[llvm-bugs] Issue 15587 in oss-fuzz: llvm/llvm-opt-fuzzer--x86_64-instcombine: ASSERT: isa(Val) && "cast() argument of incompatible type!"

[ClusterFuzz-External via monorail via llvm-bugs]

Status: New
Owner: ----
CC: k...@google.com, masc...@google.com, jdevlieg...@apple.com,  
igm...@gmail.com, mit...@google.com, bigchees...@gmail.com,  
eney...@google.com, llvm-b...@lists.llvm.org, j...@chromium.org,  
v...@apple.com, mitchphi...@outlook.com, xpl...@gmail.com,  
akils...@apple.com
Labels: ClusterFuzz Reproducible Stability-Memory-MemorySanitizer  
Engine-libfuzzer OS-Linux Proj-llvm Reported-2019-06-30
Type: Bug
New issue 15587 by ClusterFuzz-External:  
llvm/llvm-opt-fuzzer--x86_64-instcombine: ASSERT: isa<X>(Val)  
&& "cast<Ty>() argument of incompatible type!"
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=15587

Detailed report: https://oss-fuzz.com/testcase?key=5690036105773056

Project: llvm
Fuzzer: libFuzzer_llvm_llvm-opt-fuzzer--x86_64-instcombine
Fuzz target binary: llvm-opt-fuzzer--x86_64-instcombine
Job Type: libfuzzer_msan_llvm
Platform Id: linux

Crash Type: ASSERT
Crash Address:
Crash State:
  isa<X>(Val) && "cast<Ty>() argument of incompatible type!"
  llvm::InstCombiner::commonShiftTransforms
  llvm::InstCombiner::visitAShr

Sanitizer: memory (MSAN)

Regressed:  
https://oss-fuzz.com/revisions?job=libfuzzer_msan_llvm&range=201906290306:201906300300

Reproducer Testcase:  
https://oss-fuzz.com/download?testcase_id=5690036105773056

Issue filed automatically.

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

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