diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index 2551ff25c1..35c9dc1b1f 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -7008,7 +7008,8 @@ setqflist({list} [, {action}[, {what}]])		*setqflist()*
 		    title	quickfix list title text
 		Unsupported keys in {what} are ignored.
 		If the "nr" item is not present, then the current quickfix list
-		is modified.
+		is modified. When creating a new quickfix list, "nr" can be
+		set to a value one greater than the quickfix stack size.
 
 		Examples: >
 			:call setqflist([], 'r', {'title': 'My search'})
diff --git a/src/ex_cmds.h b/src/ex_cmds.h
index b50614780f..c559fd2d41 100644
--- a/src/ex_cmds.h
+++ b/src/ex_cmds.h
@@ -51,7 +51,9 @@
 #define BUFUNL	      0x20000L	/* accepts unlisted buffer too */
 #define ARGOPT	      0x40000L	/* allow "++opt=val" argument */
 #define SBOXOK	      0x80000L	/* allowed in the sandbox */
-#define CMDWIN	     0x100000L	/* allowed in cmdline window */
+#define CMDWIN	     0x100000L	/* allowed in cmdline window; when missing
+				 * disallows editing another buffer when
+				 * curbuf_lock is set */
 #define MODIFY       0x200000L	/* forbidden in non-'modifiable' buffer */
 #define EXFLAGS      0x400000L	/* allow flags after count in argument */
 #define FILES	(XFILE | EXTRA)	/* multiple extra files allowed */
@@ -1182,7 +1184,7 @@ EX(CMD_registers,	"registers",	ex_display,
 			EXTRA|NOTRLCOM|TRLBAR|CMDWIN,
 			ADDR_LINES),
 EX(CMD_resize,		"resize",	ex_resize,
-			RANGE|NOTADR|TRLBAR|WORD1,
+			RANGE|NOTADR|TRLBAR|WORD1|CMDWIN,
 			ADDR_LINES),
 EX(CMD_retab,		"retab",	ex_retab,
 			TRLBAR|RANGE|WHOLEFOLD|DFLALL|BANG|WORD1|CMDWIN|MODIFY,
diff --git a/src/quickfix.c b/src/quickfix.c
index 084d82ec0e..3889a95656 100644
--- a/src/quickfix.c
+++ b/src/quickfix.c
@@ -1163,8 +1163,8 @@ qf_init_ext(
     qffields_T	    fields;
 #ifdef FEAT_WINDOWS
     qfline_T	    *old_last = NULL;
-    int		    adding = FALSE;
 #endif
+    int		    adding = FALSE;
     static efm_T    *fmt_first = NULL;
     char_u	    *efm;
     static char_u   *last_efm = NULL;
@@ -1199,14 +1199,15 @@ qf_init_ext(
     if (newlist || qi->qf_curlist == qi->qf_listcount)
 	/* make place for a new list */
 	qf_new_list(qi, qf_title);
-#ifdef FEAT_WINDOWS
-    else if (qi->qf_lists[qi->qf_curlist].qf_count > 0)
+    else
     {
 	/* Adding to existing list, use last entry. */
 	adding = TRUE;
-	old_last = qi->qf_lists[qi->qf_curlist].qf_last;
-    }
+#ifdef FEAT_WINDOWS
+	if (qi->qf_lists[qi->qf_curlist].qf_count > 0)
+	    old_last = qi->qf_lists[qi->qf_curlist].qf_last;
 #endif
+    }
 
     /* Use the local value of 'errorformat' if it's set. */
     if (errorformat == p_efm && tv == NULL && *buf->b_p_efm != NUL)
@@ -4785,6 +4786,8 @@ get_errorlist_properties(win_T *wp, dict_T *what, dict_T *retdict)
 	    (void)get_errorlist(wp, qf_idx, l);
 	    dict_add_list(retdict, "items", l);
 	}
+	else
+	    status = FAIL;
     }
 
     if ((status == OK) && (flags & QF_GETLIST_CONTEXT))
@@ -4795,9 +4798,12 @@ get_errorlist_properties(win_T *wp, dict_T *what, dict_T *retdict)
 	    if (di != NULL)
 	    {
 		copy_tv(qi->qf_lists[qf_idx].qf_ctx, &di->di_tv);
-		if (dict_add(retdict, di) == FAIL)
+		status = dict_add(retdict, di);
+		if (status == FAIL)
 		    dictitem_free(di);
 	    }
+	    else
+		status = FAIL;
 	}
 	else
 	    status = dict_add_nr_str(retdict, "context", 0L, (char_u *)"");
@@ -5020,6 +5026,7 @@ qf_set_properties(qf_info_T *qi, dict_T *what, int action)
 	if (ctx != NULL)
 	    copy_tv(&di->di_tv, ctx);
 	qi->qf_lists[qf_idx].qf_ctx = ctx;
+	retval = OK;
     }
 
     return retval;
diff --git a/src/screen.c b/src/screen.c
index 7cd46be386..7cb47cd403 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -648,6 +648,8 @@ update_screen(int type_arg)
     {
 	screenclear();		/* will reset clear_cmdline */
 	type = NOT_VALID;
+	/* must_redraw may be set indirectly, avoid another redraw later */
+	must_redraw = 0;
     }
 
     if (clear_cmdline)		/* going to clear cmdline (done below) */
diff --git a/src/testdir/test_quickfix.vim b/src/testdir/test_quickfix.vim
index 755ea745c1..b3cc6891a5 100644
--- a/src/testdir/test_quickfix.vim
+++ b/src/testdir/test_quickfix.vim
@@ -1720,7 +1720,8 @@ func Xproperty_tests(cchar)
     Xopen
     wincmd p
     call g:Xsetlist([{'filename':'foo', 'lnum':27}])
-    call g:Xsetlist([], 'a', {'title' : 'Sample'})
+    let s = g:Xsetlist([], 'a', {'title' : 'Sample'})
+    call assert_equal(0, s)
     let d = g:Xgetlist({"title":1})
     call assert_equal('Sample', d.title)
 
@@ -1774,7 +1775,8 @@ func Xproperty_tests(cchar)
     endif
 
     " Context related tests
-    call g:Xsetlist([], 'a', {'context':[1,2,3]})
+    let s = g:Xsetlist([], 'a', {'context':[1,2,3]})
+    call assert_equal(0, s)
     call test_garbagecollect_now()
     let d = g:Xgetlist({'context':1})
     call assert_equal([1,2,3], d.context)
@@ -1839,8 +1841,9 @@ func Xproperty_tests(cchar)
     " Test for setting/getting items
     Xexpr ""
     let qfprev = g:Xgetlist({'nr':0})
-    call g:Xsetlist([], ' ', {'title':'Green',
+    let s = g:Xsetlist([], ' ', {'title':'Green',
 		\ 'items' : [{'filename':'F1', 'lnum':10}]})
+    call assert_equal(0, s)
     let qfcur = g:Xgetlist({'nr':0})
     call assert_true(qfcur.nr == qfprev.nr + 1)
     let l = g:Xgetlist({'items':1})
@@ -2187,18 +2190,6 @@ func Test_bufoverflow()
   set efm&vim
 endfunc
 
-func Test_cclose_from_copen()
-    augroup QF_Test
-	au!
-        au FileType qf :call assert_fails(':cclose', 'E788')
-    augroup END
-    copen
-    augroup QF_Test
-	au!
-    augroup END
-    augroup! QF_Test
-endfunc
-
 " Tests for getting the quickfix stack size
 func XsizeTests(cchar)
   call s:setup_commands(a:cchar)
@@ -2228,6 +2219,18 @@ func Test_Qf_Size()
   call XsizeTests('l')
 endfunc
 
+func Test_cclose_from_copen()
+    augroup QF_Test
+	au!
+        au FileType qf :call assert_fails(':cclose', 'E788')
+    augroup END
+    copen
+    augroup QF_Test
+	au!
+    augroup END
+    augroup! QF_Test
+endfunc
+
 func Test_cclose_in_autocmd()
   " Problem is only triggered if "starting" is zero, so that the OptionsSet
   " event will be triggered.
@@ -2243,3 +2246,20 @@ func Test_cclose_in_autocmd()
   augroup! QF_Test
   call test_override('starting', 0)
 endfunc
+
+func Test_resize_from_copen()
+    augroup QF_Test
+	au!
+        au FileType qf resize 5
+    augroup END
+    try
+	" This should succeed without any exception.  No other buffers are
+	" involved in the autocmd.
+	copen
+    finally
+	augroup QF_Test
+	    au!
+	augroup END
+	augroup! QF_Test
+    endtry
+endfunc
diff --git a/src/version.c b/src/version.c
index 566527e49e..e335464b52 100644
--- a/src/version.c
+++ b/src/version.c
@@ -779,6 +779,12 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    688,
+/**/
+    687,
+/**/
+    686,
 /**/
     685,
 /**/