https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124494
Bug ID: 124494
Summary: ICE when reflecting on a decltype
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: sdowney at gmail dot com
Target Milestone: ---
Code is ill-formed, but ICE is always a bug.
```
#include <meta>
#include <cstdint>
auto rr = ^^decltype(std::int8_t);
```
https://godbolt.org/z/ddnnxo5T3
results in
<source>:4:33: internal compiler error: Segmentation fault
4 | auto rr = ^^decltype(std::int8_t);
| ^
0x2263468 diagnostics::context::diagnostic_impl(rich_location*,
diagnostics::metadata const*, diagnostics::option_id, char const*,
__va_list_tag (*) [1], diagnostics::kind)
???:0
0x225c75b internal_error(char const*, ...)
???:0
0x9c584d c_parse_file()
???:0
0xaefd79 c_common_parse_file()
???:0
/cefs/80/8014cb6485fd2a75b5bc495b_gcc-trunk-20260313/bin/../libexec/gcc/x86_64-linux-gnu/16.0.1/cc1plus
-quiet -imultiarch x86_64-linux-gnu -iprefix
/cefs/80/8014cb6485fd2a75b5bc495b_gcc-trunk-20260313/bin/../lib/gcc/x86_64-linux-gnu/16.0.1/
-D_GNU_SOURCE <source> -quiet -dumpdir /app/ -dumpbase output.cpp -dumpbase-ext
.cpp -masm=intel -mtune=generic -march=x86-64 -g -std=gnu++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.
Compiler returned: 1
