[llvm-bugs] Issue 29737 in oss-fuzz: llvm:clang-fuzzer: ASSERT: width && "Can't truncate to 0 bits"

[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-2021-01-19
Type: Bug

New issue 29737 by ClusterFuzz-External: llvm:clang-fuzzer: ASSERT: width && "Can't truncate to 0 bits"
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=29737

Detailed Report: https://oss-fuzz.com/testcase?key=4863395960586240

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

Crash Type: ASSERT
Crash Address: 
Crash State:
  width && "Can't truncate to 0 bits"
  llvm::APInt::trunc
  AnalyzeBitFieldAssignment
  
Sanitizer: address (ASAN)

Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201708270445:201708280446

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=4863395960586240

Issue filed automatically.

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