The following invalid code snippet triggers an ICE on mainline: ================================================================ template<template<int> class... T> struct A { void foo(T<0>); void bar(T<0>); }; ================================================================
bug.cc:3: error: parameter packs not expanded with `...': bug.cc:3: note: 'template<int <anonymous> > class T' bug.cc:4: internal compiler error: tree check: expected class 'type', have 'exceptional' (error_mark) in bind_template_template_parm, at cp/tree.c:1242 Please submit a full bug report, [etc.] The ICE appeared between 2007-10-13 and 2007-11-13. -- Summary: [4.3 regression] ICE with invalid function arguments in variadic template Product: gcc Version: 4.3.0 Status: UNCONFIRMED Keywords: ice-on-invalid-code, error-recovery, 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=34754