re PR c++/35007 (Firefox fails to build with affentry.cpp:94: error: ISO C++…

re PR c++/35007 (Firefox fails to build with affentry.cpp:94: error: ISO C++ forbids subscripting non-lvalue array)

        PR c++/35007
        * class.c (build_base_path): Fix !want_pointer case.

From-SVN: r131931

gcc/cp/ChangeLog

+2008-01-28  Jason Merrill  <jason@redhat.com>
+
+	PR c++/35007
+	* class.c (build_base_path): Fix !want_pointer case.
+
 2008-01-27  Jason Merrill  <jason@redhat.com>
 
 	PR c++/27177

gcc/cp/class.c

@@ -296,7 +296,12 @@ build_base_path (enum tree_code code,
   /* Don't bother with the calculations inside sizeof; they'll ICE if the
      source type is incomplete and the pointer value doesn't matter.  */
   if (skip_evaluation)
-    return build_nop (build_pointer_type (target_type), expr);
+    {
+      expr = build_nop (build_pointer_type (target_type), expr);
+      if (!want_pointer)
+	expr = build_indirect_ref (expr, NULL);
+      return expr;
+    }
 
   /* Do we need to check for a null pointer?  */
   if (want_pointer && !nonnull)

gcc/testsuite/g++.dg/inherit/sizeof1.C

+// PR c++/35007
+
+struct AffEntry
+{
+  union {
+    char base[256];
+  } conds;
+};
+
+struct PfxEntry
+: public AffEntry
+{
+  PfxEntry()
+  {
+    sizeof(conds.base[0]);
+  }
+};