updated for version 7.4.027

Problem:    Another valgrind error when using CTRL-X CTRL-F at the start of
	    the line. (Dominique Pelle)
Solution:   Don't call mb_ptr_back() at the start of the line.  Add a test.

Author: brammool

src/edit.c

@@ -5183,15 +5183,19 @@ ins_complete(c)
 	}
 	else if (ctrl_x_mode == CTRL_X_FILES)
 	{
-	    char_u	*p = line + startcol;
-
 	    /* Go back to just before the first filename character. */
-	    mb_ptr_back(line, p);
-	    while (p > line && vim_isfilec(PTR2CHAR(p)))
+	    if (startcol > 0)
+	    {
+		char_u	*p = line + startcol;
+
 		mb_ptr_back(line, p);
-	    startcol = (int)(p - line) + 1;
-	    if (p == line && vim_isfilec(PTR2CHAR(p)))
-		startcol = 0;
+		while (p > line && vim_isfilec(PTR2CHAR(p)))
+		    mb_ptr_back(line, p);
+		if (p == line && vim_isfilec(PTR2CHAR(p)))
+		    startcol = 0;
+		else
+		    startcol = (int)(p - line) + 1;
+	    }
 
 	    compl_col += startcol;
 	    compl_length = (int)curs_col - startcol;

src/testdir/test32.in

@@ -36,6 +36,9 @@ kOM
 :w Xtest11.one
 :w Xtest11.two
 OIXA
+:" use CTRL-X CTRL-F to complete Xtest11.one, remove it and then use
+:" CTRL-X CTRL-F again to verify this doesn't cause trouble.
+OXddk
 :se cpt=w
 OST
 :se cpt=u nohid

src/version.c

@@ -738,6 +738,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    27,
 /**/
     26,
 /**/