http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53132
--- Comment #2 from Manuel López-Ibáñez <manu at gcc dot gnu.org> 2012-05-21 18:45:40 UTC --- (In reply to comment #1) > Manuel, any idea what is going on here? Not much. The instantiation context starts from the input_location, and that is pointing to ../include/c++/4.7.1/type_traits:1252:2. I am not sure that the C++ FE records the information that this started from some user code. Perhaps Jason knows where this information is stored. I tried to figure out at what point input_location is changed from test.cc line 12 to something in type_traits, but it is a mess... I would be very afraid to just experiment here by changing input_location, since there are likely a lot of hidden tricks and pitfalls... :-(
