updated for version 7.3.150

Problem:    readline() does not return the last line when the NL is missing.
            (Hong Xu)
Solution:   When at the end of the file Also check for a previous line.

src/eval.c

@@ -14305,9 +14305,9 @@ f_readfile(argvars, rettv)
 	{
 	    if (buf[filtd] == '\n' || readlen <= 0)
 	    {
-		/* Only when in binary mode add an empty list item when the
-		 * last line ends in a '\n'. */
-		if (!binary && readlen == 0 && filtd == 0)
+		/* In binary mode add an empty list item when the last
+		 * non-empty line ends in a '\n'. */
+		if (!binary && readlen == 0 && filtd == 0 && prev == NULL)
 		    break;
 
 		/* Found end-of-line or end-of-file: add a text line to the
@@ -14371,6 +14371,8 @@ f_readfile(argvars, rettv)
 	    break;
 
 	if (tolist == 0)
+	{
+	    if (buflen >= FREAD_SIZE / 2)
 	    {
 		/* "buf" is full, need to move text to an allocated buffer */
 		if (prev == NULL)
@@ -14392,6 +14394,7 @@ f_readfile(argvars, rettv)
 		}
 		filtd = 0;
 	    }
+	}
 	else
 	{
 	    mch_memmove(buf, buf + tolist, buflen - tolist);

src/version.c

@@ -714,6 +714,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    150,
 /**/
     149,
 /**/