Patch #1550800: make exec a function.
diff --git a/Lib/timeit.py b/Lib/timeit.py
index 8c0f7a5..190b8c5 100644
--- a/Lib/timeit.py
+++ b/Lib/timeit.py
@@ -115,7 +115,7 @@
         self.src = src # Save for traceback display
         code = compile(src, dummy_src_name, "exec")
         ns = {}
-        exec code in globals(), ns
+        exec(code, globals(), ns)
         self.inner = ns["inner"]
 
     def print_exc(self, file=None):