GNU bug report logs - #79739
31.0.50; Keyboard-interrupt may not work in inferior-python-mod

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: "John Haman" <mail <at> johnhaman.org>
To: bug-gnu-emacs <at> gnu.org
Subject: 31.0.50; Keyboard-interrupt may not work in inferior-python-mod
Date: Fri, 31 Oct 2025 08:24:49 -0400

Hello, I am unsure if this is a bug, or if this is a limitation of the
python interpreter. I would expect that `C-c C-c` cancels a running
python job in inferior-python-mode, but this seems to not work.

1. emacs -q
2. open a python buffer with the text

   while (True):
          print("True!")

3. `C-c C-p` in python buffer
4. `C-c C-c` in python buffer
5. Switch to inferior process buffer
6. `C-c C-c` in process buffer. Nothing happens.

Thanks!

---

In GNU Emacs 31.0.50 (build 2, x86_64-pc-linux-gnu, X toolkit, cairo
version 1.18.0, Xaw3d scroll bars) of 2025-10-02 built on JHAMAN2-LT
Repository revision: 8f7790a95ecd88efec97417f1a3b51ba9da5e287
Repository branch: master
Windowing system distributor 'HC-Consult', version 11.0.210110000
System Description: Ubuntu 24.04.3 LTS

Configured using:
'configure --with-x-toolkit=lucid 'CFLAGS=-O3 -fno-math-errno
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/home/john/.emacs.d/straight/build/eldoc/eldoc hides /usr/local/share/emacs/31.0.50/lisp/emacs-lisp/eldoc
/home/john/.emacs.d/straight/build/compat/compat hides /usr/local/share/emacs/31.0.50/lisp/emacs-lisp/compat

Features:
(shadow sort jinx mail-extr emacsbug lisp-mnt vertico-sort tramp-cmds
display-fill-column-indicator scroll-lock tempel-collection tempel
flymake direnv pyvenv eshell esh-cmd esh-ext esh-proc esh-opt esh-io
esh-arg esh-module esh-module-loaddefs esh-util magit-extras magit-todos
pcre2el rxt re-builder hl-todo f s async grep magit-bookmark
magit-submodule magit-blame magit-stash magit-reflog magit-bisect
magit-push magit-pull magit-fetch magit-clone magit-remote magit-commit
magit-sequence magit-notes magit-worktree magit-tag magit-merge
magit-branch magit-reset magit-files magit-refs magit-status magit
magit-repos magit-apply magit-wip magit-log which-func imenu magit-diff
smerge-mode diff git-commit log-edit message sendmail yank-media puny
dired dired-loaddefs rfc822 mml mml-sec epa derived epg rfc6068
epg-config gnus-util mm-decode mm-bodies mm-encode mail-parse rfc2231
rfc2047 rfc2045 mm-util ietf-drums mail-prsvr mailabbrev mail-utils
gmm-utils mailheader pcvs-util add-log magit-core magit-autorevert
magit-margin magit-transient magit-process with-editor server magit-mode
benchmark magit-git magit-base magit-section crm llama cond-let apheleia
apheleia-rcs apheleia-dp apheleia-formatters apheleia-utils apheleia-log
apheleia-formatter-context whitespace comp comp-cstr warnings
vertico-directory orderless vertico-repeat cursor-sensor consult compile
comp-run comp-common mule-util display-line-numbers tramp-cache
time-stamp tramp-sh tramp trampver tramp-integration tramp-message
tramp-compat shell parse-time iso8601 tramp-loaddefs vc-git
vc-dispatcher bookmark text-property-search lispy hydra lv delsel
lispy-inline avy etags fileloop edebug debug backtrace help-fns
radix-tree lispy-tags mode-local zoutline org ob ob-tangle ob-ref ob-lob
ob-table ob-exp org-macro org-src sh-script smie executable ob-comint
org-element-ast inline org-pcomplete pcomplete org-list org-footnote
org-faces org-entities time-date ob-emacs-lisp ob-core ob-eval org-cycle
org-table ol org-fold org-fold-core org-keys oc org-loaddefs find-func
cal-menu calendar cal-loaddefs org-version org-compat org-macs
smartparens loadhist thingatpt dash outli color noutline outline
olivetti face-remap repeat spacious-padding minions autorevert
filenotify saveplace cus-start recentf tree-widget prescient char-fold
corfu aggressive-indent super-save init marginalia vertico engine-mode
advice modus-themes no-littering use-package-bind-key bind-key
jth-install wgrep-autoloads vundo-autoloads vertico-autoloads
unfill-autoloads ultra-scroll-autoloads trashed-autoloads
tempel-collection-autoloads tempel-autoloads super-save-autoloads
sudo-edit-autoloads spacious-padding-autoloads smartparens-autoloads
slime-autoloads macrostep-autoloads rainbow-mode-autoloads
pyvenv-autoloads prescient-autoloads piem-autoloads pdf-tools-autoloads
let-alist-autoloads tablist-autoloads pandoc-mode-autoloads
outli-autoloads orglink-autoloads org-ql-autoloads peg-autoloads
ov-autoloads org-super-agenda-autoloads ts-autoloads map-autoloads
org-download-autoloads orderless-autoloads olivetti-autoloads
no-littering-autoloads move-text-autoloads modus-themes-autoloads
minions-autoloads marginalia-autoloads magit-todos-autoloads
pcre2el-autoloads hl-todo-autoloads async-autoloads magit-autoloads
with-editor-autoloads magit-section-autoloads llama-autoloads
cond-let-autoloads lsp-mode-autoloads markdown-mode-autoloads
spinner-autoloads ht-autoloads lispy-autoloads zoutline-autoloads
hydra-autoloads lv-autoloads swiper-autoloads ivy-autoloads
iedit-autoloads jinx-autoloads helpful-autoloads elisp-refs-autoloads
haskell-mode-autoloads guix-autoloads bui-autoloads gptel-autoloads
geiser-autoloads gcmh-autoloads expand-region-autoloads
eval-in-repl-autoloads paredit-autoloads ess-autoloads
engine-mode-autoloads embark-autoloads eglot-booster-autoloads
eglot-autoloads flymake-autoloads project-autoloads xref-autoloads
external-completion-autoloads eldoc-autoloads jsonrpc-autoloads
combobulate-autoloads combobulate-go combobulate-json combobulate-yaml
combobulate-css combobulate-js-ts combobulate-python combobulate-html
combobulate-toml combobulate-cursor combobulate-query savehist xref
files-x scheme combobulate-ui transient format-spec edmacro kmacro
combobulate-display combobulate-ztree combobulate-envelope
combobulate-manipulation python rx project compat pcase comint ansi-osc
ring ansi-color combobulate-procedure combobulate-navigation
combobulate-misc combobulate-setup tempo combobulate-interface
combobulate-settings diff-mode track-changes treesit generator
combobulate-rules edit-indirect-autoloads eat-autoloads
python-x-autoloads folding-autoloads direnv-autoloads debbugs-autoloads
soap-client-autoloads crux-autoloads corfu-autoloads consult-autoloads
citar-autoloads citeproc-autoloads string-inflection-autoloads
queue-autoloads f-autoloads s-autoloads dash-autoloads
parsebib-autoloads cape-autoloads buffer-env-autoloads auctex-autoloads
tex-site apheleia-autoloads easy-mmode aggressive-indent-autoloads
adaptive-wrap-autoloads ace-window-autoloads avy-autoloads finder-inf
hungry-delete-autoloads transient-autoloads compat-autoloads info
seq-autoloads straight-autoloads straight defuns browse-url xdg url
url-proxy url-privacy url-expand url-methods url-history url-cookie
generate-lisp-file url-domsuf url-util url-parse auth-source eieio
eieio-core password-cache json subr-x map byte-opt url-vars mailcap
cus-edit pp cus-load icons wid-edit cl-extra help-mode cl-seq
use-package-core bytecomp byte-compile cl-macs gv cl-loaddefs cl-lib
early-init rmc iso-transl tooltip cconv eldoc paren electric uniquify
ediff-hook vc-hooks lisp-float-type elisp-mode mwheel term/x-win x-win
term/common-win x-dnd touch-screen tool-bar dnd fontset image regexp-opt
fringe tabulated-list replace newcomment text-mode lisp-mode prog-mode
register page tab-bar menu-bar rfn-eshadow isearch easymenu timer select
scroll-bar mouse jit-lock font-lock syntax font-core term/tty-colors
frame minibuffer nadvice seq simple cl-generic indonesian philippine
cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao
korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech
european ethiopic indian cyrillic chinese composite emoji-zwj charscript
charprop case-table epa-hook jka-cmpr-hook help abbrev obarray oclosure
cl-preloaded button loaddefs theme-loaddefs faces cus-face macroexp
files window text-properties overlay sha1 md5 base64 format env
code-pages mule custom widget keymap hashtable-print-readable backquote
threads dbusbind inotify lcms2 dynamic-setting system-font-setting
font-render-setting cairo x-toolkit xinput2 x multi-tty move-toolbar
make-network-process tty-child-frames native-compile emacs)

Memory information:
((conses 16 748224 173139) (symbols 48 45643 1) (strings 32 178387 3800)
(string-bytes 1 6979267) (vectors 16 67147) (vector-slots 8 1241673 30927)
(floats 8 450 727) (intervals 56 9456 1964) (buffers 992 24))


--
John T. Haman
mail <at> johnhaman.org

Message #8 received at 79739 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: "John Haman" <mail <at> johnhaman.org>
Cc: 79739 <at> debbugs.gnu.org
Subject: Re: bug#79739: 31.0.50;
 Keyboard-interrupt may not work in inferior-python-mod
Date: Fri, 31 Oct 2025 16:46:57 +0200

> Date: Fri, 31 Oct 2025 08:24:49 -0400
> From: "John Haman" <mail <at> johnhaman.org>
> 
> Hello, I am unsure if this is a bug, or if this is a limitation of the
> python interpreter. I would expect that `C-c C-c` cancels a running
> python job in inferior-python-mode, but this seems to not work.
> 
> 1. emacs -q
> 2. open a python buffer with the text
> 
>    while (True):
>           print("True!")
> 
> 3. `C-c C-p` in python buffer
> 4. `C-c C-c` in python buffer
> 5. Switch to inferior process buffer
> 6. `C-c C-c` in process buffer. Nothing happens.

I cannot reproduce this here.  I get the expected:

  True!
  TruTraceback (most recent call last):
    File "<stdin>", line 1, in <module>
    File "<string>", line 17, in __PYTHON_EL_eval
    File "<string>", line 2, in <module>
  KeyboardInterrupt
  >>>

Message #11 received at 79739 <at> debbugs.gnu.org (full text, mbox):

From: "John Haman" <mail <at> johnhaman.org>
To: "Eli Zaretskii" <eliz <at> gnu.org>
Cc: 79739 <at> debbugs.gnu.org
Subject: Re: bug#79739: 31.0.50;
 Keyboard-interrupt may not work in inferior-python-mod
Date: Fri, 31 Oct 2025 10:50:10 -0400

On Fri, Oct 31, 2025, at 10:46 AM, Eli Zaretskii wrote:
>> Date: Fri, 31 Oct 2025 08:24:49 -0400
>> From: "John Haman" <mail <at> johnhaman.org>
>> 
>> Hello, I am unsure if this is a bug, or if this is a limitation of the
>> python interpreter. I would expect that `C-c C-c` cancels a running
>> python job in inferior-python-mode, but this seems to not work.
>> 
>> 1. emacs -q
>> 2. open a python buffer with the text
>> 
>>    while (True):
>>           print("True!")
>> 
>> 3. `C-c C-p` in python buffer
>> 4. `C-c C-c` in python buffer
>> 5. Switch to inferior process buffer
>> 6. `C-c C-c` in process buffer. Nothing happens.
>
> I cannot reproduce this here.  I get the expected:
>
>   True!
>   TruTraceback (most recent call last):
>     File "<stdin>", line 1, in <module>
>     File "<string>", line 17, in __PYTHON_EL_eval
>     File "<string>", line 2, in <module>
>   KeyboardInterrupt
>   >>>

Interesting, I am using Emacs on WSL1. I will do some more testing on my other installations. 

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