[C++ Patch] PR 84636 ("internal compiler error: Segmentation fault (identifier_p()/grokdeclarator())")

[Paolo Carlini]

Hi,

On 19/11/18 23:24, Marek Polacek wrote:
> On Mon, Nov 19, 2018 at 08:03:24PM +0100, Paolo Carlini wrote:
>> @@ -12245,8 +12246,9 @@ grokdeclarator (const cp_declarator *declarator,
>>   	    error ("invalid use of %<::%>");
>>   	    return error_mark_node;
>>   	  }
>> -	else if (TREE_CODE (type) == FUNCTION_TYPE
>> -		 || TREE_CODE (type) == METHOD_TYPE)
>> +	else if ((TREE_CODE (type) == FUNCTION_TYPE
>> +		  || TREE_CODE (type) == METHOD_TYPE)
> I know it's preexisting but we have FUNC_OR_METHOD_TYPE_P for this.

Ah, thanks! I guess I didn't notice that because the macro is defined in 
tree.h. I adjusted my first patch and I'll send a separate one for all 
the remaining instances (many!) in a separate patch. Thanks again,

Paolo.

////////////////////////

-------------- next part --------------
Index: cp/decl.c
===================================================================
--- cp/decl.c	(revision 266268)
+++ cp/decl.c	(working copy)
@@ -12165,7 +12165,8 @@ grokdeclarator (const cp_declarator *declarator,
     }
 
   if (ctype && TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
-      && !(identifier_p (unqualified_id)
+      && !(unqualified_id
+	   && identifier_p (unqualified_id)
 	   && IDENTIFIER_NEWDEL_OP_P (unqualified_id)))
     {
       cp_cv_quals real_quals = memfn_quals;
@@ -12245,8 +12246,7 @@ grokdeclarator (const cp_declarator *declarator,
 	    error ("invalid use of %<::%>");
 	    return error_mark_node;
 	  }
-	else if (TREE_CODE (type) == FUNCTION_TYPE
-		 || TREE_CODE (type) == METHOD_TYPE)
+	else if (FUNC_OR_METHOD_TYPE_P (type) && !bitfield)
 	  {
 	    int publicp = 0;
 	    tree function_context;
Index: testsuite/g++.dg/parse/bitfield3.C
===================================================================
--- testsuite/g++.dg/parse/bitfield3.C	(revision 266263)
+++ testsuite/g++.dg/parse/bitfield3.C	(working copy)
@@ -5,5 +5,5 @@ typedef void (func_type)();
 
 struct A
 {
-  friend func_type f : 2; /* { dg-error "with non-integral type" } */
+  friend func_type f : 2; /* { dg-error "20:.f. is neither function nor member function" } */
 };
Index: testsuite/g++.dg/parse/bitfield6.C
===================================================================
--- testsuite/g++.dg/parse/bitfield6.C	(nonexistent)
+++ testsuite/g++.dg/parse/bitfield6.C	(working copy)
@@ -0,0 +1,6 @@
+// PR c++/84636
+
+typedef void a();
+struct A {
+a: 1;  // { dg-error "bit-field .\\<anonymous\\>. with non-integral type" }
+};