commit 5a030a540f4157d5c9905e3564282c92b4dcec9a
author Bram Moolenaar <Bram@vim.org> Thu Dec 01 17:48:29 2016 +0100
committer Bram Moolenaar <Bram@vim.org> Thu Dec 01 17:48:29 2016 +0100
tree aed80b43f0c4fed9445a8a8a11d2896e57c8977b
parent b129a447f3b580d4c941869672b0557c52c37e4d

patch 8.0.0110
Problem:    Drop command doesn't use existing window.
Solution:   Check the window width properly. (Hirohito Higashi)

src/buffer.c

diff --git a/src/buffer.c b/src/buffer.c
index e5d2dde..e77fc04 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -4858,8 +4858,8 @@
 	    wpnext = wp->w_next;
 	    buf = wp->w_buffer;
 	    if (buf->b_ffname == NULL
-		    || (!keep_tabs && buf->b_nwindows > 1)
-		    || wp->w_width != Columns)
+		    || (!keep_tabs && (buf->b_nwindows > 1
+			    || wp->w_width != Columns)))
 		i = opened_len;
 	    else
 	    {

src/testdir/test_tabpage.vim

diff --git a/src/testdir/test_tabpage.vim b/src/testdir/test_tabpage.vim
index 3f69fb9..1720107 100644
--- a/src/testdir/test_tabpage.vim
+++ b/src/testdir/test_tabpage.vim
@@ -65,6 +65,15 @@
     call assert_true(tabpagenr() == 2 && tabpagewinnr(2, '$') == 2 && tabpagewinnr(2) == 1)
     tabclose
     q
+    "
+    "
+    " Test for ":tab drop vertical-split-window" to jump test1 buffer
+    tabedit test1
+    vnew
+    tabfirst
+    tab drop test1
+    call assert_equal([2, 2, 2, 2], [tabpagenr('$'), tabpagenr(), tabpagewinnr(2, '$'), tabpagewinnr(2)])
+    1tabonly
   endif
   "
   "

src/version.c

diff --git a/src/version.c b/src/version.c
index e234f86..c9fc572 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    110,
+/**/
     109,
 /**/
     108,