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bug#19860: Acknowledgement (25.0.50; One url-retrieve-synchronously call
From: |
Dmitry Gutov |
Subject: |
bug#19860: Acknowledgement (25.0.50; One url-retrieve-synchronously call running concurrently with another can freeze it) |
Date: |
Mon, 16 Feb 2015 00:19:23 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:36.0) Gecko/20100101 Thunderbird/36.0 |
With debug-on-quit, pressing C-g during the wait yields:
Debugger entered--Lisp error: (quit)
(condition-case nil (let ((inhibit-quit nil)) (accept-process-output
proc)) (quit (setq quit-flag t) (eval (quote (ignore nil)))))
(or (condition-case nil (let ((inhibit-quit nil))
(accept-process-output proc)) (quit (setq quit-flag t) (eval (quote
(ignore nil))))) (null proc))
(if (or (condition-case nil (let ((inhibit-quit nil))
(accept-process-output proc)) (quit (setq quit-flag t) (eval (quote
(ignore nil))))) (null proc)) nil (if quit-flag (progn (delete-process
proc))) (setq proc (and (not quit-flag) (get-buffer-process
asynch-buffer))))
(if (buffer-local-value (quote url-redirect-buffer) asynch-buffer)
(setq proc (get-buffer-process (setq asynch-buffer (buffer-local-value
(quote url-redirect-buffer) asynch-buffer)))) (if (and proc (memq
(process-status proc) (quote (closed exit signal failed))) (eq proc (or
(get-buffer-process asynch-buffer) proc))) (progn (delete-process proc)
(setq retrieval-done t))) (if (or (condition-case nil (let
((inhibit-quit nil)) (accept-process-output proc)) (quit (setq quit-flag
t) (eval (quote (ignore nil))))) (null proc)) nil (if quit-flag (progn
(delete-process proc))) (setq proc (and (not quit-flag)
(get-buffer-process asynch-buffer)))))
(while (not retrieval-done) (url-debug (quote retrieval) "Spinning in
url-retrieve-synchronously: %S (%S)" retrieval-done asynch-buffer) (if
(buffer-local-value (quote url-redirect-buffer) asynch-buffer) (setq
proc (get-buffer-process (setq asynch-buffer (buffer-local-value (quote
url-redirect-buffer) asynch-buffer)))) (if (and proc (memq
(process-status proc) (quote (closed exit signal failed))) (eq proc (or
(get-buffer-process asynch-buffer) proc))) (progn (delete-process proc)
(setq retrieval-done t))) (if (or (condition-case nil (let
((inhibit-quit nil)) (accept-process-output proc)) (quit (setq quit-flag
t) (eval (quote ...)))) (null proc)) nil (if quit-flag (progn
(delete-process proc))) (setq proc (and (not quit-flag)
(get-buffer-process asynch-buffer))))))
(let ((proc (get-buffer-process asynch-buffer))) (while (not
retrieval-done) (url-debug (quote retrieval) "Spinning in
url-retrieve-synchronously: %S (%S)" retrieval-done asynch-buffer) (if
(buffer-local-value (quote url-redirect-buffer) asynch-buffer) (setq
proc (get-buffer-process (setq asynch-buffer (buffer-local-value (quote
url-redirect-buffer) asynch-buffer)))) (if (and proc (memq
(process-status proc) (quote (closed exit signal failed))) (eq proc (or
(get-buffer-process asynch-buffer) proc))) (progn (delete-process proc)
(setq retrieval-done t))) (if (or (condition-case nil (let (...)
(accept-process-output proc)) (quit (setq quit-flag t) (eval ...)))
(null proc)) nil (if quit-flag (progn (delete-process proc))) (setq proc
(and (not quit-flag) (get-buffer-process asynch-buffer)))))))
(if (null asynch-buffer) nil (let ((proc (get-buffer-process
asynch-buffer))) (while (not retrieval-done) (url-debug (quote
retrieval) "Spinning in url-retrieve-synchronously: %S (%S)"
retrieval-done asynch-buffer) (if (buffer-local-value (quote
url-redirect-buffer) asynch-buffer) (setq proc (get-buffer-process (setq
asynch-buffer (buffer-local-value ... asynch-buffer)))) (if (and proc
(memq (process-status proc) (quote ...)) (eq proc (or ... proc))) (progn
(delete-process proc) (setq retrieval-done t))) (if (or (condition-case
nil (let ... ...) (quit ... ...)) (null proc)) nil (if quit-flag (progn
(delete-process proc))) (setq proc (and (not quit-flag)
(get-buffer-process asynch-buffer))))))) asynch-buffer)
(let ((retrieval-done nil) (asynch-buffer nil)) (setq asynch-buffer
(url-retrieve url (function (lambda (&rest ignored) (url-debug (quote
retrieval) "Synchronous fetching done (%S)" (current-buffer)) (setq
retrieval-done t asynch-buffer (current-buffer)))) nil silent
inhibit-cookies)) (if (null asynch-buffer) nil (let ((proc
(get-buffer-process asynch-buffer))) (while (not retrieval-done)
(url-debug (quote retrieval) "Spinning in url-retrieve-synchronously: %S
(%S)" retrieval-done asynch-buffer) (if (buffer-local-value (quote
url-redirect-buffer) asynch-buffer) (setq proc (get-buffer-process (setq
asynch-buffer ...))) (if (and proc (memq ... ...) (eq proc ...)) (progn
(delete-process proc) (setq retrieval-done t))) (if (or (condition-case
nil ... ...) (null proc)) nil (if quit-flag (progn ...)) (setq proc (and
... ...)))))) asynch-buffer))
url-retrieve-synchronously("http://xip.io")
long-outer-op()
long-ops-now()