Subject: bug#50198: 27.2; 27.2; Crash in xwidget-webkit

From: Eli Zaretskii <[email-masked]>
Date: Wed, 25 Aug 2021 19:06:10 +0300

> From: Lars Ingebrigtsen <[email-masked]>
> Date: Wed, 25 Aug 2021 17:01:16 +0200
> Cc: [email-masked]
> 
> Cyber Knight <[email-masked]> writes:
> 
> > The crash happened only once and I couldn't reproduce it. 
> 
> That makes it pretty unlikely that we'll be able to debug this.  The
> backtrace ended with:
> 
> Backtrace:
> ./src/emacs(+0x147c21)[0x55774b974c21]
> ./src/emacs(+0x4563c)[0x55774b87263c]
> ./src/emacs(+0x45b0c)[0x55774b872b0c]
> ./src/emacs(+0x145d0d)[0x55774b972d0d]
> ./src/emacs(+0x145d89)[0x55774b972d89]
> /usr/lib/libjavascriptcoregtk-4.0.so.18(+0x169481f)[0x7efe50e7581f]
> /usr/lib/libpthread.so.0(+0x13870)[0x7efe4f1ac870]
> /usr/lib/libgobject-2.0.so.0(+0x2ea34)[0x7efe55b77a34]
> /usr/lib/libgobject-2.0.so.0(g_signal_emit_valist+0xe79)[0x7efe55b78c49]
> /usr/lib/libgobject-2.0.so.0(g_signal_emit+0x90)[0x7efe55b791a0]
> /usr/lib/libgobject-2.0.so.0(+0x1a266)[0x7efe55b63266]
> /usr/lib/libgobject-2.0.so.0(g_object_notify_by_pspec+0x152)
> [0x7efe55b64612]
> /usr/lib/libgtk-3.so.0(gtk_window_set_icon_list+0x89)[0x7efe564a2159]
> /usr/lib/libgtk-3.so.0(gtk_window_set_icon+0x8a)[0x7efe564a22aa]
> 
> So...  perhaps the crash happened in a callback from the webkit code?
> Anybody else have an idea here?

The node "Crashing" in the Emacs manual explains how to convert those
addresses into human-readable backtraces.  But the addr2line command
shown there must be run on the OP's machine for the output to make any
sense.