Hmm, the summary is really bad. I'm seeing the attached testcase to fail on 4.2.0 and 4.1.0, both with -O0 and with -O2.
-- Summary: miscompile with classes without copy constructor Product: gcc Version: 4.1.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: middle-end AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: mueller at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25977