Index: Python/symtable.c
===================================================================
--- Python/symtable.c	(revision 70632)
+++ Python/symtable.c	(working copy)
@@ -476,7 +476,8 @@
 	char buf[300];
 	const char* trailer;
 
-	if (ste->ste_type != FunctionBlock || !ste->ste_unoptimized
+	if ((ste->ste_type != FunctionBlock && ste->ste_type != ClassBlock)
+      || !ste->ste_unoptimized
 	    || !(ste->ste_free || ste->ste_child_free))
 		return 1;
 
Index: Lib/test/test_compile.py
===================================================================
--- Lib/test/test_compile.py	(revision 70632)
+++ Lib/test/test_compile.py	(working copy)
@@ -460,6 +460,20 @@
         ast.body = [_ast.BoolOp()]
         self.assertRaises(TypeError, compile, ast, '<ast>', 'exec')
 
+    def test_exec_inside_class(self):
+        source = """if 1:
+        def f():
+            a = 2
+            class C:
+                exec 'a = 42'
+                abc = a
+"""
+        try:
+            exec source
+        except SyntaxError:
+            pass
+        else:
+            raise Exception("DID NOT RAISE")
 
 def test_main():
     test_support.run_unittest(TestSpecifics)