GNU bug report logs -
#33252
27.0.50; Recursive password prompt takes over
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Reported by: Juri Linkov <juri <at> linkov.net>
Date: Sun, 4 Nov 2018 00:38:02 UTC
Severity: normal
Tags: confirmed, fixed
Found in version 27.0.50
Fixed in version 27.1
Done: Lars Ingebrigtsen <larsi <at> gnus.org>
Bug is archived. No further changes may be made.
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Report forwarded
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bug-gnu-emacs <at> gnu.org
:
bug#33252
; Package
emacs
.
(Sun, 04 Nov 2018 00:38:02 GMT)
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Acknowledgement sent
to
Juri Linkov <juri <at> linkov.net>
:
New bug report received and forwarded. Copy sent to
bug-gnu-emacs <at> gnu.org
.
(Sun, 04 Nov 2018 00:38:02 GMT)
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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):
A bug in a shell script caused an infinitive stream of the same output lines:
Password: sh: 1: read: Illegal option -s
Password: sh: 1: read: Illegal option -s
Password: sh: 1: read: Illegal option -s
Password: sh: 1: read: Illegal option -s
Password: sh: 1: read: Illegal option -s
...
Currently Emacs handles such shell output very poorly and fails
with the following backtrace:
Debugger entered--Lisp error: (error "Variable binding depth exceeds max-specpdl-size")
read-string("(In buffer *shell*) Password: sh: 1: read: Ill..." nil t nil)
read-passwd("(In buffer *shell*) Password: sh: 1: read: Ill...")
comint-send-invisible("Password: sh: 1: read: Illegal option -s\nPassword:...")
comint-watch-for-password-prompt("Password: sh: 1: read: Illegal option -s\n\nPassword...")
run-hook-with-args(comint-watch-for-password-prompt "Password: sh: 1: read: Illegal option -s\n\nPassword...")
comint-output-filter(#<process shell<1>> "Password: sh: 1: read: Illegal option -s\n\nPassword...")
...
read-string("(In buffer *shell*) sh: 1: read: Illegal optio..." nil t nil)
read-passwd("(In buffer *shell*) sh: 1: read: Illegal optio...")
comint-send-invisible("sh: 1: read: Illegal option -s\nPassword: sh: 1: re...")
comint-watch-for-password-prompt("sh: 1: read: Illegal option -s\n\nPassword: sh: 1: r...")
run-hook-with-args(comint-watch-for-password-prompt "sh: 1: read: Illegal option -s\n\nPassword: sh: 1: r...")
comint-output-filter(#<process shell<1>> "sh: 1: read: Illegal option -s\n\nPassword: sh: 1: r...")
...
read-string("(In buffer *shell*) sh: 1: read: Illegal optio..." nil t nil)
read-passwd("(In buffer *shell*) sh: 1: read: Illegal optio...")
comint-send-invisible("sh: 1: read: Illegal option -s\nPassword: sh: 1: re...")
comint-watch-for-password-prompt("sh: 1: read: Illegal option -s\n\nPassword: sh: 1: r...")
run-hook-with-args(comint-watch-for-password-prompt "sh: 1: read: Illegal option -s\n\nPassword: sh: 1: r...")
comint-output-filter(#<process shell<1>> "sh: 1: read: Illegal option -s\n\nPassword: sh: 1: r...")
...
A reproducible short test case:
0. emacs -Q
1. M-&
while true; do echo -n "Password: "; sleep 1; done
RET
After 42 seconds Emacs session becomes completely unusable, and control
can be regained only after killing the shell script from outside Emacs.
Added tag(s) confirmed.
Request was from
Lars Ingebrigtsen <larsi <at> gnus.org>
to
control <at> debbugs.gnu.org
.
(Wed, 10 Jul 2019 13:15:02 GMT)
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Information forwarded
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bug-gnu-emacs <at> gnu.org
:
bug#33252
; Package
emacs
.
(Wed, 10 Jul 2019 13:25:01 GMT)
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Message #10 received at 33252 <at> debbugs.gnu.org (full text, mbox):
Juri Linkov <juri <at> linkov.net> writes:
> A reproducible short test case:
>
> 0. emacs -Q
>
> 1. M-&
> while true; do echo -n "Password: "; sleep 1; done
> RET
>
> After 42 seconds Emacs session becomes completely unusable, and control
> can be regained only after killing the shell script from outside Emacs.
I've now added a recursion check to the comint prompting, and it'll stop
adding new prompts when it's ten layers deep, which will allow the user
to kill the shell script.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
Added tag(s) fixed.
Request was from
Lars Ingebrigtsen <larsi <at> gnus.org>
to
control <at> debbugs.gnu.org
.
(Wed, 10 Jul 2019 13:25:02 GMT)
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bug marked as fixed in version 27.1, send any further explanations to
33252 <at> debbugs.gnu.org and Juri Linkov <juri <at> linkov.net>
Request was from
Lars Ingebrigtsen <larsi <at> gnus.org>
to
control <at> debbugs.gnu.org
.
(Wed, 10 Jul 2019 13:25:02 GMT)
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bug archived.
Request was from
Debbugs Internal Request <help-debbugs <at> gnu.org>
to
internal_control <at> debbugs.gnu.org
.
(Thu, 08 Aug 2019 11:24:05 GMT)
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This bug report was last modified 4 years and 262 days ago.
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