--- Begin Message ---
|
Subject: |
28.0.50; elisp capf error "Wrong type argument: listp, elisp--witness--lisp" |
|
Date: |
Fri, 13 Aug 2021 03:25:42 +0200 |
Steps to reproduce:
1. Start "emacs -Q"
2. Enter "(defmacro foo bar" in the scratch buffer
3. Press M-<tab> to invoke 'completion-at-point'
The capf will throw the error "Wrong type argument: listp,
elisp--witness--lisp". This error will be shown on Emacs 27 and Emacs 28.
The input is nonsensical. I hit this while experimenting with my Corfu
completion UI package. A capf should never error in case no completion
is possible, such that another completion function of lower priority
registered in 'completion-at-point-functions' can take over.
Stack trace:
Debugger entered--Lisp error: (wrong-type-argument listp
elisp--witness--lisp)
remq(&rest elisp--witness--lisp)
elisp--local-variables-1(nil (lambda elisp--witness--lisp nil))
#f(compiled-function (vars sexp) #<bytecode -0x8b1fe1acbf9337e>)(nil
(#'(lambda elisp--witness--lisp nil)))
elisp--local-variables-1(nil #'(lambda elisp--witness--lisp nil))
#f(compiled-function (vars sexp) #<bytecode -0x8b1fe1acbf9337e>)(nil
((cons 'macro #'(lambda elisp--witness--lisp nil))))
elisp--local-variables-1(nil (cons 'macro #'(lambda
elisp--witness--lisp nil)))
#f(compiled-function (vars sexp) #<bytecode -0x8b1fe1acbf9337e>)(nil
((defalias 'foo (cons 'macro #'(lambda elisp--witness--lisp nil)))))
elisp--local-variables-1(nil (defalias 'foo (cons 'macro #'(lambda
elisp--witness--lisp nil))))
elisp--local-variables()
#f(compiled-function (string) #<bytecode 0x11ce5f9950685161>)(#("bar"
0 3 (fontified t)))
#f(compiled-function (string pred action) #<bytecode
0x1441a5b45360593c>)(#("bar" 0 3 (fontified t)) nil nil)
try-completion(#("bar" 0 3 (fontified t)) #f(compiled-function (string
pred action) #<bytecode 0x1441a5b45360593c>) nil)
#f(compiled-function (table) #<bytecode
0x16347446532ce382>)(#f(compiled-function (string pred action)
#<bytecode 0x1441a5b45360593c>))
mapcar(#f(compiled-function (table) #<bytecode 0x16347446532ce382>)
(#f(compiled-function (string pred action) #<bytecode
0x1441a5b45360593c>) #f(compiled-function (&rest args2) #<bytecode
-0xb6f918caeb61f7c>)))
#f(compiled-function (string pred action) #<bytecode
0x129f647999b6137>)(#("bar" 0 3 (fontified t)) nil nil)
try-completion(#("bar" 0 3 (fontified t)) #f(compiled-function (string
pred action) #<bytecode 0x129f647999b6137>) nil)
completion-basic-try-completion(#("bar" 0 3 (fontified t))
#f(compiled-function (string pred action) #<bytecode 0x129f647999b6137>)
nil 3)
#f(compiled-function (style) #<bytecode -0x1fb7ebf98eadbd47>)(basic)
completion--some(#f(compiled-function (style) #<bytecode
-0x1fb7ebf98eadbd47>) (basic partial-completion emacs22))
completion--nth-completion(1 #("bar" 0 3 (fontified t))
#f(compiled-function (string pred action) #<bytecode 0x129f647999b6137>)
nil 3 (metadata))
completion-try-completion(#("bar" 0 3 (fontified t))
#f(compiled-function (string pred action) #<bytecode 0x129f647999b6137>)
nil 3 (metadata))
completion--do-completion(#<marker at 160 in *scratch*> 163)
completion--in-region-1(#<marker at 160 in *scratch*> 163)
#f(compiled-function (start end collection predicate) #<bytecode
-0xf6d24f3ba2b80f7>)(#<marker at 160 in *scratch*> 163
#f(compiled-function (string pred action) #<bytecode 0x129f647999b6137>)
nil)
apply(#f(compiled-function (start end collection predicate) #<bytecode
-0xf6d24f3ba2b80f7>) (#<marker at 160 in *scratch*> 163
#f(compiled-function (string pred action) #<bytecode 0x129f647999b6137>)
nil))
#f(compiled-function (funs global args) #<bytecode
-0xbd1d687a6b6022>)(nil nil (#<marker at 160 in *scratch*> 163
#f(compiled-function (string pred action) #<bytecode 0x129f647999b6137>)
nil))
completion--in-region(#<marker at 160 in *scratch*> 163
#f(compiled-function (string pred action) #<bytecode 0x129f647999b6137>)
nil)
completion-in-region(#<marker at 160 in *scratch*> 163
#f(compiled-function (string pred action) #<bytecode 0x129f647999b6137>)
nil)
completion-at-point()
In GNU Emacs 28.0.50 (build 54, x86_64-pc-linux-gnu, GTK+ Version
3.24.5, cairo version 1.16.0)
of 2021-08-12 built on projects
Windowing system distributor 'The X.Org Foundation', version 11.0.12004000
System Description: Debian GNU/Linux 10 (buster)
--- End Message ---
--- Begin Message ---
|
Subject: |
Re: bug#50034: 28.0.50; elisp capf error "Wrong type argument: listp, elisp--witness--lisp" |
|
Date: |
Tue, 23 Aug 2022 10:17:52 -0400 |
|
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) |
> Slightly simpler repro:
>
> (defmacro foo bar
> M-: (elisp--local-variables) RET
>
> It fails here:
>
> (`(lambda ,args . ,body)
> (elisp--local-variables-1
> (append (remq '&optional (remq '&rest args)) vars)
> (car (last body))))
>
> where it expects args to be a list, but it's the symbol
> `elisp--witness--lisp'.
Since the code can be completely non-sensical, `elisp--local-variables`
shouldn't presume that the arglist is indeed a list. I installed the fix
below on `master`.
Stefan
diff --git a/lisp/progmodes/elisp-mode.el b/lisp/progmodes/elisp-mode.el
index 0c4a9bfdbea..6d8ced7f220 100644
--- a/lisp/progmodes/elisp-mode.el
+++ b/lisp/progmodes/elisp-mode.el
@@ -383,7 +383,9 @@ elisp--local-variables-1
(setq sexp nil))
(`(lambda ,args . ,body)
(elisp--local-variables-1
- (append (remq '&optional (remq '&rest args)) vars)
+ (let ((args (if (listp args) args)))
+ ;; FIXME: Exit the loop if witness is in args.
+ (append (remq '&optional (remq '&rest args)) vars))
(car (last body))))
(`(condition-case ,_ ,e) (elisp--local-variables-1 vars e))
(`(condition-case ,v ,_ . ,catches)
--- End Message ---