re PR c++/55893 ([C++11] runtime segfault with static const object with virtual destructor)

	PR c++/55893
	* decl.c (cp_finish_decl): Clear TREE_READONLY if the variable
	needs destruction.

From-SVN: r195062

gcc/cp/ChangeLog

+2013-01-09  Jason Merrill  <jason@redhat.com>
+
+	PR c++/55893
+	* decl.c (cp_finish_decl): Clear TREE_READONLY if the variable
+	needs destruction.
+
 2013-01-09  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c/48418

gcc/cp/decl.c

@@ -6417,6 +6417,10 @@ cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
 	    }
 	  else if (was_readonly)
 	    TREE_READONLY (decl) = 1;
+
+	  /* Likewise if it needs destruction.  */
+	  if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
+	    TREE_READONLY (decl) = 0;
 	}
 
       make_rtl_for_nonlocal_decl (decl, init, asmspec);

gcc/testsuite/g++.dg/init/const9.C

+// PR c++/55893
+// { dg-final { scan-assembler-not "rodata" } }
+
+struct foo
+{
+  virtual ~foo ();
+};
+
+int main ()
+{
+  static const foo tmp;
+}