[llvm-bugs] Issue 12435 in oss-fuzz: llvm/llvm-microsoft-demangle-fuzzer: Null-dereference READ in llvm::ms_demangle::Demangler::demangleVariableEncoding

[ClusterFuzz-External via monorail via llvm-bugs]

Comment #6 on issue 12435 by ClusterFuzz-External:  
llvm/llvm-microsoft-demangle-fuzzer: Null-dereference READ in  
llvm::ms_demangle::Demangler::demangleVariableEncoding
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=12435#c6

ClusterFuzz has detected this issue as fixed in range  
201903270300:201904052014.

Detailed report: https://oss-fuzz.com/testcase?key=5678733216710656

Project: llvm
Fuzzer: libFuzzer_llvm_llvm-microsoft-demangle-fuzzer
Fuzz target binary: llvm-microsoft-demangle-fuzzer
Job Type: libfuzzer_asan_llvm
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000008
Crash State:
   llvm::ms_demangle::Demangler::demangleVariableEncoding
   llvm::ms_demangle::Demangler::demangleEncodedSymbol
   llvm::ms_demangle::Demangler::parse

Sanitizer: address (ASAN)

Regressed:  
https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201901070410:201901080410
Fixed:  
https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201903270300:201904052014

Reproducer Testcase:  
https://oss-fuzz.com/download?testcase_id=5678733216710656

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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