[llvm-bugs] Issue 4871 in oss-fuzz: llvm/llvm-opt-fuzzer--x86_64-instcombine: ASSERT: getActiveBits() <= 64 && "Too many bits for uint64_t"

[ClusterFuzz-External via monorail via llvm-bugs]

Status: New
Owner: ----
CC: kcc at google.com, mascasa at google.com, jdevlieg... at apple.com,  
igm... at gmail.com, llvm-b... at lists.llvm.org, v... at apple.com,  
akils... at apple.com
Labels: ClusterFuzz Stability-Memory-AddressSanitizer Reproducible  
Engine-libfuzzer Proj-llvm Reported-2018-01-02
Type: Bug

New issue 4871 by ClusterFuzz-External:  
llvm/llvm-opt-fuzzer--x86_64-instcombine: ASSERT: getActiveBits() <= 64  
&& "Too many bits for uint64_t"
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=4871

Detailed report: https://oss-fuzz.com/testcase?key=5497937917378560

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

Crash Type: ASSERT
Crash Address:
Crash State:
   getActiveBits() <= 64 && "Too many bits for uint64_t"
   canEvaluateShifted
   llvm::InstCombiner::FoldShiftByConstant

Sanitizer: address (ASAN)

Regressed:  
https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201712190608:201712210617

Reproducer Testcase:  
https://oss-fuzz.com/download?testcase_id=5497937917378560

Issue filed automatically.

See https://github.com/google/oss-fuzz/blob/master/docs/reproducing.md for  
more information.

When you fix this bug, please
   * mention the fix revision(s).
   * state whether the bug was a short-lived regression or an old bug in any  
stable releases.
   * add any other useful information.
This information can help downstream consumers.

If you have questions for the OSS-Fuzz team, please file an issue at  
https://github.com/google/oss-fuzz/issues.

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