https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88613
--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> --- Author: jason Date: Fri Jan 11 22:36:20 2019 New Revision: 267859 URL: https://gcc.gnu.org/viewcvs?rev=267859&root=gcc&view=rev Log: PR c++/88613 - ICE with use of const var in lambda. The issue here was that we were cp_folding a location wrapper around a lambda capture proxy before it had been mark_rvalue_used. I considered adding mark_rvalue_use calls to build_new_op_1, but it seems appropriate to have them in cp_fold_maybe_rvalue when we know we're trying to produce an rvalue. The change to mark_use is for a related issue: when we change the operand of the location wrapper from VAR_DECL to INTEGER_CST, we need the TREE_CODE of the location wrapper to change as well, from VIEW_CONVERT_EXPR to NON_LVALUE_EXPR. * expr.c (mark_use): Fix location wrapper handling. * cp-gimplify.c (cp_fold_maybe_rvalue): Call mark_rvalue_use. Added: trunk/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-const10.C Modified: trunk/gcc/cp/ChangeLog trunk/gcc/cp/cp-gimplify.c trunk/gcc/cp/expr.c
