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bug#49053: Error (setf seq-elt) is already defined as something else tha
From: |
Juri Linkov |
Subject: |
bug#49053: Error (setf seq-elt) is already defined as something else than a generic function |
Date: |
Wed, 16 Jun 2021 00:59:18 +0300 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (x86_64-pc-linux-gnu) |
X-Debbugs-Cc: Stefan Monnier <monnier@iro.umontreal.ca>
I'm creating a new bug report because I was able to reproduce it.
>>> (setf (seq-elt plist ...))
>>>
>>> may help with that, though.
>>
>> BTW, often after pulling from master and recompiling,
>> Emacs fails to start with such errors:
>>
>> Debugger entered--Lisp error: (error "(setf seq-elt) is already defined as
>> something else than a generic function")
>> error("%s is already defined as something else than a generic function"
>> \(setf\ seq-elt\))
>> cl-generic-ensure-function(\(setf\ seq-elt\))
>> cl-generic-define-method(\(setf\ seq-elt\) nil (store (sequence array) n)
>> nil #f(compiled-function (store sequence n)
>
> Hmm....
>
> When you see that, could you show us the value of:
>
> (symbol-function '\(setf\ seq-elt\))
Here is what I did to reproduce the error:
1. Checked out 2f7a115a9c
2. make bootstrap
3. Checked out 794ec934a7
4. make (without bootstrap)
5. run emacs without -Q, i.e. with the init file
It terminated after printing to stderr:
(setf seq-elt) is already defined as something else than a generic function
6. run `emacs -Q`
(symbol-function '\(setf\ seq-elt\))
=> nil
7. loaded the init file from ~/.emacs
It printed to the *Messages* buffer:
Load error for /home/juri/.emacs:
(error (setf seq-elt) is already defined as something else than a generic
function)
Then evaluated symbol-function again that returned a different value:
(symbol-function '\(setf\ seq-elt\))
=> dummy
8. run again `emacs -Q` and tried to manually evaluate each expression
in the init file.
Then at one point, the byte-compiler compiled the file bytecomp.eln
in ~/.emacs.d/eln-cache. And the compiled bytecomp.eln completely
fixed the problem.
I guess some change between 2f7a115a9c and 794ec934a7 (maybe 663fb3b774)
changed the file bytecomp.el, so there was the need to recompile it.
- bug#49053: Error (setf seq-elt) is already defined as something else than a generic function,
Juri Linkov <=