Using auto as template parameter triggers ICEs in lots of different places on mainline, e.g.
============================== template<typename> struct A { enum { e }; }; A<auto> a; ============================== bug.cc: In instantiation of 'A<auto>': bug.cc:6: instantiated from here bug.cc:2: internal compiler error: in finish_member_declaration, at cp/semantics.c:2333 Please submit a full bug report, [etc.] ============================== template<typename T> struct A { A() : i() {} int i; }; A<auto> a; ============================== bug.cc: In constructor 'A<T>::A() [with T = auto]': bug.cc:7: instantiated from here bug.cc:3: internal compiler error: Segmentation fault Please submit a full bug report, [etc.] Shouldn't auto as a template parameter trigger an error right away? These bugs appeared with the patches for the new 'auto' semantics. -- Summary: [4.4 regression] ICE with auto as template parameter Product: gcc Version: 4.4.0 Status: UNCONFIRMED Keywords: ice-on-invalid-code, monitored Severity: normal Priority: P3 Component: c++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: reichelt at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37968