re PR c++/10635 (ICE (segfault) when dereferencing an incomplete type casted from a void pointer)

	PR c++/10635
	* typeck.c (build_c_cast): Check that the destination type is
	complete.

	PR c++/10635
	* g++.dg/expr/cast1.C: New test.

[[Split portion of a mixed commit.]]

From-SVN: r67840.2

gcc/cp/ChangeLog

+2003-06-12  Mark Mitchell  <mark@codesourcery.com>
+
+	PR c++/10635
+	* typeck.c (build_c_cast): Check that the destination type is
+	complete.
+
 2003-06-11  Mark Mitchell  <mark@codesourcery.com>
 
 	PR c++/10432

gcc/cp/typeck.c

@@ -5189,6 +5189,10 @@ build_c_cast (type, expr)
       value = convert_to_void (value, /*implicit=*/NULL);
       return value;
     }
+
+  if (!complete_type_or_else (type, NULL_TREE))
+    return error_mark_node;
+
   /* Convert functions and arrays to pointers and
      convert references to their expanded types,
      but don't convert any other types.  If, however, we are

gcc/testsuite/ChangeLog

+2003-06-12  Mark Mitchell  <mark@codesourcery.com>
+
+	PR c++/10635
+	* g++.dg/expr/cast1.C: New test.
+
 2003-06-12  Roger Sayle  <roger@eyesopen.com>
 
 	* gcc.dg/builtins-21.c: New test case.

gcc/testsuite/g++.dg/expr/cast1.C

+struct S; // { dg-error "forward" } 
+
+void f(S* p) { ((S) (*p)); } // { dg-error "" }