Note: Google Test filter = *PeepholeStaleOffsetAfterSequence*
[==========] Running 1 test from 1 test suite.
[----------] Global test environment set-up.
[----------] 1 test from RegExpTest
[ RUN      ] RegExpTest.PeepholeStaleOffsetAfterSequence
[POC] SkipUntilOneOfMasked @168  on_match2=296  length=220
=================================================================
==3539==ERROR: AddressSanitizer: use-after-poison on address 0x7e1c10e01030 at pc 0x556e65cbb76f bp 0x7ffc62e46eb0 sp 0x7ffc62e46ea8
READ of size 8 at 0x7e1c10e01030 thread T0
    #0 0x556e65cbb76e in v8::internal::regexp::CodeGenerator::PreVisitBytecodes() v8/src/utils/bit-vector.h:235:13
    #1 0x556e65cb7e33 in v8::internal::regexp::CodeGenerator::Assemble(v8::internal::DirectHandle<v8::internal::RegExpData>, v8::base::Flags<v8::internal::regexp::Flag, int, int>) v8/src/regexp/regexp-code-generator.cc:58:3
    #2 0x556e622e378c in v8::internal::RegExpTest_PeepholeStaleOffsetAfterSequence_Test::TestBody() v8/test/unittests/regexp/regexp-unittest.cc:2595:16
    #3 0x556e69d27c0b in testing::Test::Run() third_party/googletest/src/googletest/src/gtest.cc
    #4 0x556e69d2a8b7 in testing::TestInfo::Run() third_party/googletest/src/googletest/src/gtest.cc:2892:11
    #5 0x556e69d2c823 in testing::TestSuite::Run() third_party/googletest/src/googletest/src/gtest.cc:3070:30
    #6 0x556e69d5c48a in testing::internal::UnitTestImpl::RunAllTests() third_party/googletest/src/googletest/src/gtest.cc:6062:44
    #7 0x556e69d5aeee in testing::UnitTest::Run() third_party/googletest/src/googletest/src/gtest.cc
    #8 0x556e622f6097 in main third_party/googletest/src/googletest/include/gtest/gtest.h:2337:73
    #9 0x7fcc11dde249  (/lib/x86_64-linux-gnu/libc.so.6+0x27249) (BuildId: 6196744a316dbd57c0fd8968df1680aac482cec4)

0x7e1c10e01030 is located 1840 bytes inside of 8192-byte region [0x7e1c10e00900,0x7e1c10e02900)
allocated by thread T0 here:
    #0 0x556e612cf324 in malloc (/chromium/chromium/src/out/asan/v8_unittests+0x50b7324) (BuildId: ae2dd29d2e007245)
    #1 0x556e6609ebd7 in v8::internal::AllocAtLeastWithRetry(unsigned long) v8/src/base/platform/memory.h:44:10
    #2 0x556e660a9f60 in v8::internal::AccountingAllocator::AllocateSegment(unsigned long) v8/src/zone/accounting-allocator.cc:121:14
    #3 0x556e660ae0b6 in v8::internal::Zone::Expand(unsigned long) v8/src/zone/zone.cc:178:34
    #4 0x556e660adf72 in v8::internal::Zone::AsanNew(unsigned long) v8/src/zone/zone.cc:52:5
    #5 0x556e65cb7892 in v8::internal::regexp::CodeGenerator::CodeGenerator(v8::internal::Isolate*, v8::internal::regexp::RegExpMacroAssembler*, v8::internal::DirectHandle<v8::internal::TrustedByteArray>) v8/src/zone/zone.h:57:12
    #6 0x556e622e374c in v8::internal::RegExpTest_PeepholeStaleOffsetAfterSequence_Test::TestBody() v8/test/unittests/regexp/regexp-unittest.cc:2592:25
    #7 0x556e69d27c0b in testing::Test::Run() third_party/googletest/src/googletest/src/gtest.cc
    #8 0x556e69d2a8b7 in testing::TestInfo::Run() third_party/googletest/src/googletest/src/gtest.cc:2892:11
    #9 0x556e69d2c823 in testing::TestSuite::Run() third_party/googletest/src/googletest/src/gtest.cc:3070:30
    #10 0x556e69d5c48a in testing::internal::UnitTestImpl::RunAllTests() third_party/googletest/src/googletest/src/gtest.cc:6062:44
    #11 0x556e69d5aeee in testing::UnitTest::Run() third_party/googletest/src/googletest/src/gtest.cc
    #12 0x556e622f6097 in main third_party/googletest/src/googletest/include/gtest/gtest.h:2337:73
    #13 0x7fcc11dde249  (/lib/x86_64-linux-gnu/libc.so.6+0x27249) (BuildId: 6196744a316dbd57c0fd8968df1680aac482cec4)

SUMMARY: AddressSanitizer: use-after-poison v8/src/utils/bit-vector.h:235:13 in v8::internal::regexp::CodeGenerator::PreVisitBytecodes()
Shadow bytes around the buggy address:
  0x7e1c10e00d80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x7e1c10e00e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x7e1c10e00e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x7e1c10e00f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x7e1c10e00f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f7
=>0x7e1c10e01000: f7 f7 00 00 00 00[f7]f7 f7 00 00 00 00 f7 f7 f7
  0x7e1c10e01080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x7e1c10e01100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x7e1c10e01180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x7e1c10e01200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x7e1c10e01280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07 
  Heap left redzone:       fa
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack after return:      f5
  Stack use after scope:   f8
  Global redzone:          f9
  Global init order:       f6
  Poisoned by user:        f7
  Container overflow:      fc
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
  Left alloca redzone:     ca
  Right alloca redzone:    cb

NOTE: the stack trace above identifies the code that *accessed* the poisoned memory.
To identify the code that *poisoned* the memory, try the experimental setting ASAN_OPTIONS=poison_history_size=<size>.
==3539==ABORTING