[llvm-bugs] Issue 12378 in oss-fuzz: llvm/clang-fuzzer: Stack-overflow in clang::Preprocessor::LookUpIdentifierInfo

[ClusterFuzz-External via monorail via llvm-bugs]

Comment #1 on issue 12378 by ClusterFuzz-External: llvm/clang-fuzzer:  
Stack-overflow in clang::Preprocessor::LookUpIdentifierInfo
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=12378#c1

ClusterFuzz has detected this issue as fixed in range  
201901060409:201901070410.

Detailed report: https://oss-fuzz.com/testcase?key=5201005944242176

Project: llvm
Fuzzer: libFuzzer_llvm_clang-fuzzer
Fuzz target binary: clang-fuzzer
Job Type: libfuzzer_asan_llvm
Platform Id: linux

Crash Type: Stack-overflow
Crash Address: 0x7ffe6fab3fb0
Crash State:
   clang::Preprocessor::LookUpIdentifierInfo
   clang::Lexer::LexIdentifier
   clang::Lexer::LexTokenInternal

Sanitizer: address (ASAN)

Regressed:  
https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201901010410:201901030410
Fixed:  
https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201901060409:201901070410

Reproducer Testcase:  
https://oss-fuzz.com/download?testcase_id=5201005944242176

See https://github.com/google/oss-fuzz/blob/master/docs/reproducing.md for  
instructions to reproduce this bug locally.

If you suspect that the result above is incorrect, try re-doing that job on  
the test case report page.

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