https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97125
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> --- We crash because now the C FE uses a SWITCH_STMT in the else branch: 2766 /* Compute the hash of the else branch. */ 2767 inchash::hash hstate1 (0); 2768 inchash::add_expr (elseb, hstate1); 2769 hashval_t h1 = hstate1.end (); but the fold-const.c routines don't know how to handle such a code. This is not a problem in the C++ FE because by the time we get to do_warn_duplicated_branches we've already cp_genericize'd the SWITCH_STMT tree into a SWITCH_EXPR.
