QScriptEngine::evaluate crash

Attached are the call stack of QScript evaluate function and dmp files.

Call stack:

QtScript4.dll!QHash<QChar,int>::findNode(const QChar & akey=

{...}, unsigned int * ahp=0x096cfc50) Line 863 C++
QtScript4.dll!QHash<QChar,int>::operator[](const QChar & akey={...}

) Line 726 + 0xc bytes C++
QtScript4.dll!QScript::Ecma::RegExp::flagFromChar(const QChar & ch=

{...}) Line 234 + 0x1c bytes C++
QtScript4.dll!QScript::Lexer::scanRegExp(QScript::Lexer::RegExpBodyPrefix prefix=158072935) Line 1082 + 0xf bytes C++
QtScript4.dll!QScriptParser::parse(QScriptEnginePrivate * driver=0x0411e008) Line 206 C++
QtScript4.dll!QScriptEnginePrivate::createAbstractSyntaxTree(const QString & source={...}

, int lineNumber=1, QString * errorMessage=0x096cfe1c, int * errorLineNumber=0x096cfe2c) Line 611 + 0x13 bytes C++
QtScript4.dll!QScript::EvalFunction::evaluate(QScriptContextPrivate * context=, const QString & contents=, int lineNo=, const QString & fileName=, bool calledFromScript=) Line 320 C++