http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47705
Summary: internal compiler error: in convert_nontype_argument, at cp/pt.c:5006 Product: gcc Version: 4.5.2 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassig...@gcc.gnu.org ReportedBy: b...@arklinux.org Running the following (invalid) code: template<char const * const x> class Something { }; extern char const xyz; class SomethingElse:public Something<xyz> { }; through gcc 4.5.2 results in: test.cpp:6:41: internal compiler error: in convert_nontype_argument, at cp/pt.c:5006 The problem with the code is that xyz should be xyz[] -- I'd expect the error message to be test.cpp:6:41: error: ‘xyz’ is not a valid template argument because ‘xyz’ is a variable, not the address of a variable Which is what you get if you remove the "const" in "extern char const xyz;"