patch 8.2.1982: quickfix window now updated when adding invalid entries Commit: https://github.com/vim/vim/commit/2ce7790348dab9cbfcc5d02c8258d0dd7ecacf95 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Nov 14 13:15:24 2020 +0100 patch 8.2.1982: quickfix window now updated when adding invalid entries Problem: Quickfix window now updated when adding invalid entries. Solution: Update the quickfix buffer properly. (Yegappan Lakshmanan, closes #7291, closes #7271)

--- a/src/quickfix.c
+++ b/src/quickfix.c
@@ -4674,14 +4674,17 @@ qf_fill_buffer(qf_list_T *qfl, buf_T *bu
 	*dirname = NUL;
 
 	// Add one line for each error
-	if (old_last == NULL || old_last->qf_next == NULL)
+	if (old_last == NULL)
 	{
 	    qfp = qfl->qf_start;
 	    lnum = 0;
 	}
 	else
 	{
-	    qfp = old_last->qf_next;
+	    if (old_last->qf_next != NULL)
+		qfp = old_last->qf_next;
+	    else
+		qfp = old_last;
 	    lnum = buf->b_ml.ml_line_count;
 	}