Status: New
Owner: ----
CC: k...@google.com, masc...@google.com, jdevlieg...@apple.com,
igm...@gmail.com, d...@google.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 Stability-Memory-AddressSanitizer Unreproducible
Engine-libfuzzer OS-Linux Proj-llvm Reported-2020-09-17
Type: Bug
New issue 25717 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=25717
Detailed Report: https://oss-fuzz.com/testcase?key=6574019162931200
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!"
std::__1::__function::__func<validShuffleVectorIndex
llvm::RandomIRBuilder::newSource
Sanitizer: address (ASAN)
Crash Revision:
https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&revision=202006240154
Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=6574019162931200
Issue filed automatically.
See https://google.github.io/oss-fuzz/advanced-topics/reproducing for
instructions to reproduce this bug locally.
************************* UNREPRODUCIBLE *************************
Note: This crash might not be reproducible with the provided testcase. That
said, for the past 14 days, we've been seeing this crash frequently.
It may be possible to reproduce by trying the following options:
- Run testcase multiple times for a longer duration.
- Run fuzzing without testcase argument to hit the same crash signature.
If it still does not reproduce, try a speculative fix based on the crash
stacktrace and verify if it works by looking at the crash statistics in the
report. We will auto-close the bug if the crash is not seen for 14 days.
******************************************************************
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 need to contact the OSS-Fuzz team with a question, concern, or any other
feedback, please file an issue at https://github.com/google/oss-fuzz/issues.
Comments on individual Monorail issues are not monitored.
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