The following invalid code snippet causes an ICE on mainline:
============================================
template<typename T> friend void T::foo;
============================================
bug.cc:1: error: variable or field 'foo' declared void
bug.cc:1: internal compiler error: in is_ancestor, at cp/name-lookup.c:2233
Please submit a full bug report, [etc.]
Mark, this is probably (minor) fallout from PR 27102.
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Summary: [4.2 regression] ICE with invalid friend declaration
Product: gcc
Version: 4.2.0
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=27808
