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Subject: Re: [C++ RFC / Patch] Again about PR 70202
To: Jason Merrill <jason@redhat.com>
References: <5759A0FB.2050703@oracle.com> <CADzB+2m=+LHPwJSaZdVL1T+Pr+z9kdSBrN0OQY=eJX0sZrhNzw@mail.gmail.com> <5759FBC7.5080503@oracle.com> <575A1B49.1040702@oracle.com> <CADzB+2nPhiBWPCkNiieaj++YH82Rg=wgvQ4oHrFZPxnNh128kw@mail.gmail.com> <575B2372.6020806@oracle.com> <575B2431.4030904@oracle.com>
Cc: "gcc-patches@gcc.gnu.org" <gcc-patches@gcc.gnu.org>
From: Paolo Carlini <paolo.carlini@oracle.com>
Message-ID: <575B277C.7020806@oracle.com>
Date: Fri, 10 Jun 2016 20:48:00 -0000
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.. if I disregard that comment, the incomplete type B gets through, 
gets to check_initializer (which is involved anyway even if there is no 
initializer in this case for b1) and somewhat comically gets to:

   else if (!COMPLETE_TYPE_P (type))
     {
       error_at (DECL_SOURCE_LOCATION (decl),
         "%q#D has incomplete type", decl);
       TREE_TYPE (decl) = error_mark_node;
       return NULL_TREE;
     }

thus we get a duplicate diagnostic about incompleteness and the type is 
turned into error_mark_node anyway ;)

Paolo.