grep: use get_pathspec() correctly

diff --git a/t/t0081-line-buffer.sh b/t/t0081-line-buffer.sh
index a8eeb206457be723ac35c35e557f45967650dc89..550fad0823a8d27cf1d49b1c55154ea7ce69de02 100755 (executable)
--- a/t/t0081-line-buffer.sh
+++ b/t/t0081-line-buffer.sh
@@ -131,6 +131,15 @@ test_expect_success PIPE,EXPENSIVE 'longer read (around 65536 bytes)' '
        long_read_test 65536
 '
 
+test_expect_success 'read from file descriptor' '
+       rm -f input &&
+       echo hello >expect &&
+       echo hello >input &&
+       echo copy 6 |
+       test-line-buffer "&4" 4<input >actual &&
+       test_cmp expect actual
+'
+
 test_expect_success 'buffer_read_string copes with null byte' '
        >expect &&
        q_to_nul <<-\EOF | test-line-buffer >actual &&