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From: Igor Munkin via Tarantool-patches <tarantool-patches@dev.tarantool.org>
To: Sergey Kaplun <skaplun@tarantool.org>
Cc: tarantool-patches@dev.tarantool.org
Subject: Re: [Tarantool-patches] [PATCH v2 luajit 16/30] test: adapt PUC Lua test for %q in fmt for LuaJIT
Date: Wed, 7 Apr 2021 00:37:04 +0300	[thread overview]
Message-ID: <20210406213704.GL29703@tarantool.org> (raw)
In-Reply-To: <YGW9nXJMdP9oHnXv@root>

Sergey,

On 01.04.21, Sergey Kaplun wrote:
> Igor,
> 
> Thanks for the review!
> 
> On 31.03.21, Igor Munkin wrote:
> > Sergey,
> > 

<snipped>

> > 
> > > string.format(): %q reversible.
> > > See also https://luajit.org/extensions.html#lua52.
> > > 
> > > In Lua 5.1 string.format() does not accept string values containing
> > > embedded zeros, except as arguments to the '%q' option.
> > > In Lua 5.2 '\0' is not handled differently from other
> > > control chars in string.format('%q', ...).
> > > See commit 7cc981c14067d4b0e774a6bfb0acfc2f5c911f0d
> > > (string.format("%q", str) is now fully reversible
> > > (from Lua 5.2).).
> > 
> > Well, I honestly don't understand what is changed in *semantics*. I've
> > tried the following command with Lua 5.2, Lua 5.1 and LuaJIT 2.0.5 as an
> > interpreter being tested
> > | <interp> -e 'print(string.format("%q", "\0"))'
> > 
> > I understand the semantics of "%q", but was it just a bug in Lua 5.1?
> 
> A bug with the test for it???

Well, I can remind you the bug with <tonumber> we fixed the last year.
There might be no test for it though, but all in all it has not been
fixed in Lua 5.1.

> 
> > What does "fully reversible" mean in this context?

This question is left unaddressed.

> > 
> > I understand only the fact the behaviour differs and you reimplemented
> > the test assertion according to Lua 5.2 testing suite. That's all.
> > 
> > I found not a single word regarding this issue in Lua bugs[1] page,
> > except invalid handling of \r[2]. Is there any issue/page with a more
> 
> It looks unrelated to these changes.
> 
> > verbose explanation what has been changed in 7cc981c?
> 
> I just read these lines in Lua 5.1 reference manual :):
> | This function does not accept string values containing embedded
> | zeros, except as arguments to the q option.

So what? This means literally nothing to me... BTW, I can pass such
string to the function and it can yield any bullshit the developer
wanted to. That's why we decided to comment such places in a clear and
verbose way, didn't we?

> 
> As for me, it is just new behaviour of Lua 5.2 -- patterns now accept
> '\0' as a reqular character (see
> 4541243355a299a9b75042d207feb87295872c3a (patterns now accept '\0' as a
> regular character) from Lua repository). So, according to commit
> 658ea8752b979102627e2fede7b7ddfbb67ba6c9 (no need to handle '\0'
> differently from other control chars in format '%q')) from Lua
> repository, this behaviour is excess.
> 
> Also, it is mentioned here [2].

I see nothing regarding this change there.

> 

<snipped>

> > 
> > [1]: https://www.lua.org/bugs.html#5.1
> > [2]: https://www.lua.org/bugs.html#5.1-4
> > 
> > -- 
> > Best regards,
> > IM
> 
> [1]: https://www.lua.org/manual/5.1/manual.html#pdf-string.format
> [2]: https://www.lua.org/manual/5.2/manual.html#8.2
> 
> -- 
> Best regards,
> Sergey Kaplun

-- 
Best regards,
IM

  reply	other threads:[~2021-04-06 21:37 UTC|newest]

Thread overview: 153+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-26  7:42 [Tarantool-patches] [PATCH v2 luajit 00/30] Adapt PUC-Rio Lua 5.1 test suite Sergey Kaplun via Tarantool-patches
2021-03-26  7:42 ` [Tarantool-patches] [PATCH v2 luajit 01/30] test: add " Sergey Kaplun via Tarantool-patches
2021-03-26 10:14   ` Sergey Ostanevich via Tarantool-patches
2021-03-30 22:13   ` Igor Munkin via Tarantool-patches
2021-04-01  8:11     ` Sergey Kaplun via Tarantool-patches
2021-03-26  7:42 ` [Tarantool-patches] [PATCH v2 luajit 02/30] test: add compiling for C libs from PUC-Rio-Lua5.1 Sergey Kaplun via Tarantool-patches
2021-03-26 11:01   ` Sergey Ostanevich via Tarantool-patches
2021-03-30 22:14   ` Igor Munkin via Tarantool-patches
2021-04-01  8:21     ` Sergey Kaplun via Tarantool-patches
2021-03-26  7:42 ` [Tarantool-patches] [PATCH v2 luajit 03/30] test: adapt Lua 5.1 suite for out-of-source build Sergey Kaplun via Tarantool-patches
2021-03-26 11:07   ` Sergey Ostanevich via Tarantool-patches
2021-03-26 14:25     ` Sergey Kaplun via Tarantool-patches
2021-03-31 22:58       ` Igor Munkin via Tarantool-patches
2021-04-01  8:43         ` Sergey Kaplun via Tarantool-patches
2021-03-31 22:58   ` Igor Munkin via Tarantool-patches
2021-04-01  8:40     ` Sergey Kaplun via Tarantool-patches
2021-04-06 16:56       ` Igor Munkin via Tarantool-patches
2021-03-26  7:42 ` [Tarantool-patches] [PATCH v2 luajit 04/30] test: remove quotes in progname from <main.lua> Sergey Kaplun via Tarantool-patches
2021-03-26 11:12   ` Sergey Ostanevich via Tarantool-patches
2021-03-31 22:58   ` Igor Munkin via Tarantool-patches
2021-04-01  8:50     ` Sergey Kaplun via Tarantool-patches
2021-03-26  7:42 ` [Tarantool-patches] [PATCH v2 luajit 05/30] test: adapt arg availability test from Lua suite Sergey Kaplun via Tarantool-patches
2021-03-26 11:22   ` Sergey Ostanevich via Tarantool-patches
2021-03-31 22:58   ` Igor Munkin via Tarantool-patches
2021-04-01  9:37     ` Sergey Kaplun via Tarantool-patches
2021-04-06 15:24       ` Igor Munkin via Tarantool-patches
2021-03-26  7:42 ` [Tarantool-patches] [PATCH v2 luajit 06/30] test: disable PUC Lua tests confused by -v output Sergey Kaplun via Tarantool-patches
2021-03-26 11:26   ` Sergey Ostanevich via Tarantool-patches
2021-03-26 14:31     ` Sergey Kaplun via Tarantool-patches
2021-03-31 22:58   ` Igor Munkin via Tarantool-patches
2021-04-01  9:56     ` Sergey Kaplun via Tarantool-patches
2021-03-26  7:42 ` [Tarantool-patches] [PATCH v2 luajit 07/30] test: disable Lua tests for bytecode with header Sergey Kaplun via Tarantool-patches
2021-03-26 11:30   ` Sergey Ostanevich via Tarantool-patches
2021-03-31 22:59   ` Igor Munkin via Tarantool-patches
2021-03-26  7:42 ` [Tarantool-patches] [PATCH v2 luajit 08/30] test: disable JIT for GC step counting tests Sergey Kaplun via Tarantool-patches
2021-03-26 11:32   ` Sergey Ostanevich via Tarantool-patches
2021-03-30 22:14   ` Igor Munkin via Tarantool-patches
2021-04-01 10:10     ` Sergey Kaplun via Tarantool-patches
2021-03-26  7:42 ` [Tarantool-patches] [PATCH v2 luajit 09/30] test: disable Lua suite tests for line hook Sergey Kaplun via Tarantool-patches
2021-03-26 11:35   ` Sergey Ostanevich via Tarantool-patches
2021-03-26 14:33     ` Sergey Kaplun via Tarantool-patches
2021-03-31 22:59   ` Igor Munkin via Tarantool-patches
2021-04-01 10:06     ` Sergey Kaplun via Tarantool-patches
2021-04-06 19:45       ` Igor Munkin via Tarantool-patches
2021-03-26  7:42 ` [Tarantool-patches] [PATCH v2 luajit 10/30] test: adapt test for debug.setlocal in Lua suite Sergey Kaplun via Tarantool-patches
2021-03-26 11:44   ` Sergey Ostanevich via Tarantool-patches
2021-03-26 14:45     ` Sergey Kaplun via Tarantool-patches
2021-03-30 22:14   ` Igor Munkin via Tarantool-patches
2021-04-01 10:16     ` Sergey Kaplun via Tarantool-patches
2021-03-26  7:42 ` [Tarantool-patches] [PATCH v2 luajit 11/30] test: adapt getlocal PUC test for vararg func Sergey Kaplun via Tarantool-patches
2021-03-26 11:47   ` Sergey Ostanevich via Tarantool-patches
2021-03-26 14:52     ` Sergey Kaplun via Tarantool-patches
2021-03-30 22:15   ` Igor Munkin via Tarantool-patches
2021-04-01 11:37     ` Sergey Kaplun via Tarantool-patches
2021-04-06 20:09       ` Igor Munkin via Tarantool-patches
2021-04-06 20:40         ` Igor Munkin via Tarantool-patches
2021-03-26  7:42 ` [Tarantool-patches] [PATCH v2 luajit 12/30] test: adapt PUC Lua test with count hooks Sergey Kaplun via Tarantool-patches
2021-03-26 11:49   ` Sergey Ostanevich via Tarantool-patches
2021-03-30 22:15   ` Igor Munkin via Tarantool-patches
2021-04-01 11:42     ` Sergey Kaplun via Tarantool-patches
2021-03-26  7:42 ` [Tarantool-patches] [PATCH v2 luajit 13/30] test: disable PUC Lua test for tail call info Sergey Kaplun via Tarantool-patches
2021-03-26 14:43   ` Sergey Ostanevich via Tarantool-patches
2021-03-30 22:15   ` Igor Munkin via Tarantool-patches
2021-04-01 11:52     ` Sergey Kaplun via Tarantool-patches
2021-03-26  7:42 ` [Tarantool-patches] [PATCH v2 luajit 14/30] test: adapt activeline check in the PUC Lua test Sergey Kaplun via Tarantool-patches
2021-03-26 14:50   ` Sergey Ostanevich via Tarantool-patches
2021-03-30 22:15   ` Igor Munkin via Tarantool-patches
2021-04-01 11:58     ` Sergey Kaplun via Tarantool-patches
2021-03-26  7:42 ` [Tarantool-patches] [PATCH v2 luajit 15/30] test: disable PUC-Lua test for per-coroutine hooks Sergey Kaplun via Tarantool-patches
2021-03-26 14:54   ` Sergey Ostanevich via Tarantool-patches
2021-03-30 22:16   ` Igor Munkin via Tarantool-patches
2021-04-01 12:03     ` Sergey Kaplun via Tarantool-patches
2021-03-26  7:42 ` [Tarantool-patches] [PATCH v2 luajit 16/30] test: adapt PUC Lua test for %q in fmt for LuaJIT Sergey Kaplun via Tarantool-patches
2021-03-26 14:56   ` Sergey Ostanevich via Tarantool-patches
2021-03-30 22:16   ` Igor Munkin via Tarantool-patches
2021-04-01 12:33     ` Sergey Kaplun via Tarantool-patches
2021-04-06 21:37       ` Igor Munkin via Tarantool-patches [this message]
2021-04-07 15:50         ` Sergey Kaplun via Tarantool-patches
2021-04-07 16:31           ` Igor Munkin via Tarantool-patches
2021-04-08  8:51             ` Sergey Kaplun via Tarantool-patches
2021-04-12 10:26               ` Igor Munkin via Tarantool-patches
2021-03-26  7:43 ` [Tarantool-patches] [PATCH v2 luajit 17/30] test: disable locale-depended tests for Lua suite Sergey Kaplun via Tarantool-patches
2021-03-26 14:58   ` Sergey Ostanevich via Tarantool-patches
2021-03-30 22:16   ` Igor Munkin via Tarantool-patches
2021-04-01 19:12     ` Sergey Kaplun via Tarantool-patches
2021-03-26  7:43 ` [Tarantool-patches] [PATCH v2 luajit 18/30] test: replace math.mod to math.fmod for Lua tests Sergey Kaplun via Tarantool-patches
2021-03-26 15:12   ` Sergey Ostanevich via Tarantool-patches
2021-03-30 22:17     ` Igor Munkin via Tarantool-patches
2021-03-26 15:16   ` Sergey Ostanevich via Tarantool-patches
2021-03-30 22:16   ` Igor Munkin via Tarantool-patches
2021-04-01 19:36     ` Sergey Kaplun via Tarantool-patches
2021-03-26  7:43 ` [Tarantool-patches] [PATCH v2 luajit 19/30] test: remove assert for string.gfind check Sergey Kaplun via Tarantool-patches
2021-03-26 15:14   ` Sergey Ostanevich via Tarantool-patches
2021-03-30 22:17   ` Igor Munkin via Tarantool-patches
2021-04-02  7:05     ` Sergey Kaplun via Tarantool-patches
2021-03-26  7:43 ` [Tarantool-patches] [PATCH v2 luajit 20/30] test: adapt PUC Lua test for args in vararg func Sergey Kaplun via Tarantool-patches
2021-03-26 14:54   ` Sergey Kaplun via Tarantool-patches
2021-03-26 15:22     ` Sergey Ostanevich via Tarantool-patches
2021-03-31  9:51   ` Igor Munkin via Tarantool-patches
2021-04-02  7:21     ` Sergey Kaplun via Tarantool-patches
2021-04-06 20:45       ` Igor Munkin via Tarantool-patches
2021-03-26  7:43 ` [Tarantool-patches] [PATCH v2 luajit 21/30] test: disable test for getfenv in closure tailcall Sergey Kaplun via Tarantool-patches
2021-03-26 15:41   ` Sergey Ostanevich via Tarantool-patches
2021-03-31  9:51   ` Igor Munkin via Tarantool-patches
2021-04-02  7:40     ` Sergey Kaplun via Tarantool-patches
2021-03-26  7:43 ` [Tarantool-patches] [PATCH v2 luajit 22/30] test: disable PUC Lua test for var names in error Sergey Kaplun via Tarantool-patches
2021-03-26 15:44   ` Sergey Ostanevich via Tarantool-patches
2021-03-26 16:01     ` Sergey Kaplun via Tarantool-patches
2021-03-31 19:23   ` Igor Munkin via Tarantool-patches
2021-04-02  7:48     ` Sergey Kaplun via Tarantool-patches
2021-03-26  7:43 ` [Tarantool-patches] [PATCH v2 luajit 23/30] test: disable PUC Lua test for fast function name Sergey Kaplun via Tarantool-patches
2021-03-26 15:45   ` Sergey Ostanevich via Tarantool-patches
2021-03-31 19:23   ` Igor Munkin via Tarantool-patches
2021-04-02  8:14     ` Sergey Kaplun via Tarantool-patches
2021-04-06 21:37       ` Igor Munkin via Tarantool-patches
2021-04-07 16:06         ` Sergey Kaplun via Tarantool-patches
2021-04-07 16:11           ` Igor Munkin via Tarantool-patches
2021-04-07 19:57             ` Sergey Kaplun via Tarantool-patches
2021-04-12  9:36               ` Igor Munkin via Tarantool-patches
2021-03-26  7:43 ` [Tarantool-patches] [PATCH v2 luajit 24/30] test: disable PUC Lua test for non-asci identifier Sergey Kaplun via Tarantool-patches
2021-03-26 15:46   ` Sergey Ostanevich via Tarantool-patches
2021-03-31 19:23   ` Igor Munkin via Tarantool-patches
2021-04-02  8:20     ` Sergey Kaplun via Tarantool-patches
2021-03-26  7:43 ` [Tarantool-patches] [PATCH v2 luajit 25/30] test: disable PUC Lua error test for syntax level Sergey Kaplun via Tarantool-patches
2021-03-26 15:52   ` Sergey Ostanevich via Tarantool-patches
2021-03-31 19:24   ` Igor Munkin via Tarantool-patches
2021-04-02  8:30     ` Sergey Kaplun via Tarantool-patches
2021-03-26  7:43 ` [Tarantool-patches] [PATCH v2 luajit 26/30] test: disable tests with multiple -l options Sergey Kaplun via Tarantool-patches
2021-03-26 15:56   ` Sergey Ostanevich via Tarantool-patches
2021-03-31 19:24   ` Igor Munkin via Tarantool-patches
2021-03-26  7:43 ` [Tarantool-patches] [PATCH v2 luajit 27/30] test: disable PUC Lua test for checking arg layout Sergey Kaplun via Tarantool-patches
2021-03-26 15:58   ` Sergey Ostanevich via Tarantool-patches
2021-03-31 19:24   ` Igor Munkin via Tarantool-patches
2021-04-02  8:35     ` Sergey Kaplun via Tarantool-patches
2021-03-26  7:43 ` [Tarantool-patches] [PATCH v2 luajit 28/30] test: disable PUC Lua test checking -h option Sergey Kaplun via Tarantool-patches
2021-03-26 15:58   ` Sergey Ostanevich via Tarantool-patches
2021-03-31 19:24   ` Igor Munkin via Tarantool-patches
2021-04-02  8:39     ` Sergey Kaplun via Tarantool-patches
2021-03-26  7:43 ` [Tarantool-patches] [PATCH v2 luajit 29/30] test: disable PUC Lua hanging GC test Sergey Kaplun via Tarantool-patches
2021-03-26 16:03   ` Sergey Ostanevich via Tarantool-patches
2021-03-31 19:24     ` Igor Munkin via Tarantool-patches
2021-03-31 19:24   ` Igor Munkin via Tarantool-patches
2021-04-02  8:45     ` Sergey Kaplun via Tarantool-patches
2021-03-26  7:43 ` [Tarantool-patches] [PATCH v2 luajit 30/30] test: disable too depth recursive PUC Lua test Sergey Kaplun via Tarantool-patches
2021-03-26 16:28   ` Sergey Ostanevich via Tarantool-patches
2021-03-26 16:45     ` Sergey Kaplun via Tarantool-patches
2021-03-31 19:24   ` Igor Munkin via Tarantool-patches
2021-04-02  8:47     ` Sergey Kaplun via Tarantool-patches
2021-03-26 11:09 ` [Tarantool-patches] [PATCH v2 luajit 00/30] Adapt PUC-Rio Lua 5.1 test suite Sergey Ostanevich via Tarantool-patches
2021-03-26 14:12   ` Sergey Kaplun via Tarantool-patches
2021-03-30 22:17 ` Igor Munkin via Tarantool-patches
2021-03-31  9:41   ` Sergey Kaplun via Tarantool-patches
2021-03-31 10:49     ` Igor Munkin via Tarantool-patches

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