https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84036
Benjamin Buch <benni.buch at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|RESOLVED |REOPENED Resolution|FIXED |--- --- Comment #7 from Benjamin Buch <benni.buch at gmail dot com> --- I have to reopen this with an extended test case. Its still an ICE as soon as I access the captured pack: template < typename T > void sink(T ...){} template < typename T > auto f(T){ [](auto ... i){ [i ...]{ sink(i ...); }; }; } int main(){ f(0); } $ g++ -std=c++14 main2.cpp main2.cpp: In instantiation of 'auto f(T) [with T = int]': main2.cpp:11:5: required from here main2.cpp:6:16: internal compiler error: in retrieve_specialization, at cp/pt.c:1191 [i ...]{ sink(i ...); }; ~~~~^~~~~~~ 0x603f91 retrieve_specialization ../../gcc/gcc/cp/pt.c:1188 0x942e53 tsubst_pack_expansion(tree_node*, tree_node*, int, tree_node*) ../../gcc/gcc/cp/pt.c:11524 0x927dcd tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool, bool) ../../gcc/gcc/cp/pt.c:17684 0x934e29 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool, bool) ../../gcc/gcc/cp/pt.c:17100 0x934e29 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool) ../../gcc/gcc/cp/pt.c:16838 0x933950 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool) ../../gcc/gcc/cp/pt.c:16059 0x931f41 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool) ../../gcc/gcc/cp/pt.c:16322 0x932751 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool) ../../gcc/gcc/cp/pt.c:16045 0x931f41 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool) ../../gcc/gcc/cp/pt.c:16322 0x925b7b tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool) ../../gcc/gcc/cp/pt.c:16030 0x925b7b tsubst_lambda_expr(tree_node*, tree_node*, int, tree_node*) ../../gcc/gcc/cp/pt.c:17056 0x927478 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool, bool) ../../gcc/gcc/cp/pt.c:18346 0x934e29 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool, bool) ../../gcc/gcc/cp/pt.c:17100 0x934e29 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool) ../../gcc/gcc/cp/pt.c:16838 0x933950 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool) ../../gcc/gcc/cp/pt.c:16059 0x932751 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool) ../../gcc/gcc/cp/pt.c:16045 0x931f41 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool) ../../gcc/gcc/cp/pt.c:16322 0x931f41 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool) ../../gcc/gcc/cp/pt.c:16322 0x925b7b tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool) ../../gcc/gcc/cp/pt.c:16030 0x925b7b tsubst_lambda_expr(tree_node*, tree_node*, int, tree_node*) ../../gcc/gcc/cp/pt.c:17056 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions. $ g++ --version g++ (GCC) 8.0.1 20180202 (experimental) Copyright (C) 2018 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.