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bug#12751: 24.2.50; Inferior python mode hangs
From: |
Jorgen Schaefer |
Subject: |
bug#12751: 24.2.50; Inferior python mode hangs |
Date: |
Sun, 28 Oct 2012 19:37:40 +0100 |
Hello!
In current Emacs from bzr, running M-x run-python hangs Emacs until the
user hits C-g, repeatedly, every time there is input to the subprocess.
This results in the following message (from *Messages*):
Error during redisplay: (jit-lock-function 1) signaled (quit)
Error during redisplay: (jit-lock-function 256) signaled (quit)
Error during redisplay: (jit-lock-function 274) signaled (quit)
Error during redisplay: (jit-lock-function 275) signaled (quit)
Quit [3 times]
QuitError during redisplay: (jit-lock-function 284) signaled (quit)
Error during redisplay: (jit-lock-function 285) signaled (quit)
....
The problem seems to be in `inferior-python-mode'. Setting
`python-shell-enable-font-lock' to nil fixes it immediately. More
specifically, in this piece of code:
(set (make-local-variable 'syntax-propertize-function)
(syntax-propertize-rules
(comint-prompt-regexp
(0 (ignore
(put-text-property
comint-last-input-start end 'syntax-table
python-shell-output-syntax-table)
(font-lock-unfontify-region comint-last-input-start end))))
((python-rx string-delimiter)
(0 (ignore
(and (not (eq (get-text-property start 'field) 'output))
(python-syntax-stringify)))))
))
The (comint-promot-regexp ...) clause seems to be causing the problem.
Commenting that out makes the subprocess run fine.
I have to admit I have no idea what that's supposed to do anyhow. The
variable END isn't defined at all, and `ignore' will make it all nil
anyhow. But maybe I'm missing something important.
Regards,
Jorgen
- bug#12751: 24.2.50; Inferior python mode hangs,
Jorgen Schaefer <=