t6101: avoid suppressing git's exit code

Update t6101-rev-parse-parents.sh to redirect git-rev-parse
output to a temporary file instead of piping it directly to
not hide the exit code of git commands behind pipes, as a
crash in git might go unnoticed.

Signed-off-by: Trieu Huynh <vikingtc4@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/t/t6101-rev-parse-parents.sh b/t/t6101-rev-parse-parents.sh
index 5f55ab98d352fcb24df355e0976586ed848347c1..728188971744c4b585fecf4c35f00f4c119c03d2 100755 (executable)
--- a/t/t6101-rev-parse-parents.sh
+++ b/t/t6101-rev-parse-parents.sh
@@ -39,7 +39,8 @@ test_expect_success 'setup' '
 '
 
 test_expect_success 'start is valid' '
-       git rev-parse start | grep "^$OID_REGEX$"
+       git rev-parse start >actual &&
+       test_grep "^$OID_REGEX$" actual
 '
 
 test_expect_success 'start^0' '