https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120129
Bug ID: 120129
Summary: Internal Compiler Error (ICE) with decltype(auto) and
nested initializer list
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: mario.rodriguezb1 at um dot es
Target Milestone: ---
Using decltype(auto) to initialize from a nested initializer list causes an
internal compiler error in GCC.
```
#include <iostream>
int main(int, char**)
{
decltype(auto) m = {{"john", "doe"}};
}
```
```
<source>:4:38: internal compiler error: in convert_like_internal, at
cp/call.cc:8874
4 | decltype(auto) m = {{"john", "doe"}};
| ^
0x293a4f5 diagnostic_context::diagnostic_impl(rich_location*,
diagnostic_metadata const*, diagnostic_option_id, char const*, __va_list_tag
(*) [1], diagnostic_t)
???:0
0x2951766 internal_error(char const*, ...)
???:0
0xad7334 fancy_abort(char const*, int, char const*)
???:0
0xb03073 perform_implicit_conversion_flags(tree_node*, tree_node*, int, int)
???:0
0xbd0b9e cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int,
cp_decomp*)
???:0
0xcfb063 c_parse_file()
???:0
0xe5db29 c_common_parse_file()
???:0
```
It happens since 11.3 until trunk version included.
https://gcc.godbolt.org/z/v4jbn8Pfe
