patch 7.4.2331
Problem:    Using CTRL-X CTRL-V to complete a command line from Insert mode
            does not work after entering an expression on the command line.
Solution:   Don't use "ccline" when not actually using a command line. (test
            by Hirohito Higashi)
diff --git a/src/edit.c b/src/edit.c
index 6d98582..a87c155 100644
--- a/src/edit.c
+++ b/src/edit.c
@@ -5304,7 +5304,7 @@
 	    if (compl_pattern == NULL)
 		return FAIL;
 	    set_cmd_context(&compl_xp, compl_pattern,
-				     (int)STRLEN(compl_pattern), curs_col);
+				  (int)STRLEN(compl_pattern), curs_col, FALSE);
 	    if (compl_xp.xp_context == EXPAND_UNSUCCESSFUL
 		    || compl_xp.xp_context == EXPAND_NOTHING)
 		/* No completion possible, use an empty pattern to get a