diff --git a/src/channel.c b/src/channel.c
index 3664e525ba..92f775c023 100644
--- a/src/channel.c
+++ b/src/channel.c
@@ -1450,6 +1450,7 @@ channel_write_new_lines(buf_T *buf)
 
 /*
  * Invoke the "callback" on channel "channel".
+ * This does not redraw but sets channel_need_redraw;
  */
     static void
 invoke_callback(channel_T *channel, char_u *callback, partial_T *partial,
@@ -1464,8 +1465,7 @@ invoke_callback(channel_T *channel, char_u *callback, partial_T *partial,
     call_func(callback, (int)STRLEN(callback),
 			&rettv, 2, argv, 0L, 0L, &dummy, TRUE, partial, NULL);
     clear_tv(&rettv);
-
-    redraw_after_callback();
+    channel_need_redraw = TRUE;
 }
 
 /*
@@ -2028,6 +2028,10 @@ channel_exe_cmd(channel_T *channel, int part, typval_T *argv)
     }
 }
 
+/*
+ * Invoke the callback at "cbhead".
+ * Does not redraw but sets channel_need_redraw.
+ */
     static void
 invoke_one_time_callback(
 	channel_T   *channel,
@@ -2118,6 +2122,7 @@ append_to_buffer(buf_T *buffer, char_u *msg, channel_T *channel)
 
 /*
  * Invoke a callback for "channel"/"part" if needed.
+ * This does not redraw but sets channel_need_redraw when redraw is needed.
  * Return TRUE when a message was handled, there might be another one.
  */
     static int
@@ -3487,13 +3492,10 @@ channel_parse_messages(void)
 	}
     }
 
-    if (channel_need_redraw && must_redraw)
+    if (channel_need_redraw)
     {
 	channel_need_redraw = FALSE;
-	update_screen(0);
-	setcursor();
-	cursor_on();
-	out_flush();
+	redraw_after_callback();
     }
 
     return ret;
diff --git a/src/quickfix.c b/src/quickfix.c
index 00762bda45..510d8ddcb2 100644
--- a/src/quickfix.c
+++ b/src/quickfix.c
@@ -126,7 +126,7 @@ static int	qf_win_pos_update(qf_info_T *qi, int old_qf_index);
 static int	is_qf_win(win_T *win, qf_info_T *qi);
 static win_T	*qf_find_win(qf_info_T *qi);
 static buf_T	*qf_find_buf(qf_info_T *qi);
-static void	qf_update_buffer(qf_info_T *qi);
+static void	qf_update_buffer(qf_info_T *qi, int update_cursor);
 static void	qf_set_title_var(qf_info_T *qi);
 static void	qf_fill_buffer(qf_info_T *qi);
 #endif
@@ -880,7 +880,7 @@ qf_init_end:
     vim_free(fmtstr);
 
 #ifdef FEAT_WINDOWS
-    qf_update_buffer(qi);
+    qf_update_buffer(qi, TRUE);
 #endif
 
     return retval;
@@ -2176,7 +2176,7 @@ qf_msg(qf_info_T *qi)
 	    qi->qf_curlist + 1, qi->qf_listcount,
 	    qi->qf_lists[qi->qf_curlist].qf_count);
 #ifdef FEAT_WINDOWS
-    qf_update_buffer(qi);
+    qf_update_buffer(qi, TRUE);
 #endif
 }
 
@@ -2606,7 +2606,7 @@ qf_find_buf(qf_info_T *qi)
  * Find the quickfix buffer.  If it exists, update the contents.
  */
     static void
-qf_update_buffer(qf_info_T *qi)
+qf_update_buffer(qf_info_T *qi, int update_cursor)
 {
     buf_T	*buf;
     win_T	*win;
@@ -2633,7 +2633,8 @@ qf_update_buffer(qf_info_T *qi)
 	/* restore curwin/curbuf and a few other things */
 	aucmd_restbuf(&aco);
 
-	(void)qf_win_pos_update(qi, 0);
+	if (update_cursor)
+	    (void)qf_win_pos_update(qi, 0);
     }
 }
 
@@ -3675,7 +3676,7 @@ ex_vimgrep(exarg_T *eap)
     qi->qf_lists[qi->qf_curlist].qf_index = 1;
 
 #ifdef FEAT_WINDOWS
-    qf_update_buffer(qi);
+    qf_update_buffer(qi, TRUE);
 #endif
 
 #ifdef FEAT_AUTOCMD
@@ -4115,12 +4116,16 @@ set_errorlist(
 	qi->qf_lists[qi->qf_curlist].qf_nonevalid = TRUE;
     else
 	qi->qf_lists[qi->qf_curlist].qf_nonevalid = FALSE;
-    qi->qf_lists[qi->qf_curlist].qf_ptr = qi->qf_lists[qi->qf_curlist].qf_start;
-    if (qi->qf_lists[qi->qf_curlist].qf_count > 0)
-	qi->qf_lists[qi->qf_curlist].qf_index = 1;
+    if (action != 'a') {
+	qi->qf_lists[qi->qf_curlist].qf_ptr =
+	    qi->qf_lists[qi->qf_curlist].qf_start;
+	if (qi->qf_lists[qi->qf_curlist].qf_count > 0)
+	    qi->qf_lists[qi->qf_curlist].qf_index = 1;
+    }
 
 #ifdef FEAT_WINDOWS
-    qf_update_buffer(qi);
+    /* Don't update the cursor in quickfix window when appending entries */
+    qf_update_buffer(qi, (action != 'a'));
 #endif
 
     return retval;
@@ -4427,7 +4432,7 @@ ex_helpgrep(exarg_T *eap)
 	free_string_option(save_cpo);
 
 #ifdef FEAT_WINDOWS
-    qf_update_buffer(qi);
+    qf_update_buffer(qi, TRUE);
 #endif
 
 #ifdef FEAT_AUTOCMD
diff --git a/src/tag.c b/src/tag.c
index 4224c6fc25..8f4495ee2c 100644
--- a/src/tag.c
+++ b/src/tag.c
@@ -200,6 +200,14 @@ do_tag(
     {
 	use_tagstack = FALSE;
 	new_tag = TRUE;
+#if defined(FEAT_WINDOWS) && defined(FEAT_QUICKFIX)
+	if (g_do_tagpreview != 0)
+	{
+	    vim_free(ptag_entry.tagname);
+	    if ((ptag_entry.tagname = vim_strsave(tag)) == NULL)
+		goto end_do_tag;
+	}
+#endif
     }
     else
     {
diff --git a/src/testdir/test_alot.vim b/src/testdir/test_alot.vim
index 5637a8e0c3..cb377716b5 100644
--- a/src/testdir/test_alot.vim
+++ b/src/testdir/test_alot.vim
@@ -27,6 +27,7 @@ source test_sort.vim
 source test_statusline.vim
 source test_syn_attr.vim
 source test_tabline.vim
+source test_tagjump.vim
 source test_timers.vim
 source test_undolevels.vim
 source test_unlet.vim
diff --git a/src/testdir/test_quickfix.vim b/src/testdir/test_quickfix.vim
index 8da1b6fff4..17b07630f9 100644
--- a/src/testdir/test_quickfix.vim
+++ b/src/testdir/test_quickfix.vim
@@ -697,3 +697,51 @@ func Test_cgetexpr_works()
   " this must not crash Vim
   cgetexpr [$x]
 endfunc
+
+" Tests for the setqflist() and setloclist() functions
+function SetXlistTests(cchar, bnum)
+  if a:cchar == 'c'
+    let Xsetlist = function('setqflist')
+    let Xgetlist = function('getqflist')
+    let Xnext = 'cnext'
+  else
+    let Xsetlist = function('setloclist', [0])
+    let Xgetlist = function('getloclist', [0])
+    let Xnext = 'lnext'
+  endif
+
+  call Xsetlist([{'bufnr': a:bnum, 'lnum': 1},
+	      \  {'bufnr': a:bnum, 'lnum': 2}])
+  let l = Xgetlist()
+  call assert_equal(2, len(l))
+  call assert_equal(2, l[1].lnum)
+
+  exe Xnext
+  call Xsetlist([{'bufnr': a:bnum, 'lnum': 3}], 'a')
+  let l = Xgetlist()
+  call assert_equal(3, len(l))
+  exe Xnext
+  call assert_equal(3, line('.'))
+
+  call Xsetlist([{'bufnr': a:bnum, 'lnum': 3},
+	      \  {'bufnr': a:bnum, 'lnum': 4},
+	      \  {'bufnr': a:bnum, 'lnum': 5}], 'r')
+  let l = Xgetlist()
+  call assert_equal(3, len(l))
+  call assert_equal(5, l[2].lnum)
+
+  call Xsetlist([])
+  let l = Xgetlist()
+  call assert_equal(0, len(l))
+endfunction
+
+function Test_setqflist()
+  new Xtestfile | only
+  let bnum = bufnr('%')
+  call setline(1, range(1,5))
+
+  call SetXlistTests('c', bnum)
+  call SetXlistTests('l', bnum)
+
+  call delete('Xtestfile')
+endfunction
diff --git a/src/testdir/test_tagjump.vim b/src/testdir/test_tagjump.vim
new file mode 100644
index 0000000000..d8a333f44c
--- /dev/null
+++ b/src/testdir/test_tagjump.vim
@@ -0,0 +1,9 @@
+" Tests for tagjump (tags and special searches)
+
+" SEGV occurs in older versions.  (At least 7.4.1748 or older)
+func Test_ptag_with_notagstack()
+  set notagstack
+  call assert_fails('ptag does_not_exist_tag_name', 'E426')
+  set tagstack&vim
+endfunc
+" vim: sw=2 et
diff --git a/src/version.c b/src/version.c
index 94153c16a8..b03d6d6e44 100644
--- a/src/version.c
+++ b/src/version.c
@@ -763,6 +763,12 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1752,
+/**/
+    1751,
+/**/
+    1750,
 /**/
     1749,
 /**/