http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44938
Marc Glisse <marc.glisse at normalesup dot org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |marc.glisse at normalesup | |dot org --- Comment #1 from Marc Glisse <marc.glisse at normalesup dot org> 2011-08-06 15:47:21 UTC --- This breaks a -O3 bootstrap (-Werror turns the warning into an error). The code looks like: VEC(tree,gc) *origtypes; ... if(...) exprlist = NULL; else exprlist = c_parser_expr_list (parser, true, false, &origtypes); ... expr.value = build_function_call_vec (op_loc, expr.value, exprlist, origtypes); So g++ is right to warn (even if origtypes is probably unused in that case).