https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118526
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Seems like it is stuck testing
any_template_arguments_need_structural_equality_p
#43 0x00000000017f72aa in walk_tree_without_duplicates_1
(tp=tp@entry=0x7fffffffbca8, func=func@entry=0xccbe00 <find_parm_usage_r(tree*,
int*, void*)>, data=data@entry=0x0,
lh=0xd702a0 <cp_walk_subtrees(tree_node**, int*, tree_node*
(*)(tree_node**, int*, void*), void*, hash_set<tree_node*, false,
default_hash_traits<tree_node*> >*)>) at
/home/apinski/src/upstream-gcc-isel/gcc/gcc/tree.cc:11792
#44 0x0000000000ce6836 in any_template_arguments_need_structural_equality_p
(args=0x7ffff2d48510) at
/home/apinski/src/upstream-gcc-isel/gcc/gcc/cp/pt.cc:29547
