Emacs freezes when opening a python file reddit / emacs ---------------------------------------------------------------------- ckoneru · 2022-11-21 04:06 Hello, I am using `emacs-28.2` and after updating my packages today, I have been experiencing this issue. I am not able to pinpoint the culprit package here. EDIT: `emacs -Q` will give you the same result. EDIT 2: This does NOT persist in `emacs-28.1` tag and `master` branch. Only persists in `emacs-28.2` tag and `emacs-28` branch. ### Steps to reproduce 1. Upgrade packages 2. restart-emacs 3. M-x `toggle-debug-on-error` 4. M-x `toggle-debug-on-quit` 5. M-x `profiler-start` 6. M-x `pyvenv-workon` (only if you have it) 7. Open a python file in a directory 8. Emacs freezes 9. Open terminal and run `pkill -SIGUSR2 emacs` 10. you will see stack-trace in emacs, `profiler-stop` and `profiler- report` will give you results like below # error Debugger entered--entering a function: * #f(compiled-function () #)() syntax-ppss() python-nav-end-of-statement() python-nav-end-of-block() python-info-statement-ends-block-p() python-nav--forward-sexp(-1 nil nil) python-nav-forward-sexp(-1 nil nil) python-nav-backward-sexp() python-info-docstring-p((0 nil 690 34 nil nil 0 nil 699 nil nil)) python-font-lock-syntactic-face-function((0 nil 690 34 nil nil 0 nil 699 nil nil)) font-lock-fontify-syntactically-region(1 1527 nil) font-lock-default-fontify-region(1 1501 nil) font-lock-fontify-region(1 1501) #f(compiled-function (fun) #)(font- lock-fontify-region) jit-lock--run-functions(1 1501) jit-lock-fontify-now(1 1501) jit-lock-function(1) redisplay_internal\ \(C\ function\)() # part of profiler report 74,785,659 93% - redisplay_internal (C function) 74,515,935 93% - jit-lock-function 74,515,935 93% - jit-lock-fontify-now 74,515,935 93% - jit-lock--run-functions 74,515,935 93% - # 74,515,935 93% - font-lock-fontify-region 74,515,935 93% - font-lock-default-fontify-region 74,515,935 93% - font-lock-fontify-syntactically-region 74,514,890 93% - python-font-lock-syntactic-face- function 74,512,026 93% - python-info-docstring-p 74,501,690 93% - python-nav-backward-sexp 74,501,690 93% - python-nav-forward-sexp 74,497,546 93% - python-nav--forward-sexp 74,453,034 93% - python-info-statement-ends-block-p 66,684,154 83% - python-nav-end-of-block 66,678,666 83% - python-nav-end-of-statement 60,299,610 75% - syntax-ppss 44,359,226 55% - # 44,354,842 55% - debug 34,863,559 43% - recursive-edit 31,921,033 39% - command-execute 31,921,033 39% - apply 31,921,033 39% - ad-Advice-command-execute 31,921,033 39% - # 31,920,953 39% - funcall-interactively 24,406,156 30% - dashboard-return 24,406,156 30% - widget-button-press 24,406,156 30% - widget-apply-action 24,406,156 30% - # 24,406,156 30% - find-file-existing 24,406,156 30% - find-file 24,406,156 30% - apply 24,406,156 30% - ad-Advice-find- file 24,406,156 30% - # 24,348,820 30% - find-file- noselect 24,348,820 30% - apply 24,348,820 30% - editorconfig--advice-find-file-noselect 24,347,668 30% - apply 24,347,668 30% - # 24,338,311 30% - find- file-noselect-1 24,265,479 30% - after- find-file 16,786,860 20% - normal-mode 16,597,805 20% - set- auto-mode 16,597,805 20% - apply 16,597,805 20% - so- long--set-auto-mode 16,529,430 20% - # 16,358,501 20% - set-auto-mode--apply-alist 16,229,961 20% - set-auto-mode-0 16,229,521 20% - python-mode 16,188,034 20% - run-mode-hooks 10,854,815 13% - run-hooks 6,530,299 8% - yas-global-mode-enable-in-buffers 6,530,299 8% - yas-minor-mode-on 6,530,299 8% - yas-minor-mode 6,529,377 8% - yas--load-pending-jits 6,529,377 8% - # 6,529,377 8% - apply 6,529,377 8% - yas--load-directory-1 6,527,329 8% - yas--load-directory-2 4,334,886 5% - insert-file-contents 4,334,886 5% - apply 3,720,566 4% - editorconfig--advice-insert-file-contents 1,549,624 1% - # 1,453,368 1% - set-auto-coding 1,453,368 1% - find-auto-coding 505,832 0% - auto-coding-regexp-alist-lookup 505,832 0% - search-forward-regexp 505,832 0% - apply 505,832 0% ad-Advice-search-forward-regexp 114,032 0% - sgml-html-meta-auto-coding-function 112,624 0% - search-forward-regexp 112,624 0% - apply 112,624 0% ad-Advice-search-forward-regexp 1,408 0% - forward-line 1,408 0% - apply 1,408 0% ad-Advice-forward-line ---------------------------------------------------------------------- ghostwail · 2022-11-21 16:57 Does `HOME=/tmp emacs` give the same issue? ---------------------------------------------------------------------- eli-zaretskii · 2022-11-21 17:49 I think this is a known bug that is fixed for Emacs 29. ---------------------------------------------------------------------- ckoneru · 2022-11-21 18:45 Thanks u/eli-zaretskii. Was this bug introduced in emacs-28.2? ---------------------------------------------------------------------- mkleehammer · 2022-11-22 02:37 Is there an open triple quote? I could hang some versions by deleting the closing triple quote to move it. Had to restart and open the file literally, fix it, and then, reopen. ---------------------------------------------------------------------- ckoneru · 2022-11-22 05:19 Yes, there is a triple quote ---------------------------------------------------------------------- eli-zaretskii · 2022-11-22 19:12 I don't know when it was introduced. I just know that it exists in Emacs 28, but not in Emacs 29.