https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121864
--- Comment #1 from Sam James <sjames at gcc dot gnu.org> ---
Dunno why my workstation lost backtraces but whatever, an issue for another
time. Here it is from another machine:
```
in pp_string, at pretty-print.cc:2640
1 | # 0 "a.ii"
0x55c544b42e1a internal_error(char const*, ...)
/usr/src/debug/sys-devel/gcc-16.0.9999/gcc-16.0.9999/gcc/diagnostic-global-context.cc:786
0x55c544b42fbd fancy_abort(char const*, int, char const*)
/usr/src/debug/sys-devel/gcc-16.0.9999/gcc-16.0.9999/gcc/diagnostics/context.cc:1787
0x55c542f81d60 pp_string(pretty_printer*, char const*)
/usr/src/debug/sys-devel/gcc-16.0.9999/gcc-16.0.9999/gcc/pretty-print.cc:2640
0x55c542f81cf7 pp_string(pretty_printer*, char const*)
/usr/src/debug/sys-devel/gcc-16.0.9999/gcc-16.0.9999/gcc/pretty-print.cc:1148
0x55c5456a86f5 format_phase_2
/usr/src/debug/sys-devel/gcc-16.0.9999/gcc-16.0.9999/gcc/pretty-print.cc:2044
0x55c5456a86f5 pretty_printer::format(text_info&)
/usr/src/debug/sys-devel/gcc-16.0.9999/gcc-16.0.9999/gcc/pretty-print.cc:1720
0x55c544bef894 pp_format(pretty_printer*, text_info*)
/usr/src/debug/sys-devel/gcc-16.0.9999/gcc-16.0.9999/gcc/pretty-print.h:599
0x55c544bef894
diagnostics::context::report_diagnostic(diagnostics::diagnostic_info*)
/usr/src/debug/sys-devel/gcc-16.0.9999/gcc-16.0.9999/gcc/diagnostics/context.cc:1503
0x55c544bef26c diagnostics::context::diagnostic_impl(rich_location*,
diagnostics::metadata const*, diagnostics::option_id, char const*,
__va_list_tag (*) [1], diagnostics::kind) [clone .constprop.0]
/usr/src/debug/sys-devel/gcc-16.0.9999/gcc-16.0.9999/gcc/diagnostics/context.cc:1663
0x55c542f8bc8c fatal_error(unsigned long, char const*, ...)
/usr/src/debug/sys-devel/gcc-16.0.9999/gcc-16.0.9999/gcc/diagnostic-global-context.cc:765
0x55c542febf77 c_common_finish()
/usr/src/debug/sys-devel/gcc-16.0.9999/gcc-16.0.9999/gcc/c-family/c-opts.cc:1478
0x55c5456aa836 finalize
/usr/src/debug/sys-devel/gcc-16.0.9999/gcc-16.0.9999/gcc/toplev.cc:2128
0x55c5456aa836 do_compile
/usr/src/debug/sys-devel/gcc-16.0.9999/gcc-16.0.9999/gcc/toplev.cc:2235
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://bugs.gentoo.org/> for instructions.
```
