http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51225
--- Comment #2 from Volker Reichelt <reichelt at gcc dot gnu.org> 2011-12-04 22:46:24 UTC --- Here's another code snippet that triggers a similar ICE: ==================================== struct A {}; template<typename> struct B { static constexpr A a = A(x); }; ==================================== bug.cc:5:28: error: 'x' was not declared in this scope bug.cc:5:29: internal compiler error: unexpected expression '(const A)(A)(<expression error>)' of kind implicit_conv_expr Please submit a full bug report, [etc.]