[llvm-bugs] Issue 4557 in oss-fuzz: llvm/clangd-fuzzer: Null-dereference READ in void llvm::yaml::skip<llvm::yaml::MappingNode>

[ClusterFuzz-External via monorail via llvm-bugs]

Comment #3 on issue 4557 by ClusterFuzz-External: llvm/clangd-fuzzer:  
Null-dereference READ in void llvm::yaml::skip<llvm::yaml::MappingNode>
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=4557#c3

ClusterFuzz has detected this issue as fixed in range  
201711160610:201712080609.

Detailed report: https://oss-fuzz.com/testcase?key=5055395132342272

Project: llvm
Fuzzer: libFuzzer_llvm_clangd-fuzzer
Fuzz target binary: clangd-fuzzer
Job Type: libfuzzer_asan_llvm
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
   void llvm::yaml::skip<llvm::yaml::MappingNode>
   llvm::yaml::SequenceNode::skip
   llvm::yaml::MappingNode::increment

Sanitizer: address (ASAN)

Regressed:  
https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201710260448:201710270453
Fixed:  
https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201711160610:201712080609

Reproducer Testcase:  
https://oss-fuzz.com/download?testcase_id=5055395132342272

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

If you suspect that the result above is incorrect, try re-doing that job on  
the test case report page.

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