The following invalid testcase causes an ICE since GCC 4.0.0:
===========================================
template<int> void foo(struct {}*);
void bar()
{
foo<0>(0);
}
===========================================
bug.cc:1: error: template class without a name
bug.cc:1: error: types may not be defined in parameter types
bug.cc:5: error: conflicting declaration 'struct<anonymous>'
bug.cc:5: error: 'struct<anonymous>' has a previous declaration as
'struct<anonymous>'
bug.cc: In function 'void bar()':
bug.cc:5: internal compiler error: tree check: expected tree that contains
'decl minimal' structure, have 'error_mark' in pushtag, at
cp/name-lookup.c:4865
Please submit a full bug report, [etc.]
Moreover only the second line of the error message makes sense.
The "conflicting declaration" message is completely bogus, and the
first line looks bogus to me, too.
--
Summary: [4.0/4.1/4.2 regression] ICE with struct definition in
argument of template function
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Keywords: ice-on-invalid-code, error-recovery, diagnostic,
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=28114
