patch 7.4.2081
Problem:    Line numbers in the error list are not always adjusted.
Solution:   Set b_has_qf_entry properly. (Yegappan Lakshmanan)
diff --git a/src/quickfix.c b/src/quickfix.c
index fecc2c9..51f96dc 100644
--- a/src/quickfix.c
+++ b/src/quickfix.c
@@ -1408,7 +1408,8 @@
 
 	qfp->qf_fnum = bufnum;
 	if (buf != NULL)
-	    buf->b_has_qf_entry = TRUE;
+	    buf->b_has_qf_entry |=
+		(qi == &ql_info) ? BUF_HAS_QF_ENTRY : BUF_HAS_LL_ENTRY;
     }
     else
 	qfp->qf_fnum = qf_get_fnum(qi, dir, fname);
@@ -1680,7 +1681,8 @@
     if (buf == NULL)
 	return 0;
 
-    buf->b_has_qf_entry = TRUE;
+    buf->b_has_qf_entry =
+			(qi == &ql_info) ? BUF_HAS_QF_ENTRY : BUF_HAS_LL_ENTRY;
     return buf->b_fnum;
 }
 
@@ -2728,8 +2730,9 @@
     int		idx;
     qf_info_T	*qi = &ql_info;
     int		found_one = FALSE;
+    int		buf_has_flag = wp == NULL ? BUF_HAS_QF_ENTRY : BUF_HAS_LL_ENTRY;
 
-    if (!curbuf->b_has_qf_entry)
+    if (!(curbuf->b_has_qf_entry & buf_has_flag))
 	return;
     if (wp != NULL)
     {
@@ -2758,7 +2761,7 @@
 		}
 
     if (!found_one)
-	curbuf->b_has_qf_entry = FALSE;
+	curbuf->b_has_qf_entry &= ~buf_has_flag;
 }
 
 /*
diff --git a/src/structs.h b/src/structs.h
index 00a8e03..191fa1f 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -1906,6 +1906,8 @@
 #ifdef FEAT_QUICKFIX
     char_u	*b_p_bh;	/* 'bufhidden' */
     char_u	*b_p_bt;	/* 'buftype' */
+#define BUF_HAS_QF_ENTRY 1
+#define BUF_HAS_LL_ENTRY 2
     int		b_has_qf_entry;
 #endif
     int		b_p_bl;		/* 'buflisted' */
diff --git a/src/testdir/test_quickfix.vim b/src/testdir/test_quickfix.vim
index 83f4d0c..e79315b 100644
--- a/src/testdir/test_quickfix.vim
+++ b/src/testdir/test_quickfix.vim
@@ -1341,13 +1341,14 @@
 
   enew | only
 
-  call s:create_test_file('Xqftestfile')
-  edit Xqftestfile
+  let fname = 'Xqftestfile' . a:cchar
+  call s:create_test_file(fname)
+  exe 'edit ' . fname
 
-  Xgetexpr ['Xqftestfile:5:Line5',
-		\ 'Xqftestfile:10:Line10',
-		\ 'Xqftestfile:15:Line15',
-		\ 'Xqftestfile:20:Line20']
+  Xgetexpr [fname . ':5:Line5',
+	      \ fname . ':10:Line10',
+	      \ fname . ':15:Line15',
+	      \ fname . ':20:Line20']
 
   6,14delete
   call append(6, ['Buffer', 'Window'])
@@ -1359,11 +1360,13 @@
   call assert_equal(13, l[3].lnum)
 
   enew!
-  call delete('Xqftestfile')
+  call delete(fname)
 endfunction
 
 function! Test_adjust_lnum()
+  call setloclist(0, [])
   call Xadjust_qflnum('c')
+  call setqflist([])
   call Xadjust_qflnum('l')
 endfunction
 
diff --git a/src/version.c b/src/version.c
index 742f78b..4a82355 100644
--- a/src/version.c
+++ b/src/version.c
@@ -759,6 +759,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2081,
+/**/
     2080,
 /**/
     2079,