https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98441
--- Comment #4 from Daniel Santos <daniel.santos at pobox dot com> --- Created attachment 49850 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49850&action=edit Gentoo gcc 10.2.0-r2 patches (In reply to Jonathan Wakely from comment #3) > (In reply to Daniel Santos from comment #0) > > However, it builds on GCC 9 and is alleged to build on MSVC. The above > > example is simplified from the original sources: > > Are you sure this fails with 10.2.0? I only see it fail with 11.0 and not > gcc version 10.2.1 20201125 (but I didn't try a newer build from the gcc-10 > branch). Well, yes, but this is Gentoo gcc-10.2.0-r2, so includes a patchset (attached). In that, 34_all_fundecl-ICE-PR95820.patch contains the following: It's an unofficial backport of PR95820 where gcc ICEs on invalid syntax. As creduce frequently end up in these ICEs as in #730406 let's backport it to gcc-10. https://gcc.gnu.org/PR95820 https://bugs.gentoo.org/730406 --- a/gcc/cp/decl.c +++ b/gcc/cp/decl.c @@ -12029,14 +12029,11 @@ grokdeclarator (const cp_declarator *declarator, /* Handle a late-specified return type. */ tree late_return_type = declarator->u.function.late_return_type; - if (funcdecl_p - /* This is the case e.g. for - using T = auto () -> int. */ - || inner_declarator == NULL) + if (true) { if (tree auto_node = type_uses_auto (type)) { - if (!late_return_type) + if (!late_return_type && funcdecl_p) { if (current_class_type && LAMBDA_TYPE_P (current_class_type))
