The following valid code snippet triggers an ICE on mainline:
==========================================
template<typename T> struct A
{
void foo() const;
} __attribute((aligned(4)));
template<typename T> void A<T>::foo() const {}
==========================================
bug.cc:6: internal compiler error: canonical types differ for identical types
const A<T> and const A<T>
Please submit a full bug report, [etc.]
The ICE is pretty recent, it appeared between 2008-01-22 and 2008-01-28.
--
Summary: [4.3 regression] ICE with attribute "aligned" for
template classes
Product: gcc
Version: 4.3.0
Status: UNCONFIRMED
Keywords: ice-on-valid-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=35074
