[llvm-bugs] Issue 26744 in oss-fuzz: llvm:llvm-isel-fuzzer--aarch64-gisel: ASSERT: idx < size()

[ClusterFuzz-External via monorail via llvm-bugs]

Status: New
Owner: ----
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Labels: ClusterFuzz Reproducible Stability-Memory-MemorySanitizer Engine-libfuzzer OS-Linux Proj-llvm Reported-2020-10-29
Type: Bug

New issue 26744 by ClusterFuzz-External: llvm:llvm-isel-fuzzer--aarch64-gisel: ASSERT: idx < size()
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26744

Detailed Report: https://oss-fuzz.com/testcase?key=6311368900476928

Project: llvm
Fuzzing Engine: libFuzzer
Fuzz Target: llvm-isel-fuzzer--aarch64-gisel
Job Type: libfuzzer_msan_llvm
Platform Id: linux

Crash Type: ASSERT
Crash Address: 
Crash State:
  idx < size()
  llvm::CombinerHelper::matchCombineInsertVecElts
  AArch64GenPreLegalizerCombinerHelper::tryCombineAll
  
Sanitizer: memory (MSAN)

Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_msan_llvm&range=202010280627:202010290614

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=6311368900476928

Issue filed automatically.

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