From: "Johan Bockgård" <bojohan@gnu.org>
To: Chong Yidong <cyd@stupidchicken.com>
Cc: 7146@debbugs.gnu.org, Frank <some.frank@gmail.com>
Subject: bug#7146: (make-symbol "") issues
Date: Sun, 03 Oct 2010 12:28:55 +0200 [thread overview]
Message-ID: <87bp7bfu3c.fsf@gnu.org> (raw)
In-Reply-To: <87fwwn3opr.fsf@stupidchicken.com> (Chong Yidong's message of "Sun, 03 Oct 2010 00:05:52 -0400")
Chong Yidong <cyd@stupidchicken.com> writes:
> Frank <some.frank@gmail.com> writes:
>
>> 1) Start `emacs -Q'
>> 2) Load the file bug.el into a buffer via the menu
>> 3) <M-x> byte-compile-file
>> 4) <M-x> load-file bug.elc
>> 5) <C-x b> *scratch*
>> 6) (foo) *** emacs crashes or foo returns some odd number ***
>
> I assume by (foo) you mean typing "(foo)" and doing C-j or C-x C-e.
>
> I'm afraid I don't see any crash. The number 6 appears in the echo
> area, that's all.
The problem is that there is no read syntax for a symbol with an empty
name, so it can't reliably be printed to a string (file) and read back.
(symbol-name (aref [#: x] 0)) => "x" ; This is what happens in the report.
but (symbol-name (aref [#:] 0)) => ""
You could change the reader to somehow recognize the first case. The
problem would come back if you changed `make-symbol' to `intern',
though, since it really prints as nothing at all.
next prev parent reply other threads:[~2010-10-03 10:28 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-02 4:19 bug#7146: (make-symbol "") issues Frank
2010-10-03 0:44 ` Frank
2010-10-03 1:32 ` Chong Yidong
2010-10-03 3:44 ` Frank
2010-10-03 4:05 ` Chong Yidong
2010-10-03 4:14 ` Frank
2010-10-03 4:36 ` Juanma Barranquero
2010-10-03 10:28 ` Johan Bockgård [this message]
2010-10-03 14:55 ` Chong Yidong
2010-10-03 23:12 ` Stefan Monnier
2011-07-14 14:25 ` Lars Magne Ingebrigtsen
2011-07-14 16:24 ` Andreas Schwab
2011-07-17 3:16 ` Stefan Monnier
2011-07-17 8:15 ` Andreas Schwab
2011-07-18 15:30 ` Stefan Monnier
2011-07-21 19:25 ` Chong Yidong
2011-07-28 21:11 ` Andreas Schwab
2011-07-17 21:41 ` David De La Harpe Golden
2010-10-03 18:45 ` MON KEY
2010-10-03 18:56 ` Chong Yidong
2010-10-03 23:48 ` MON KEY
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