[Webkit-unassigned] [Bug 163314] New: Assertion failed under operationToLowerCase opening inspector²

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=163314

            Bug ID: 163314
           Summary: Assertion failed under operationToLowerCase opening
                    inspector²
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: joepeck at webkit.org
                CC: sbarati at apple.com

Summary:
Assertion failed under operationToLowerCase opening inspector²

Steps to Reproduce:
1. Get a debug build
2. Open inspector¹
3. Open inspector²
  => ASSERT

ASSERTION FAILED: length
Source/WTF/wtf/text/StringImpl.cpp(182) : static Ref<WTF::StringImpl> WTF::StringImpl::createUninitializedInternalNonEmpty(unsigned int, CharType *&) [CharType = unsigned char]
1   0x10ed908bd WTFCrash
2   0x10eddceb8 WTF::Ref<WTF::StringImpl> WTF::StringImpl::createUninitializedInternalNonEmpty<unsigned char>(unsigned int, unsigned char*&)
3   0x10eddda14 WTF::StringImpl::convertToLowercaseWithoutLocaleStartingAtFailingIndex8Bit(unsigned int)
4   0x10ee08b6d WTF::String::convertToLowercaseWithoutLocaleStartingAtFailingIndex8Bit(unsigned int) const
5   0x10e3000fa operationToLowerCase
6   0x48aabb23e3bf
7   0x48aabb23aa57
8   0x48aabb1cf352
9   0x48aabb22dd82
10  0x48aabb1c522c
11  0x48aabb189510
12  0x48aabb2020c6
13  0x48aabb2153ec
14  0x48aabb15bb20
15  0x48aabb17f001
16  0x10e9756ba llint_entry
17  0x10e975734 llint_entry
18  0x10e96e24e vmEntryToJavaScript
19  0x10e757429 JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*)
20  0x10e6d6bbf JSC::Interpreter::executeCall(JSC::ExecState*, JSC::JSObject*, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&)
21  0x10df3c538 JSC::call(JSC::ExecState*, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&)
22  0x10e7b26cd JSC::boundThisNoArgsFunctionCall(JSC::ExecState*)
23  0x48aabb0126e7
24  0x10e975b7c llint_entry
25  0x10e9756ba llint_entry
26  0x10e9756ba llint_entry
27  0x10e9756ba llint_entry
28  0x10e96e24e vmEntryToJavaScript
29  0x10e757429 JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*)
30  0x10e6d6bbf JSC::Interpreter::executeCall(JSC::ExecState*, JSC::JSObject*, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&)
31  0x10df3c538 JSC::call(JSC::ExecState*, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&)

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