https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65323
Kai Tietz <ktietz at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ktietz at gcc dot gnu.org
--- Comment #3 from Kai Tietz <ktietz at gcc dot gnu.org> ---
Hmm, the issue seems to be that we emit within check_default_argument () two
times the call to maybe_warn_zero_as_null_pointer_constant (). Once indirectly
via perform_implicit_conversion_flags () call, and then later on directly
within if-condition for returning nullptr_node.
It seems that second call is superflous in terms of warning. So I suggest the
following patch:
Index: decl.c
===================================================================
--- decl.c (Revision 221277)
+++ decl.c (Arbeitskopie)
@@ -11231,7 +11233,8 @@ check_default_argument (tree decl, tree arg, tsub
&& TYPE_PTR_OR_PTRMEM_P (decl_type)
&& null_ptr_cst_p (arg)
&& (complain & tf_warning)
- && maybe_warn_zero_as_null_pointer_constant (arg, input_location))
+ && c_inhibit_evaluation_warnings == 0
+ && !NULLPTR_TYPE_P(TREE_TYPE (arg)))
return nullptr_node;
/* [dcl.fct.default]
