Infinite loop on LookupContext for stl map

#include <map>

template<typename K, typename V>
inline V search_map(const std::map<K, V>& mapping,
                    const K& key,
                    const V& null_result = V())
{
    typename std::map<K, V>::const_iterator i = mapping.find(key);
    if(i == mapping.end())
        return null_result;
    return i->second;
}

0	CPlusPlus::ClassOrNamespace::lookup_helper	LookupContext.cpp	639	0x52dfeac6	
1	CPlusPlus::ClassOrNamespace::lookup	LookupContext.cpp	597	0x52dfe8a2	
2	TypedefsResolver::getNamedTypeItems	ResolveExpression.cpp	929	0x52df5411	
3	TypedefsResolver::resolve	ResolveExpression.cpp	899	0x52df5216	
4	CPlusPlus::ResolveExpression::baseExpression	ResolveExpression.cpp	1041	0x52df2cd8	
5	CPlusPlus::ResolveExpression::visit	ResolveExpression.cpp	857	0x52df27ab	
6	CPlusPlus::MemberAccessAST::accept0	ASTVisit.cpp	745	0x52d19a7b	
7	CPlusPlus::AST::accept	AST.cpp	52	0x52d0d283	
8	CPlusPlus::AST::accept	AST.h	93	0x52d010a5	
9	CPlusPlus::ASTVisitor::accept	ASTVisitor.cpp	36	0x52d1f644	
10	CPlusPlus::ResolveExpression::expression	ResolveExpression.cpp	119	0x52dee31f	
11	CPlusPlus::ResolveExpression::resolve	ResolveExpression.cpp	107	0x52dee24b	
12	CPlusPlus::ResolveExpression::operator()	ResolveExpression.cpp	94	0x52dee166	
13	CPlusPlus::TypeOfExpression::operator()	TypeOfExpression.cpp	119	0x52de98c4	
14	CPlusPlus::TypeOfExpression::operator()	TypeOfExpression.cpp	88	0x52de95a0	
15	CppTools::CheckSymbols::visit	cppchecksymbols.cpp	574	0x52f5176f	
16	CPlusPlus::MemberAccessAST::accept0	ASTVisit.cpp	745	0x52d19a7b	
17	CPlusPlus::AST::accept	AST.cpp	52	0x52d0d283	
18	CPlusPlus::AST::accept	AST.h	93	0x52d010a5	
19	CPlusPlus::ReturnStatementAST::accept0	ASTVisit.cpp	826	0x52d19dcf	
20	CPlusPlus::AST::accept	AST.cpp	52	0x52d0d283	
21	CPlusPlus::AST::accept	AST.h	93	0x52d010a5	
22	CPlusPlus::AST::accept<CPlusPlus::StatementAST *>	AST.h	99	0x52d1b3d4	
23	CPlusPlus::CompoundStatementAST::accept0	ASTVisit.cpp	290	0x52d18662	
24	CPlusPlus::AST::accept	AST.cpp	52	0x52d0d283	
25	CPlusPlus::AST::accept	AST.h	93	0x52d010a5	
26	CPlusPlus::ASTVisitor::accept	ASTVisitor.cpp	36	0x52d1f644	
27	CppTools::CheckSymbols::visit	cppchecksymbols.cpp	1068	0x52f53ef7	
28	CPlusPlus::FunctionDefinitionAST::accept0	ASTVisit.cpp	471	0x52d18e4b	
29	CPlusPlus::AST::accept	AST.cpp	52	0x52d0d283	
30	CPlusPlus::AST::accept	AST.h	93	0x52d010a5	
31	CPlusPlus::TemplateDeclarationAST::accept0	ASTVisit.cpp	912	0x52d1a122	
32	CPlusPlus::AST::accept	AST.cpp	52	0x52d0d283	
33	CPlusPlus::AST::accept	AST.h	93	0x52d010a5	
34	CPlusPlus::AST::accept<CPlusPlus::DeclarationAST *>	AST.h	99	0x52d1b3a4	
35	CPlusPlus::LinkageBodyAST::accept0	ASTVisit.cpp	543	0x52d191d2	
36	CPlusPlus::AST::accept	AST.cpp	52	0x52d0d283	
37	CPlusPlus::AST::accept	AST.h	93	0x52d010a5	
38	CPlusPlus::NamespaceAST::accept0	ASTVisit.cpp	633	0x52d19585	
39	CPlusPlus::AST::accept	AST.cpp	52	0x52d0d283	
40	CPlusPlus::AST::accept	AST.h	93	0x52d010a5	
41	CPlusPlus::AST::accept<CPlusPlus::DeclarationAST *>	AST.h	99	0x52d1b3a4	
42	CPlusPlus::TranslationUnitAST::accept0	ASTVisit.cpp	928	0x52d1a1bf	
43	CPlusPlus::AST::accept	AST.cpp	52	0x52d0d283	
44	CPlusPlus::AST::accept	AST.h	93	0x52d010a5	
45	CPlusPlus::ASTVisitor::accept	ASTVisitor.cpp	36	0x52d1f644	
46	CppTools::CheckSymbols::run	cppchecksymbols.cpp	339	0x52f50afb	
47	QThreadPoolThread::run	qthreadpool.cpp	100	0x54d07c28	
48	QThreadPrivate::start	qthread_win.cpp	349	0x54d0fc35	
49	_beginthreadex	MSVCR100D		0x68fda273	
50	_beginthreadex	MSVCR100D		0x68fda204	
51	BaseThreadInitThunk	kernel32		0x7537336a	
52	__RtlUserThreadStart	ntdll		0x77b19f72	
53	_RtlUserThreadStart	ntdll		0x77b19f45