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bug#33530: 26.1.90; D-Bus crashes Emacs: consp, Fatal error 7: Bus error
From: |
Eli Zaretskii |
Subject: |
bug#33530: 26.1.90; D-Bus crashes Emacs: consp, Fatal error 7: Bus error |
Date: |
Wed, 28 Nov 2018 08:16:00 +0200 |
> From: Damien Cassou <damien@cassou.me>
> Date: Tue, 27 Nov 2018 21:59:01 +0100
> Cc: Paul Eggert <eggert@cs.ucla.edu>, Michael Albinus <michael.albinus@gmx.de>
>
> The following line crashes both Emacs 26 and Emacs master.
>
> emacs -Q -batch --eval "(require 'dbus)" --eval "(dbus-call-method :system
> \"org.freedesktop.NetworkManager\"
> \"/org/freedesktop/NetworkManager/Devices/1\"
> \"org.freedesktop.NetworkManager.Device.Wireless\" \"RequestScan\"
> :dict-entry)"
It dies trying to display an error message:
> #5 0x0000000000674b2d in print_error_message (data=XIL(0x13472d3),
> stream=XIL(0x58b0), context=0xbc093e <pure+3999998> "", caller=XIL(0x2a90))
> at print.c:980
> obj = XIL(0xc8c7000c8421c6c5)
> sep = 0x786fef ", "
> errname = XIL(0xe3a0)
> errmsg = XIL(0x7fb874)
> file_error = XIL(0)
> tail = XIL(0x13473b3)
> #6 0x0000000000591321 in Fcommand_error_default_function
> (data=XIL(0x13472d3), context=XIL(0x7f0064), signal=XIL(0x2a90)) at
> keyboard.c:1005
> sf = 0xce2830 <bss_sbrk_buffer+511280>
> #7 0x00000000006485fa in funcall_subr (subr=0x7ebe80
> <Scommand_error_default_function>, numargs=3, args=0x7fffffffce48) at
> eval.c:2939
> internal_argbuf = {XIL(0x7fffffffcdb0), make_number(16107774448),
> XIL(0x7ebe80), XIL(0x7fffffffcd78), XIL(0x58716b), XIL(0xf00000000),
> XIL(0x7ebe85), XIL(0x7fffffffcd90)}
> internal_args = 0x7fffffffce48
> #8 0x00000000006480ef in Ffuncall (nargs=4, args=0x7fffffffce40) at
> eval.c:2859
> fun = XIL(0x7ebe85)
> original_fun = XIL(0x9a9d0)
> funcar = XIL(0x7fffffffceb0)
> numargs = 3
> val = XIL(0)
> count = 3
> #9 0x0000000000647a93 in call3 (fn=XIL(0x9a9d0), arg1=XIL(0x13472d3),
> arg2=XIL(0x7f0064), arg3=XIL(0x2a90)) at eval.c:2726
> #10 0x00000000005911d8 in cmd_error_internal (data=XIL(0x13472d3),
> context=0x7fffffffceb0 "") at keyboard.c:972
> #11 0x00000000005910b7 in cmd_error (data=XIL(0x13472d3)) at keyboard.c:941
> old_level = XIL(0)
> old_length = XIL(0)
> macroerror = "\000\316\377\377\001", '\000' <repeats 12 times>,
> "\317\377\377\377\177\000\000s_d", '\000' <repeats 13 times>,
> "ӛ1\001\000\000\000\000", <incomplete sequence \317>
Can you please show the value of 'data' in frame #10 or in frame #5,
in human-readable form? This should be possible using the "xtype"
command followed by another x* command, according to what type is
shown by "xtype", probably "xsymbol".
Thanks.