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From: Junio C Hamano <>
To: "Randall S. Becker" <>
Cc: <>,
	Johannes Schindelin <>,
	Duy Nguyen <>
Subject: Re: [ANNOUNCE] Git v2.21.0-rc2
Date: Wed, 20 Feb 2019 11:41:55 -0800
Message-ID: <> (raw)
In-Reply-To: <012601d4c8b5$54f1b730$fed52590$> (Randall S. Becker's message of "Tue, 19 Feb 2019 19:43:37 -0500")

"Randall S. Becker" <> writes:

> On February 19, 2019 18:29, Junio C Hamano wrote:
>> A release candidate Git v2.21.0-rc2 is now available for testing at the usual
>> places.  It is comprised of 474 non-merge commits since v2.20.0, contributed
>> by 61 people, 16 of which are new faces.
> Thanks. t5562 works properly on NonStop (3 tests under various
> loads). I am starting a full regression test now - see you in two
> days or so with a full report.

Thanks.  In the end I ended up doing the following:

 - kept most of your "feed NULs generated from a helper program via
   pipe, instead of reading from /dev/zero" patch,

 - replaced the helper program used in the above with the test-tool
   one by Dscho,

 - used Max's "do not reuse the output file---the background writer
   about to die may still have it open when the next test starts",

 - used Max's "when testing the program with overly large input
   declared with content-length, do not have to feed from /dev/zero;
   /dev/null suffices as a mistaken program attempting to read would
   die when seeing EOF anyway" patch to reduce one mention of
   /dev/zero (or one pipe from the helper output) further.

Hopefully Dscho's Azure thing would also be happy with one less use
of Perl script.

As I said earlier, a few places in t/ still mention /dev/zero and I
think it is a real bug on platforms without /dev/zero in t4153:

    $ git grep -h dev/zero t/
            test_must_fail test_terminal git am --3way </dev/zero &&
            test_must_fail test_terminal git am --reject </dev/zero &&

Curiously, applying the attached patch and running the test on Linux
would notice that we do not have such a device file, and the use of
test_must_fail does *not* make it a-OK [*].  I am not sure why you
are not getting hit by the same issue.

	Side note: test_must_fail is to ensure that the command
	exits in a controlled way without segfault, so at the first
	glance, replacing /dev/zero with something nonsensical and
	nonexistent ought to make the command pass, but that is not
	the case.  The shell notices redirection failure and aborts
	the &&-chain.  This behaviour matches what we want, so I
	won't complain ;-)

Another mention of /dev/zero appears in t/helper/ (not
to be confused with t/helper/test-sha1.c).  This seems to be run
only with an explicit "make -C t/helper check-sha1" request, so
perhaps nobody on your platform ran it to get hit by it.  I wonder
if anybody runs this on any platform, to be honest, though.  Duy
Cc'ed as the last person to touch that particular target---yes, I
know I was guilty of introducing it in b65bc21e ("Makefile: add
framework to verify and bench sha1 implementations.", 2006-06-24).

 t/ | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/t/ b/t/
index 8ea22d1bcb..29ef22c94f 100755
--- a/t/
+++ b/t/
@@ -40,7 +40,7 @@ test_expect_success TTY '--3way overrides --no-3way' '
 	# Applying side1 with am --3way will succeed due to the threeway-merge.
 	# Applying side2 will fail as --3way does not apply to it.
-	test_must_fail test_terminal git am --3way </dev/zero &&
+	test_must_fail test_terminal git am --3way </dev/zarro &&
 	test_path_is_dir .git/rebase-apply &&
 	test side1 = "$(cat file2)"
@@ -94,7 +94,7 @@ test_expect_success TTY '--reject overrides --no-reject' '
 	test_path_is_dir .git/rebase-apply &&
 	test_path_is_missing file.rej &&
-	test_must_fail test_terminal git am --reject </dev/zero &&
+	test_must_fail test_terminal git am --reject </dev/zarro &&
 	test_path_is_dir .git/rebase-apply &&
 	test_path_is_file file.rej

  reply	other threads:[~2019-02-20 19:42 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-19 23:29 Junio C Hamano
2019-02-20  0:43 ` Randall S. Becker
2019-02-20 19:41   ` Junio C Hamano [this message]
2019-02-20 20:46     ` Johannes Schindelin
2019-02-21 13:10     ` Duy Nguyen
2019-02-21 23:55       ` brian m. carlson
2019-02-22  9:13         ` Duy Nguyen
2019-02-21 15:54     ` Randall S. Becker
2019-02-21 20:04       ` Junio C Hamano
2019-02-21 21:06       ` SZEDER Gábor
2019-02-21 21:30         ` Randall S. Becker
2019-02-21 19:59     ` Randall S. Becker
2019-02-21 10:46 ` Git for Windows v2.21.0-rc2, was " Johannes Schindelin
2019-02-21 19:28 ` [PATCH 0/2] BSD portability fixes for 2.21.0-rc2 Ævar Arnfjörð Bjarmason
2019-02-22  0:37   ` Josh Steadmon
2019-02-21 19:28 ` [PATCH 1/2] tests: fix unportable "\?" and "\+" regex syntax Ævar Arnfjörð Bjarmason
2019-02-22  5:00   ` Junio C Hamano
2019-02-21 19:28 ` [PATCH 2/2] commit-graph tests: fix cryptic unportable "dd" invocation Ævar Arnfjörð Bjarmason
2019-02-21 20:43   ` SZEDER Gábor
2019-02-21 22:26     ` Ævar Arnfjörð Bjarmason
2019-02-22 10:50       ` SZEDER Gábor
2019-02-22 14:34         ` Ævar Arnfjörð Bjarmason
2019-02-22 18:30           ` Junio C Hamano
2019-02-22 18:35             ` Todd Zullinger
2019-02-22 19:23               ` [PATCH v3] commit-graph tests: fix " Junio C Hamano

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