[llvm-bugs] Issue 27416 in oss-fuzz: llvm:llvm-opt-fuzzer--x86_64-instcombine: ASSERT: isa<X>(Val) && "cast<Ty>() argument of incompatible type!"

[ClusterFuzz-External via monorail via llvm-bugs]

Status: New
Owner: ----
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Labels: ClusterFuzz Stability-Memory-AddressSanitizer Reproducible Engine-libfuzzer OS-Linux Proj-llvm Reported-2020-11-12
Type: Bug

New issue 27416 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=27416

Detailed Report: https://oss-fuzz.com/testcase?key=5166553167036416

Project: llvm
Fuzzing Engine: libFuzzer
Fuzz Target: llvm-opt-fuzzer--x86_64-instcombine
Job Type: libfuzzer_asan_llvm
Platform Id: linux

Crash Type: ASSERT
Crash Address: 
Crash State:
  isa<X>(Val) && "cast<Ty>() argument of incompatible type!"
  llvm::ShuffleVectorInst::isIdentityWithPadding
  llvm::InstCombinerImpl::visitInsertElementInst
  
Sanitizer: address (ASAN)

Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=202009020614:202009030629

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5166553167036416

Issue filed automatically.

See https://google.github.io/oss-fuzz/advanced-topics/reproducing for instructions to reproduce this bug locally.
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