Bug 266373 – [JSC] Assertion in JSC::Yarr::Interpreter<unsigned char>::InputStream::uncheckInput called from backtrackPatternCasedCharacter

• Component: JavaScriptCore
• Status: RESOLVED FIXED

[Michael Saboff]

"Xbc".match(/(?<=(ab*?))c/i);  Fails with a RELEASE_ASSERT at yarr/YarrInterpreter.cpp(403):

1   0x10a726ed8 WTFCrash
2   0x10ae3cdb4 JSC::IntlNumberFormat::initializeNumberFormat(JSC::JSGlobalObject*, JSC::JSValue, JSC::JSValue)
3   0x10cda7ebc JSC::Yarr::Interpreter<unsigned char>::InputStream::uncheckInput(unsigned int)
4   0x10cdaa524 JSC::Yarr::Interpreter<unsigned char>::backtrackPatternCasedCharacter(JSC::Yarr::ByteTerm&, JSC::Yarr::Interpreter<unsigned char>::DisjunctionContext*)
5   0x10cda5aec JSC::Yarr::Interpreter<unsigned char>::matchDisjunction(JSC::Yarr::ByteDisjunction*, JSC::Yarr::Interpreter<unsigned char>::DisjunctionContext*, bool)
6   0x10cd90114 JSC::Yarr::Interpreter<unsigned char>::interpret()
7   0x10cd8cd28 JSC::Yarr::interpret(JSC::Yarr::BytecodePattern*, WTF::StringView, unsigned int, unsigned int*)
8   0x10bbf51fc int JSC::RegExp::matchInline<WTF::Vector<int, 32ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc>, (JSC::Yarr::MatchFrom)0>(JSC::JSGlobalObject*, JSC::VM&, WTF::String const&, unsigned int, WTF::Vector<int, 32ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc>&)
9   0x10bbb028c JSC::createRegExpMatchesArray(JSC::VM&, JSC::JSGlobalObject*, JSC::JSString*, WTF::String const&, JSC::RegExp*, unsigned int, JSC::MatchResult&)
...

[Michael Saboff]

<rdar://119187095>

[Michael Saboff]

Pull request: https://github.com/WebKit/WebKit/pull/21765

[EWS]

Committed 272039@main (f59e18069da6): <https://commits.webkit.org/272039@main>

Reviewed commits have been landed. Closing PR #21765 and removing active labels.