https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86485
--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> --- Author: jason Date: Tue May 7 22:37:19 2019 New Revision: 270985 URL: https://gcc.gnu.org/viewcvs?rev=270985&root=gcc&view=rev Log: PR c++/86485 - -Wmaybe-unused with empty class ?: * typeck.c (build_static_cast_1): Use cp_build_addr_expr. For GCC 9 I fixed this bug with a patch to gimplify_cond_expr, but this function was also doing the wrong thing. Using build_address does not push the ADDR_EXPR down into the arms of a COND_EXPR, which we need for proper handling of conversion of an lvalue ?: to another reference type. Modified: trunk/gcc/cp/ChangeLog trunk/gcc/cp/typeck.c
