIntVal >= 0, "int value overflow");
       c = GetNextCurrentCharWithUpperCheck();
     }
     name = line.substr(valStart, curIdx - valStart);
diff --git a/src/maple_util/src/profile.cpp b/src/maple_util/src/profile.cpp
index 94c86b029bfe70e68437bcf09c45195393d24f38..a46e751eaf8551beb1f2e955477f56f8cdaa8f64 100644
--- a/src/maple_util/src/profile.cpp
+++ b/src/maple_util/src/profile.cpp
@@ -500,6 +500,7 @@ void Profile::DumpFuncIRProfUseInfo() const {
 void Profile::Dump() const {
   std::ofstream outFile;
   outFile.open("prof.dump");
+  CHECK_FATAL(!outFile.is_open(), "open file failed");
   outFile << "classMeta profile start " <<'\n';
   for (const auto &item : classMeta) {
     outFile << item << '\n';