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Bug 21955 - [fuzz, binary] Assertion `StartColNo <= EndColNo && "Trying to highlight whitespace??"' failed.
Summary: [fuzz, binary] Assertion `StartColNo <= EndColNo && "Trying to highlight whit...
Status: NEW
Alias: None
Product: clang
Classification: Unclassified
Component: -New Bugs (show other bugs)
Version: trunk
Hardware: PC Linux
: P normal
Assignee: Unassigned Clang Bugs
URL:
Keywords:
Depends on:
Blocks: 23057
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Reported: 2014-12-18 06:43 PST by Sami Liedes
Modified: 2015-03-30 19:00 PDT (History)
1 user (show)

See Also:
Fixed By Commit(s):

Attachments
test case (21 bytes, text/x-c++src)
2014-12-18 06:43 PST, Sami Liedes 		Details
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Description Sami Liedes 2014-12-18 06:43:13 PST 
Created attachment 13566 [details]
test case

Fuzzing discovered that the attached test case, which contains a null byte, when given as input to

  clang -fno-crash-diagnostics -std=c++11 -xc++ -c -emit-llvm

causes this assertion failure:

clang-3.6: tools/clang/lib/Frontend/TextDiagnostic.cpp:969: void highlightRange(const clang::CharSourceRange&, unsigned int, clang::FileID, const {anonymous}::SourceColumnMap&, std::string&, const clang::SourceManager&, const clang::LangOptions&): Assertion `StartColNo <= EndColNo && "Trying to highlight whitespace??"' failed.