On 03/06/2015 03:36 AM, Paolo Carlini wrote:
this is a regression about duplicate warnings with -Wzero-as-null-pointer-constant. The regression is rather old, affects 4_8-branch too, and started when check_default_argument got a perform_implicit_conversion_flags call which warns a first time, then maybe_warn_zero_as_null_pointer_constant as called by check_default_argument itself warns a second time. The latter call is even older, dates back to c++/52718, I think we can now safely remove it and keep on returning nullptr_node to avoid warning later still at the call sites (that was the point of c++/52718). Tested x86_64-linux.
Do we need this special handling at all? When I remove that whole 'if' block I still only get one warning from the 52718 testcase.
Jason
