http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52094
arnaut.billings at yahoo dot com changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |arnaut.billings at yahoo dot com --- Comment #6 from arnaut.billings at yahoo dot com --- Cygwin gcc (GCC) 4.7.3 Nested class in wrong class with typedef name qualifier also causes a segmentation fault: struct Foo { struct Impl; }; struct Bar { typedef Foo base_type; struct base_type::Impl { }; }; Note: if "struct base_type::Impl" is changed to "struct Foo::Impl" then it will produce an error message.