Abort in perl_matcher_non_recursive.hpp:1090

```
Running: fusiontest-testcase-boost_regex_fuzzer-202108160001
boost_regex_fuzzer: ./boost/regex/v4/perl_matcher_non_recursive.hpp:1090: bool boost::re_detail_107300::perl_matcher<std::__wrap_iter<const char *>, std::allocator<boost::sub_match<std::__wrap_iter<const char *>>>, boost::regex_traits<char>>::match_match() [BidiIterator = std::__wrap_iter<const char *>, Allocator = std::allocator<boost::sub_match<std::__wrap_iter<const char *>>>, traits = boost::regex_traits<char>]: Assertion `0 == recursion_stack.back().idx' failed.
AddressSanitizer:DEADLYSIGNAL
=================================================================
==1392969==ERROR: AddressSanitizer: ABRT on unknown address 0x000000154149 (pc 0x7f61a9fec60b bp 0x7f61aa136248 sp 0x7ffeb21ce040 T0)
SCARINESS: 10 (signal)
    #0 0x7f61a9fec60b in raise (/lib64/libc.so.6+0x3960b)
    #1 0x7f61a9fed930 in abort (/lib64/libc.so.6+0x3a930)
    #2 0x7f61a9fe4ec9  (/lib64/libc.so.6+0x31ec9)
    #3 0x7f61a9fe4f41 in __assert_fail (/lib64/libc.so.6+0x31f41)
    #4 0x5ba467 in boost::re_detail_107300::perl_matcher<std::__1::__wrap_iter<char const*>, std::__1::allocator<boost::sub_match<std::__1::__wrap_iter<char const*> > >, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::match_match() /src/boost/./boost/regex/v4/perl_matcher_non_recursive.hpp:1090:7
    #5 0x5b6f1d in boost::re_detail_107300::perl_matcher<std::__1::__wrap_iter<char const*>, std::__1::allocator<boost::sub_match<std::__1::__wrap_iter<char const*> > >, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::match_all_states() /src/boost/./boost/regex/v4/perl_matcher_non_recursive.hpp:211:14
    #6 0x5b83d3 in boost::re_detail_107300::perl_matcher<std::__1::__wrap_iter<char const*>, std::__1::allocator<boost::sub_match<std::__1::__wrap_iter<char const*> > >, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::match_startmark() /src/boost/./boost/regex/v4/perl_matcher_non_recursive.hpp:425:14
    #7 0x5b6f1d in boost::re_detail_107300::perl_matcher<std::__1::__wrap_iter<char const*>, std::__1::allocator<boost::sub_match<std::__1::__wrap_iter<char const*> > >, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::match_all_states() /src/boost/./boost/regex/v4/perl_matcher_non_recursive.hpp:211:14
    #8 0x5b1a8d in boost::re_detail_107300::perl_matcher<std::__1::__wrap_iter<char const*>, std::__1::allocator<boost::sub_match<std::__1::__wrap_iter<char const*> > >, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::match_prefix() /src/boost/./boost/regex/v4/perl_matcher_common.hpp:338:4
    #9 0x5b0f1b in boost::re_detail_107300::perl_matcher<std::__1::__wrap_iter<char const*>, std::__1::allocator<boost::sub_match<std::__1::__wrap_iter<char const*> > >, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::match_imp() /src/boost/./boost/regex/v4/perl_matcher_common.hpp:222:12
    #10 0x5ae240 in boost::re_detail_107300::perl_matcher<std::__1::__wrap_iter<char const*>, std::__1::allocator<boost::sub_match<std::__1::__wrap_iter<char const*> > >, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::match() /src/boost/./boost/regex/v4/perl_matcher_common.hpp:195:11
    #11 0x5adc7c in bool boost::regex_match<std::__1::__wrap_iter<char const*>, std::__1::allocator<boost::sub_match<std::__1::__wrap_iter<char const*> > >, char, boost::regex_traits<char, boost::cpp_regex_traits<char> > >(std::__1::__wrap_iter<char const*>, std::__1::__wrap_iter<char const*>, boost::match_results<std::__1::__wrap_iter<char const*>, std::__1::allocator<boost::sub_match<std::__1::__wrap_iter<char const*> > > >&, boost::basic_regex<char, boost::regex_traits<char, boost::cpp_regex_traits<char> > > const&, boost::regex_constants::_match_flags) /src/boost/./boost/regex/v4/regex_match.hpp:50:19
    #12 0x557ef8 in bool boost::regex_match<std::__1::char_traits<char>, std::__1::allocator<char>, std::__1::allocator<boost::sub_match<std::__1::__wrap_iter<char const*> > >, char, boost::regex_traits<char, boost::cpp_regex_traits<char> > >(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, boost::match_results<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::const_iterator, std::__1::allocator<boost::sub_match<std::__1::__wrap_iter<char const*> > > >&, boost::basic_regex<char, boost::regex_traits<char, boost::cpp_regex_traits<char> > > const&, boost::regex_constants::_match_flags) /src/boost/./boost/regex/v4/regex_match.hpp:82:11
    #13 0x5578a8 in LLVMFuzzerTestOneInput /src/boost/../boost_regex_fuzzer.cc:50:18
    #14 0x45c813 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:599:15
    #15 0x447f82 in fuzzer::RunOneTest(fuzzer::Fuzzer*, char const*, unsigned long) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerDriver.cpp:323:6
    #16 0x44dc4e in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerDriver.cpp:856:9
    #17 0x477702 in main /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerMain.cpp:20:10
    #18 0x7f61a9fd8b26 in __libc_start_main (/lib64/libc.so.6+0x25b26)
    #19 0x423a29 in _start (/opt/oss-fuzz/build/out/boost/boost_regex_fuzzer+0x423a29)

DEDUP_TOKEN: raise--abort--
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: ABRT (/lib64/libc.so.6+0x3960b) in raise
==1392969==ABORTING
```

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