https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70297
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|debug |c
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
So duplicate_decls ggc_free()s newdecl which is still used as TYPE_NAME.
#1 0x000000000075a2fe in duplicate_decls (
newdecl=<type_decl 0x7ffff68abda8 target_ulong>,
olddecl=<type_decl 0x7ffff68abd10 target_ulong>)
at /space/rguenther/src/svn/trunk3/gcc/c/c-decl.c:2731
2731 ggc_free (newdecl);
(gdb) p olddecl->typed.type
$13 = <integer_type 0x7ffff698b540 target_ulong>
(gdb) p olddecl->typed.type->type_common.name
$14 = <type_decl 0x7ffff68abda8 target_ulong>
(gdb) p newdecl
$15 = <type_decl 0x7ffff68abda8 target_ulong>
C frontend issue. merge_decls copies everything from new to old, including
type which can self-reference new.
