https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88294
Bug ID: 88294 Summary: ICE on (invalid) C++11 code: in tsubst_copy, at cp/pt.c:15391 Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: su at cs dot ucdavis.edu Target Milestone: --- This appears to be a recent regression. $ g++tk -v Using built-in specs. COLLECT_GCC=g++tk COLLECT_LTO_WRAPPER=/home/su/software/tmp/gcc/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto --prefix=/home/su/software/tmp/gcc/gcc-trunk --disable-bootstrap Thread model: posix gcc version 9.0.0 20181201 (experimental) [trunk revision 266708] (GCC) $ $ $ g++tk tmp.cpp tmp.cpp: In instantiation of ‘void A< <template-parameter-1-1> >::g() [with <template-parameter-1-1> = int]’: tmp.cpp:10:8: required from here tmp.cpp:4:23: internal compiler error: in tsubst_copy, at cp/pt.c:15391 4 | void g () noexcept (f()) { } | ^ 0x85ab94 tsubst_copy ../../gcc-source-trunk/gcc/cp/pt.c:15391 0x846789 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool, bool) ../../gcc-source-trunk/gcc/cp/pt.c:19225 0x848248 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool, bool) ../../gcc-source-trunk/gcc/cp/pt.c:18180 0x8477d2 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool, bool) ../../gcc-source-trunk/gcc/cp/pt.c:18158 0x846a73 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool, bool) ../../gcc-source-trunk/gcc/cp/pt.c:19013 0x84944f tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool, bool) ../../gcc-source-trunk/gcc/cp/pt.c:18630 0x893289 maybe_instantiate_noexcept(tree_node*, int) ../../gcc-source-trunk/gcc/cp/pt.c:24017 0x7696d1 mark_used(tree_node*, int) ../../gcc-source-trunk/gcc/cp/decl2.c:5338 0x6a1b8b build_over_call ../../gcc-source-trunk/gcc/cp/call.c:8456 0x6b145a build_new_method_call_1 ../../gcc-source-trunk/gcc/cp/call.c:9677 0x6b145a build_new_method_call(tree_node*, tree_node*, vec<tree_node*, va_gc, vl_embed>**, tree_node*, int, tree_node**, int) ../../gcc-source-trunk/gcc/cp/call.c:9753 0x80bc37 cp_parser_postfix_expression ../../gcc-source-trunk/gcc/cp/parser.c:7274 0x7f196f cp_parser_unary_expression ../../gcc-source-trunk/gcc/cp/parser.c:8382 0x7ea9e2 cp_parser_cast_expression ../../gcc-source-trunk/gcc/cp/parser.c:9265 0x7eb0ff cp_parser_binary_expression ../../gcc-source-trunk/gcc/cp/parser.c:9366 0x7eba23 cp_parser_assignment_expression ../../gcc-source-trunk/gcc/cp/parser.c:9661 0x7ebcdc cp_parser_expression ../../gcc-source-trunk/gcc/cp/parser.c:9830 0x7f0235 cp_parser_expression_statement ../../gcc-source-trunk/gcc/cp/parser.c:11365 0x7fee21 cp_parser_statement ../../gcc-source-trunk/gcc/cp/parser.c:11161 0x80003f cp_parser_statement_seq_opt ../../gcc-source-trunk/gcc/cp/parser.c:11508 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. $ --------------------------------------- template < typename > struct A { constexpr int f () { return 0; } void g () noexcept (f()) { } }; int main () { A < int > a; a.g (); return 0; }