https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103885
Bug ID: 103885 Summary: ICE in capturing lambda for certain constexpr/auto combination Product: gcc Version: 11.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: cbcode at gmail dot com Target Milestone: --- ICE on the line indicated below. void test() { constexpr int N = 1; constexpr auto a1 = [](auto){ static_assert(N == 1); //OK return 2; }(3); constexpr auto a2 = [=](auto){ static_assert(N == 1); //OK return 2; }(3); constexpr auto a3 = [&](int){ static_assert(N == 1); //OK return 2; }(3); constexpr auto a4 = [&](auto){ static_assert(N == 1); //ICE in tsubst_copy, at cp/pt.c:16780 return 2; }(3); }