[Bug c++/57942] g++-4.8.1 tries to instantiate wrong constructor (C++11)

["richard-gccbugzilla at metafoo dot co.uk" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57942

Richard Smith <richard-gccbugzilla at metafoo dot co.uk> changed:

           What    |Removed                     |Added
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                 CC|                            |richard-gccbugzilla@metafoo
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--- Comment #1 from Richard Smith <richard-gccbugzilla at metafoo dot co.uk> ---
Reduced to:

template<typename T> struct S { typename T::error type; };
struct X {};
void f(S<int> *);
void f(...);
void g() { f((X*)0); }

It looks like, when considering a conversion from A* to B*, where A is a class
type, gcc attempts to complete B. There seems to be no obvious justification
for this (it doesn't help in determining whether B is a base class of A, which
seems like the most likely explanation for this behavior).