patch 7.4.2161
Problem:    Expression test fails without conceal feature.
Solution:   Only check "conceal" with the conceal feature.
diff --git a/src/testdir/test_expr.vim b/src/testdir/test_expr.vim
index 557d749..cd71c41 100644
--- a/src/testdir/test_expr.vim
+++ b/src/testdir/test_expr.vim
@@ -198,8 +198,12 @@
 func Test_setmatches()
   hi def link 1 Comment
   hi def link 2 PreProc
-  let set = [{"group": 1, "pattern": 2, "id": 3, "priority": 4, "conceal": 5}]
-  let exp = [{"group": '1', "pattern": '2', "id": 3, "priority": 4, "conceal": '5'}]
+  let set = [{"group": 1, "pattern": 2, "id": 3, "priority": 4}]
+  let exp = [{"group": '1', "pattern": '2', "id": 3, "priority": 4}]
+  if has('conceal')
+    let set[0]['conceal'] = 5
+    let exp[0]['conceal'] = '5'
+  endif
   call setmatches(set)
   call assert_equal(exp, getmatches())
 endfunc