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bug#20457: compiler does not warn about arglist mismatch with obsolete a
From: |
Stefan Monnier |
Subject: |
bug#20457: compiler does not warn about arglist mismatch with obsolete alias |
Date: |
Sat, 05 Jun 2021 11:54:35 -0400 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) |
>> The problem seems to be more general than that -- it doesn't warn about
>> the wrong number of arguments, ever, if using aliases?
>>
>> Test case:
>>
>> (defun foo ())
>> (defalias 'bar 'foo)
>> (defun zot ()
>> (bar t))
>> (defun foobar ()
>> (foo t))
>>
>>
>> ----
>> Compiling file /tmp/warn.el at Fri May 28 02:26:55 2021
>>
>> In foobar:
>> warn.el:6:4: Warning: foo called with 1 argument, but accepts only 0
>> ----
>>
>> Note -- no warning from the zot function.
>>
>> It seems so odd that nobody has pointed this out before, so I'm
>> wondering if I'm just doing something obviously wrong in this test
>> case. Anybody?
>
> Stefan?
The byte-compiler's tracking of functions arity is quite limited, yes.
Patches to improve it are welcome.
Stefan
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