From: Kaushal Modi <kaushal.modi@gmail.com>
To: Eli Zaretskii <eliz@gnu.org>
Cc: 23424@debbugs.gnu.org
Subject: bug#23424: 25.0.93; error in process sentinel with Melpa added to package-archives
Date: Mon, 02 May 2016 23:18:38 +0000 [thread overview]
Message-ID: <CAFyQvY0iBYW5stC0hgrN0WsX1cmk3TBi5B91Yz=O4pEAH=K4JQ@mail.gmail.com> (raw)
In-Reply-To: <CAFyQvY3WfB6=ejZ3GVxa+6tpfs0HE53gZtAK46Ot2t8yw2RP-g@mail.gmail.com>
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I was finally able to get the backtrace for end-of-file after rebuilding
emacs without those 2 assertion check flags.
>
So the last elisp-land function to propagate the error was in url-http.el:
=====
(defun url-http-activate-callback ()
"Activate callback specified when this buffer was created."
(url-http-mark-connection-as-free (url-host url-current-object)
(url-port url-current-object)
url-http-process)
(url-http-debug "Activating callback in buffer (%s): %S %S"
(buffer-name) url-callback-function url-callback-arguments)
(apply url-callback-function url-callback-arguments))
=====
I see that url-http-debug form but it is not run because the error appears
too soon and the user does not have change to hit C-g to make the info
print in url-http-debug. So how about printing that info if "(apply
url-callback-function url-callback-arguments)" results in error?
With the above "melpa-fake" archive from my gist.github.com and a modified
version of url-http-activate-callback as below:
=====
(defun url-http-activate-callback ()
"Activate callback specified when this buffer was created."
(url-http-mark-connection-as-free (url-host url-current-object)
(url-port url-current-object)
url-http-process)
(url-http-debug "Activating callback in buffer (%s): %S %S"
(buffer-name) url-callback-function url-callback-arguments)
(message "url-callback-function: %S" url-callback-function)
(apply url-callback-function url-callback-arguments))
=====
I get:
=====
url-callback-function: #[257 <byte-code> [("melpa-fake" . "
https://gist.githubusercontent.com/kaushalmodi/0603d601d84fc3282a34f08d3fe75f30/raw/597a359fba08dac61ff20e1ece6437b406a5a622/")
"archive-contents" t "
https://gist.githubusercontent.com/kaushalmodi/0603d601d84fc3282a34f08d3fe75f30/raw/597a359fba08dac61ff20e1ece6437b406a5a622/archive-contents"
package-user-dir package-check-signature require url-handlers
generate-new-buffer " *temp*" make-byte-code 0 <byte-code> vconcat vector
[buffer-name kill-buffer] 2 (error) plist-get :error error "Error
retrieving: %s %S" search-forward-regexp "^
?
?" nil noerror "incomprehensible buffer" url-insert-buffer-contents
kill-buffer t package--update-downloads-in-progress signal buffer-string
expand-file-name format "archives/%s" read-from-string make-directory
write-region silent package--check-signature 256 <byte-code> [write-region
nil silent mapconcat epg-signature-to-string "
" ".signed"] 7 "
(fn &optional GOOD-SIGS)" "\301\300!\207"
[package--update-downloads-in-progress] package-unsigned-archives] 20 "
(fn STATUS)"]
error in process filter: End of file during parsing [2 times]
=====
So can we have something like:
- If (apply url-callback-function url-callback-arguments) returns an
error, then extract the url being fetched from url-callback-function and
print some like "Error incurred when when processing XYZ url.". In this
case, we know that read-from-string threw an error. So we can even say that
the string fetched from XYZ url could not be parsed as a valid lisp form
(it does not necessarily mean that it read an empty string; in this case
the lisp form was incomplete).
The value of url-callback-function has a lot of other info which I do not
understand (I spy mainly the URL in it and "read-from-string" in it). But
may be using all the info in that var, we can have a well constructed error
message that can tell us what exactly went wrong. What do you think?
--
--
Kaushal Modi
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next prev parent reply other threads:[~2016-05-02 23:18 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-02 15:19 bug#23424: 25.0.93; error in process sentinel with Melpa added to package-archives Kaushal Modi
2016-05-02 15:49 ` Eli Zaretskii
2016-05-02 15:54 ` Robert Pluim
2016-05-02 16:23 ` Eli Zaretskii
2016-05-02 16:22 ` Kaushal Modi
2016-05-02 16:41 ` Kaushal Modi
2016-05-02 16:54 ` Kaushal Modi
2016-05-02 16:58 ` Eli Zaretskii
2016-05-02 17:22 ` Kaushal Modi
2016-05-02 20:19 ` Eli Zaretskii
2016-05-02 20:51 ` Kaushal Modi
2016-05-02 22:05 ` Kaushal Modi
2016-05-02 23:18 ` Kaushal Modi [this message]
2016-05-03 14:59 ` Eli Zaretskii
2016-05-03 15:12 ` Eli Zaretskii
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