updated for version 7.4.573
Problem:    Mapping CTRL-C in Visual mode doesn't work. (Ingo Karkat)
Solution:   Call get_real_state() instead of using State directly.
diff --git a/src/testdir/test_mapping.ok b/src/testdir/test_mapping.ok
index cd0e2e1..bf21e51 100644
--- a/src/testdir/test_mapping.ok
+++ b/src/testdir/test_mapping.ok
@@ -2,5 +2,6 @@
 vim
 TEST2: CTRL-C |<ctrl-c>A|
 
+vmap works
 +
 +