Qt 4.8.5 doesn't compile with VC11 (VS2012)

YarrJIT.cpp
.\wtf/HashSet.h(180) : error C2664: 'std::pair<_Ty1,_Ty2>::pair(const std::pair<
_Ty1,_Ty2> &)' : cannot convert parameter 1 from 'std::pair<_Ty1,_Ty2>' to 'cons
t std::pair<_Ty1,_Ty2> &'
        with
        [
            _Ty1=WTF::HashTableConstIteratorAdapter<WTF::HashTable<void *,void *
,WTF::IdentityExtractor<void *>,WTF::PtrHash<void *>,WTF::HashTraits<void *>,WTF
::HashTraits<void *>>,void *>,
            _Ty2=bool
        ]
        and
        [
            _Ty1=WTF::HashTableIterator<void *,void *,WTF::IdentityExtractor<voi
d *>,WTF::PtrHash<void *>,WTF::HashTraits<void *>,WTF::HashTraits<void *>>,
            _Ty2=bool
        ]
        and
        [
            _Ty1=WTF::HashTableConstIteratorAdapter<WTF::HashTable<void *,void *
,WTF::IdentityExtractor<void *>,WTF::PtrHash<void *>,WTF::HashTraits<void *>,WTF
::HashTraits<void *>>,void *>,
            _Ty2=bool
        ]
        Reason: cannot convert from 'std::pair<_Ty1,_Ty2>' to 'const std::pair<_
Ty1,_Ty2>'
        with
        [
            _Ty1=WTF::HashTableIterator<void *,void *,WTF::IdentityExtractor<voi
d *>,WTF::PtrHash<void *>,WTF::HashTraits<void *>,WTF::HashTraits<void *>>,
            _Ty2=bool
        ]
        and
        [
            _Ty1=WTF::HashTableConstIteratorAdapter<WTF::HashTable<void *,void *
,WTF::IdentityExtractor<void *>,WTF::PtrHash<void *>,WTF::HashTraits<void *>,WTF
::HashTraits<void *>>,void *>,
            _Ty2=bool
        ]
        No user-defined-conversion operator available that can perform this conv
ersion, or the operator cannot be called
        .\wtf/HashSet.h(179) : while compiling class template member function 's
td::pair<_Ty1,_Ty2> WTF::HashSet<ValueArg>::add(void *const &)'
        with
        [
            _Ty1=WTF::HashTableConstIteratorAdapter<WTF::HashTable<void *,void *
,WTF::IdentityExtractor<void *>,WTF::PtrHash<void *>,WTF::HashTraits<void *>,WTF
::HashTraits<void *>>,void *>,
            _Ty2=bool,
            ValueArg=void *
        ]
        c:\users\heinz\qt\4.8.5\src\3rdparty\webkit\source\javascriptcore\heap\M
arkStack.h(74) : see reference to function template instantiation 'std::pair<_Ty
1,_Ty2> WTF::HashSet<ValueArg>::add(void *const &)' being compiled
        with
        [
            _Ty1=WTF::HashTableConstIteratorAdapter<WTF::HashTable<void *,void *
,WTF::IdentityExtractor<void *>,WTF::PtrHash<void *>,WTF::HashTraits<void *>,WTF
::HashTraits<void *>>,void *>,
            _Ty2=bool,
            ValueArg=void *
        ]
        c:\users\heinz\qt\4.8.5\src\3rdparty\webkit\source\javascriptcore\heap\M
arkStack.h(195) : see reference to class template instantiation 'WTF::HashSet<Va
lueArg>' being compiled
        with
        [
            ValueArg=void *
        ]
Generating Code...
NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio 11.0
\VC\BIN\cl.EXE"' : return code '0x2'
Stop.