The following valid code snippet triggers an ICE on mainline and 4.2 branch:
=========================== struct A { int i[0]; A(); A(const A&); }; void foo() { A a = ({ A(); }); } =========================== bug.cc: In function 'void foo()': bug.cc:10: internal compiler error: in create_tmp_var, at gimplify.c:488 Please submit a full bug report, [etc.] -- Summary: [4.2/4.3 regression] ICE with statement expression Product: gcc Version: 4.3.0 Status: UNCONFIRMED Keywords: ice-on-valid-code, monitored Severity: normal Priority: P3 Component: middle-end 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=31337