diff --git a/src/eval.c b/src/eval.c
index aab9b0b..76b4159 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -16292,7 +16292,8 @@
 		action = *act;
 	}
 
-	if (l != NULL && set_errorlist(wp, l, action, NULL) == OK)
+	if (l != NULL && set_errorlist(wp, l, action,
+	       (char_u *)(wp == NULL ? "setqflist()" : "setloclist()")) == OK)
 	    rettv->vval.v_number = 0;
     }
 #endif
diff --git a/src/quickfix.c b/src/quickfix.c
index 2a485f0..ac93669 100644
--- a/src/quickfix.c
+++ b/src/quickfix.c
@@ -2124,15 +2124,22 @@
     int		idx;
 {
     qfline_T	*qfp;
+    int		stop = FALSE;
 
     while (qi->qf_lists[idx].qf_count)
     {
 	qfp = qi->qf_lists[idx].qf_start->qf_next;
-	if (qi->qf_lists[idx].qf_title != NULL)
+	if (qi->qf_lists[idx].qf_title != NULL && !stop)
 	{
 	    vim_free(qi->qf_lists[idx].qf_start->qf_text);
+	    stop = (qi->qf_lists[idx].qf_start == qfp);
 	    vim_free(qi->qf_lists[idx].qf_start->qf_pattern);
 	    vim_free(qi->qf_lists[idx].qf_start);
+	    if (stop)
+		/* Somehow qf_count may have an incorrect value, set it to 1
+		 * to avoid crashing when it's wrong.
+		 * TODO: Avoid qf_count being incorrect. */
+		qi->qf_lists[idx].qf_count = 1;
 	}
 	qi->qf_lists[idx].qf_start = qfp;
 	--qi->qf_lists[idx].qf_count;
diff --git a/src/version.c b/src/version.c
index 8296bd4..411d558 100644
--- a/src/version.c
+++ b/src/version.c
@@ -726,6 +726,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    746,
+/**/
     745,
 /**/
     744,