https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93712
--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Marek Polacek <mpola...@gcc.gnu.org>: https://gcc.gnu.org/g:b07c085581eb98cde408d9583ee17d58832826ae commit r10-6820-gb07c085581eb98cde408d9583ee17d58832826ae Author: Marek Polacek <pola...@redhat.com> Date: Thu Feb 13 14:05:51 2020 -0500 c++: Fix ICE with ill-formed array list-initialization [PR93712] My P0388R4 patch changed build_array_conv to create an identity conversion at the start of the conversion chain and now we crash in convert_like_real: 7457 case ck_identity: 7458 if (BRACE_ENCLOSED_INITIALIZER_P (expr)) 7459 { 7460 int nelts = CONSTRUCTOR_NELTS (expr); 7461 if (nelts == 0) 7462 expr = build_value_init (totype, complain); 7463 else if (nelts == 1) 7464 expr = CONSTRUCTOR_ELT (expr, 0)->value; 7465 else 7466 gcc_unreachable (); // HERE 7467 } in a test like this int f (int const (&)[2]) { return f({1, "M"}); } Instead of creating a ck_identity at the start of the conversion chain, so that conv_get_original_expr can be used with a ck_aggr, let's set u.expr for a ck_aggr, and adjust next_conversion not to try to see what's next in the chain if it gets a ck_aggr. 2020-02-24 Marek Polacek <pola...@redhat.com> PR c++/93712 - ICE with ill-formed array list-initialization. * call.c (next_conversion): Return NULL for ck_aggr. (build_aggr_conv): Set u.expr instead of u.next. (build_array_conv): Likewise. (build_complex_conv): Likewise. (conv_get_original_expr): Handle ck_aggr. * g++.dg/cpp0x/initlist-array11.C: New test.
