undocumented change in mapconcat

undocumented change in mapconcat

[Ulrich Neumerkel]

--text follows this line--

In GNU Emacs 21.1.2 (i686-pc-linux-gnu, X toolkit)
 of 2002-03-15 on a8.complang.tuwien.ac.at
configured using `configure  --prefix /usr/local --without-toolkit-scroll-bars'

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

in 20.7.2 (mapconcat 'identity '(1 10) ", ") yielded "1, 10"
but in 21.1.2 this gives an error

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Re: undocumented change in mapconcat

[David Kastrup]

ulrich@a0.complang.tuwien.ac.at (Ulrich Neumerkel) writes:

> --text follows this line--
> 
> In GNU Emacs 21.1.2 (i686-pc-linux-gnu, X toolkit)
>  of 2002-03-15 on a8.complang.tuwien.ac.at
> configured using `configure  --prefix /usr/local
>  --without-toolkit-scroll-bars'
> 
> Please describe exactly what actions triggered the bug
> and the precise symptoms of the bug:
> 
> in 20.7.2 (mapconcat 'identity '(1 10) ", ") yielded "1, 10"
> but in 21.1.2 this gives an error

This is not an undocumented change in mapconcat, but rather a
documented change in concat.  See the NEWS file:
** Code that uses `concat' with integer args now gets an error, as
long promised.

The solution, of course, is to use
(mapconcat 'int-to-string '(1 10) ", ")

-- 
David Kastrup, Kriemhildstr. 15, 44793 Bochum
Email: David.Kastrup@t-online.de

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Re: undocumented change in mapconcat

[Andreas Schwab]

Ulrich Neumerkel <ulrich@a0.complang.tuwien.ac.at> writes:

|> --text follows this line--
|> 
|> In GNU Emacs 21.1.2 (i686-pc-linux-gnu, X toolkit)
|>  of 2002-03-15 on a8.complang.tuwien.ac.at
|> configured using `configure  --prefix /usr/local --without-toolkit-scroll-bars'
|> 
|> Please describe exactly what actions triggered the bug
|> and the precise symptoms of the bug:
|> 
|> in 20.7.2 (mapconcat 'identity '(1 10) ", ") yielded "1, 10"
|> but in 21.1.2 this gives an error

`concat' does not stringize integers any more, this has been deprecated
for a long time already.  Use number-to-string as the map function.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE GmbH, Deutschherrnstr. 15-19, D-90429 Nürnberg
Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."

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