https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87463
Bug ID: 87463
Summary: ICE in in tsubst_copy, at cp/pt.c:15513
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: larsbj at gullik dot net
Target Milestone: ---
Created attachment 44764
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44764&action=edit
Source file showing the problem
When I compile the attached code I get this ICE:
g++ -v
Using built-in specs.
COLLECT_GCC=/opt/gcc/gcc-9/bin/g++
COLLECT_LTO_WRAPPER=/opt/gcc/gcc-9/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/opt/gcc/gcc-9
--enable-checking=release --enable-languages=c,c++
Thread model: posix
gcc version 9.0.0 20180925 (experimental) (GCC)
g++ -c foo.cpp
foo.cpp: In instantiation of ‘void l() [with <template-parameter-1-1> = int]’:
foo.cpp:17:12: required from here
foo.cpp:12:5: internal compiler error: in tsubst_copy, at cp/pt.c:15513
12 | ""_a;
| ^~~~
0x59e988 tsubst_copy
../../gcc/gcc/cp/pt.c:15513
0x6d083f tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../gcc/gcc/cp/pt.c:19039
0x6cfa0c tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../gcc/gcc/cp/pt.c:18309
0x6c18dc tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc/gcc/cp/pt.c:17455
0x6c1602 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc/gcc/cp/pt.c:16650
0x6c0bc2 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc/gcc/cp/pt.c:16939
0x6db708 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc/gcc/cp/pt.c:16621
0x6db708 instantiate_decl(tree_node*, bool, bool)
../../gcc/gcc/cp/pt.c:24099
0x6ddbd3 instantiate_pending_templates(int)
../../gcc/gcc/cp/pt.c:24215
0x63fd80 c_parse_final_cleanups()
../../gcc/gcc/cp/decl2.c:4709
