https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91855
--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
"What we need
Please include all of the following items, the first three of which can be
obtained from the output of gcc -v:
the exact version of GCC;
the system type;
the options given when GCC was configured/built;
the complete command line that triggers the bug;
the compiler output (error messages, warnings, etc.); and
the preprocessed file (*.i*) that triggers the bug, generated by adding
-save-temps to the complete compilation command, or, in the case of a bug
report for the GNAT front end, a complete set of source files (see below)."