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bug#1653: 23.0.60; encoding system nil != no-conversion, is it deliberat
bug#1653: 23.0.60; encoding system nil != no-conversion, is it deliberately?
Sun, 21 Dec 2008 21:57:37 -0500
Gnus/5.13 (Gnus v5.13) Emacs/23.0.60 (gnu/linux)
> In emacs23, setting a encoding system to nil doesn't behaver the same
> as setting it to no-conversion.
> For example: (setq default-process-coding-system '(nil . utf-8))
> and (setq default-process-coding-system '(no-conversion . utf-8))
> have differenct effects on the following "call-process".
> Is this deliberately? is there any good reason?
> This setting will break quite a lot of 3rd party .el plugins
> (emms/unicad etc), which usually set
> xxxxxxxx-default-encoding-system's default value to nil.
Why would anybody use nil to mean `binary' aka `no-conversion' aka
`raw-text-unix'? In this context, nil should simply mean "the coding
system is not specified by this variable, so keep looking for other
clues to figure out which coding system to use".