The C++ frontend issues an ICE when compiling the following invalid code snippet:
================ void foo() { ({x;}); } ================ bug.cc: In function 'void foo()': bug.cc:3: error: 'x' was not declared in this scope bug.cc:3: internal compiler error: tree check: expected class 'type', have 'exceptional' (error_mark) in finish_stmt_expr_expr, at cp/semantics.c:1546 Please submit a full bug report, [etc.] The appeared in gcc 3.4.0. -- Summary: [3.4/4.0 regression] ICE on undefined variable in statement expression Product: gcc Version: 4.0.0 Status: UNCONFIRMED Keywords: ice-on-invalid-code, error-recovery, monitored Severity: normal Priority: P2 Component: c++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: reichelt at gcc dot gnu dot org CC: gcc-bugs at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20147