[Bug c++/100003] internal compiler error: in merge_exception_specifiers

[mpolacek at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100003

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
The problem is that, when we're in a system header,
check_redeclaration_exception_specification doesn't emit an error:

 1242       if (DECL_IN_SYSTEM_HEADER (old_decl))
 1243         complained = pedwarn (new_loc, OPT_Wsystem_headers, msg,
new_decl);

so then we crash here:

2420   gcc_checking_assert (!TREE_PURPOSE (add)
2421                        || errorcount || !flag_exceptions
2422                        || cp_tree_equal (noex, TREE_PURPOSE (add)));