Error when completing C-h f

Error when completing C-h f

[Yuri D'Elia]

On the current master, I noticed this error when completing for some
function names, such as ``C-h f package-'':

Debugger entered--Lisp error: (wrong-type-argument stringp nil)
  string-match("\\(\\`\\|/\\)package-x\\(\\.elc\\|\\.el\\|\\.so\\)?\\(\\.gz\\)?\\'" nil nil)
  help--loaded-p("package-x")
  help--load-prefixes((("package-" "package-x" "package")))
  help--symbol-completion-table("package-" #[257 "\300!\206	\211\301N\207" [fboundp function-documentation] 3 "\n\n(fn F)"] lambda)
  test-completion("package-" help--symbol-completion-table #[257 "\300!\206	\211\301N\207" [fboundp function-documentation] 3 "\n\n(fn F)"])
  completion--do-completion(20 27)

It seems that I have a bare (nil) in the load-history, which
help--loaded-p doesn't like.

Is this expected?
This doesn't occur on emacs 25.1

Re: Error when completing C-h f

[Kaushal Modi]

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Which commit are you on?

I am on the b2b3159 build "mm-decode.el: Simplify regexp used to search
html meta tag" .. cannot recreate this problem in emacs -Q or with my
config loaded:

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On Mon, Feb 20, 2017 at 11:55 AM Yuri D'Elia <wavexx@thregr.org> wrote:

> On the current master, I noticed this error when completing for some
> function names, such as ``C-h f package-'':
>
> Debugger entered--Lisp error: (wrong-type-argument stringp nil)
>
> string-match("\\(\\`\\|/\\)package-x\\(\\.elc\\|\\.el\\|\\.so\\)?\\(\\.gz\\)?\\'"
> nil nil)
>   help--loaded-p("package-x")
>   help--load-prefixes((("package-" "package-x" "package")))
>   help--symbol-completion-table("package-" #[257 "\300!\206
>  \211\301N\207" [fboundp function-documentation] 3 "\n\n(fn F)"] lambda)
>   test-completion("package-" help--symbol-completion-table #[257
> "\300!\206     \211\301N\207" [fboundp function-documentation] 3 "\n\n(fn
> F)"])
>   completion--do-completion(20 27)
>
> It seems that I have a bare (nil) in the load-history, which
> help--loaded-p doesn't like.
>
> Is this expected?
> This doesn't occur on emacs 25.1
>
>
> --

Kaushal Modi

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Re: Error when completing C-h f

[Yuri D'Elia]

On Mon, Feb 20 2017, Kaushal Modi wrote:
> Which commit are you on?
>
> I am on the b2b3159 build "mm-decode.el: Simplify regexp used to search
> html meta tag" .. cannot recreate this problem in emacs -Q or with my
> config loaded:

I'm on 589bd0c22b2d55c3d0339221f67235b33be93f68.

I cannot replicate this with -Q either, so there's something that is
triggered by my setup.

However, emacs25 (from debian unstable) on the same configuration does
not trigger the issue.

Re: Error when completing C-h f

[Michael Heerdegen]

Yuri D'Elia <wavexx@thregr.org> writes:

> It seems that I have a bare (nil) in the load-history, which
> help--loaded-p doesn't like.

Seems `help--loaded-p' does not handle an (nil ...) entry correctly in
the `dolist'.  Looks like an obvious bug to me.


Michael.

Re: Error when completing C-h f

[Richard Copley]

On 21 February 2017 at 03:10, Michael Heerdegen
<michael_heerdegen@web.de> wrote:
> Yuri D'Elia <wavexx@thregr.org> writes:
>
>> It seems that I have a bare (nil) in the load-history, which
>> help--loaded-p doesn't like.
>
> Seems `help--loaded-p' does not handle an (nil ...) entry correctly in
> the `dolist'.  Looks like an obvious bug to me.

Are bug reports out of fashion?

To reproduce in "emacs -Q":

(defun test () "" nil) ;; insert text in buffer *scratch*
C-M-x ;; eval-defun (adds an entry to load-history with null file)
C-h f package- TAB ;; crashes