Re: Fix htab lookup bug in reregister_specialization (issue5190046)

[Jason Merrill <jason at redhat dot com>]

On 10/05/2011 04:05 PM, Jakub Jelinek wrote:
> BTW, register_specialization has the same problems.  If slot != NULL and fn
> == NULL, it can still return without storing non-NULL into *slot
> (when optimize_specialization_lookup_p (tmpl) returns non-zero).
> You can do else if (slot != NULL&&  fn == NULL) htab_clear_slot (decl_specializations, slot);

I don't think there's a problem in that function; if fn == NULL, then we 
store spec in its place.

> If you never insert, it should be htab_find only (with spec_entry * instead
> of spec_entry ** variable).

Makes sense.

Jason