https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126680
Bug ID: 126680
Summary: ICE: in set_decl_context_in_fn, at
cp/name-lookup.cc:3675
Product: gcc
Version: 17.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: eczbek.void at gmail dot com
Target Milestone: ---
https://godbolt.org/z/haEcW78as
```
#include <array>
template<int = 0>
void f() {
static constexpr auto [...a] = std::array { ^^int };
}
int main() {
f();
}
```
```
<source>: In instantiation of 'void f() [with int <anonymous> = 0]':
<source>:9:3: required from here
9 | f();
| ~^~
<source>:5:31: internal compiler error: in set_decl_context_in_fn, at
cp/name-lookup.cc:3675
5 | static constexpr auto [...a] = std::array { ^^int };
| ^~~~~~
0x2b8ff08 diagnostics::context::diagnostic_impl(rich_location*,
diagnostics::metadata const*, diagnostics::option_id, char const*,
__va_list_tag (*) [1], diagnostics::kind)
???:0
0x2b84b4b internal_error(char const*, ...)
???:0
0xb3f80c fancy_abort(char const*, int, char const*)
???:0
0xc4ddb9 cp_finish_decomp(tree_node*, cp_decomp*, bool)
???:0
0xc513ec cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int,
cp_decomp*)
???:0
0xdf9f7d instantiate_decl(tree_node*, bool, bool)
???:0
0xe03dfa instantiate_pending_templates(int)
???:0
0xc65d18 c_parse_final_cleanups()
???:0
0xf282b8 c_common_parse_file()
???:0
/cefs/71/7162170c670fadfdb1a6fa5f_gcc-trunk-20260806/bin/../libexec/gcc/x86_64-linux-gnu/17.0.0/cc1plus
-quiet -imultiarch x86_64-linux-gnu -iprefix
/cefs/71/7162170c670fadfdb1a6fa5f_gcc-trunk-20260806/bin/../lib/gcc/x86_64-linux-gnu/17.0.0/
-D_GNU_SOURCE <source> -quiet -dumpdir /app/ -dumpbase output.cpp -dumpbase-ext
.cpp -masm=intel -mtune=generic -march=x86-64 -g -std=c++26
-fdiagnostics-color=always -fno-verbose-asm -freflection -o /app/output.s
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
```
