patch 7.4.1513

Problem:    "J" fails if there are not enough lines. (Christian Neukirchen)
Solution:   Reduce the count, only fail on the last line.

src/normal.c

@@ -9213,15 +9213,22 @@ nv_join(cmdarg_T *cap)
 	    cap->count0 = 2;	    /* default for join is two lines! */
 	if (curwin->w_cursor.lnum + cap->count0 - 1 >
 						   curbuf->b_ml.ml_line_count)
-	    clearopbeep(cap->oap);  /* beyond last line */
-	else
 	{
+	    /* can't join when on the last line */
+	    if (cap->count0 <= 2)
+	    {
+		clearopbeep(cap->oap);
+		return;
+	    }
+	    cap->count0 = curbuf->b_ml.ml_line_count
+						  - curwin->w_cursor.lnum + 1;
+	}
+
 	prep_redo(cap->oap->regname, cap->count0,
 				     NUL, cap->cmdchar, NUL, NUL, cap->nchar);
 	(void)do_join(cap->count0, cap->nchar == NUL, TRUE, TRUE, TRUE);
     }
 }
-}
 
 /*
  * "P", "gP", "p" and "gp" commands.

src/testdir/test_alot.vim

@@ -6,6 +6,7 @@ source test_cursor_func.vim
 source test_delete.vim
 source test_expand.vim
 source test_glob2regpat.vim
+source test_join.vim
 source test_lispwords.vim
 source test_menu.vim
 source test_reltime.vim

src/testdir/test_join.vim

@@ -0,0 +1,13 @@
+" Test for joining lines.
+
+func Test_join_with_count()
+  new
+  call setline(1, ['one', 'two', 'three', 'four'])
+  normal J
+  call assert_equal('one two', getline(1))
+  %del
+  call setline(1, ['one', 'two', 'three', 'four'])
+  normal 10J
+  call assert_equal('one two three four', getline(1))
+  quit!
+endfunc

src/version.c

@@ -743,6 +743,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1513,
 /**/
     1512,
 /**/