https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88752
--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> --- Author: jason Date: Thu Jan 31 15:03:21 2019 New Revision: 268424 URL: https://gcc.gnu.org/viewcvs?rev=268424&root=gcc&view=rev Log: PR c++/88752 - ICE with lambda and constexpr if. In this testcase, we look for an instantiation of the outer lambda from within the inner lambda. enclosing_instantiation_of didn't handle this properly, as it assumed that any references would be from the same lambda nesting depth. Fixed thus. * cp-tree.h (LAMBDA_EXPR_INSTANTIATED): New. * pt.c (tsubst_lambda_expr): Set it. (instantiated_lambda_fn_p): Check it. (enclosing_instantiation_of): Use it. Added: trunk/gcc/testsuite/g++.dg/cpp1z/constexpr-if26.C Modified: trunk/gcc/cp/ChangeLog trunk/gcc/cp/cp-tree.h trunk/gcc/cp/pt.c
