Subject: bug#28176: 26.0.50; Emacs hangs on entering a specific article in gnus

From: Eli Zaretskii <[email-masked]>
Date: Tue, 22 Aug 2017 18:09:46 +0300

> From: Sam Steingold <[email-masked]>
> Cc: [email-masked]
> Date: Mon, 21 Aug 2017 15:40:41 -0400
> 
> (lldb) bt
> * thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGSTOP
>     frame #0: 0x0000000100030788 emacs`display_mode_element(it=0x00007fff5fbf8258, depth=8, field_width=0, precision=<unavailable>, elt=4328980291, props=4412454691, risky=<unavailable>) at xdisp.c:23603 [opt]
>     frame #1: 0x00000001000309d0 emacs`display_mode_element(it=0x00007fff5fbf8258, depth=<unavailable>, field_width=0, precision=<unavailable>, elt=<unavailable>, props=4412454691, risky=<unavailable>) at xdisp.c:23692 [opt]
>     frame #2: 0x00000001000309d0 emacs`display_mode_element(it=0x00007fff5fbf8258, depth=<unavailable>, field_width=0, precision=<unavailable>, elt=<unavailable>, props=4412454691, risky=<unavailable>) at xdisp.c:23692 [opt]
>     frame #3: 0x0000000100030b05 emacs`display_mode_element(it=0x00007fff5fbf8258, depth=4, field_width=0, precision=-66, elt=<unavailable>, props=0, risky=<unavailable>) at xdisp.c:23629 [opt]
>     frame #4: 0x00000001000309d0 emacs`display_mode_element(it=0x00007fff5fbf8258, depth=<unavailable>, field_width=0, precision=<unavailable>, elt=<unavailable>, props=0, risky=<unavailable>) at xdisp.c:23692 [opt]
>     frame #5: 0x00000001000309d0 emacs`display_mode_element(it=0x00007fff5fbf8258, depth=<unavailable>, field_width=0, precision=<unavailable>, elt=<unavailable>, props=0, risky=<unavailable>) at xdisp.c:23692 [opt]
>     frame #6: 0x000000010001bf09 emacs`display_mode_line(w=0x000000010482ea30, face_id=MODE_LINE_FACE_ID, format=4315887955) at xdisp.c:23211 [opt]
>     frame #7: 0x000000010004b2e4 emacs`display_mode_lines(w=0x000000010482ea30) at xdisp.c:23146 [opt]
>     frame #8: 0x000000010005180f emacs`redisplay_window(window=4370655797, just_this_one_p=<unavailable>) at xdisp.c:17397 [opt]

This just says that Emacs was in redisplay, displaying the mode line
in some window.

Do you always see this exact backtrace, with the same function calls
and the same arguments, when you interrupt Emacs that hangs like this?
Or does the backtrace look different every time?

Thanks.