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Re: FreeBSD / libobj2 issue after update - all apps crash


From: Riccardo Mottola
Subject: Re: FreeBSD / libobj2 issue after update - all apps crash
Date: Thu, 6 Jun 2019 00:30:06 +0200
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0 SeaMonkey/2.49.4

Hi David!

David Chisnall wrote:

Can you do a backtrace of where the crash is?  What is the protocol that it's inspecting while crashing?

of course... here it is:

Program received signal SIGABRT, Aborted.
0x00000008028ca47a in thr_kill () from /lib/libc.so.7
(gdb) bt
#0  0x00000008028ca47a in thr_kill () from /lib/libc.so.7
#1  0x00000008028ca444 in raise () from /lib/libc.so.7
#2  0x00000008028ca3b9 in abort () from /lib/libc.so.7
#3  0x00000008029498e1 in __assert () from /lib/libc.so.7
#4  0x000000080218fe18 in protocol_getMethodDescription () from /usr/local/lib/libobjc.so.4.6 #5  0x000000080218fc9b in protocol_getMethodDescription () from /usr/local/lib/libobjc.so.4.6 #6  0x0000000801c9d532 in GSProtocolGetMethodDescriptionRecursive (aProtocol=0x8020a93d0, aSel=0x8020aa010,
    isRequired=1 '\001', isInstance=1 '\001') at GSObjCRuntime.m:827
#7  0x0000000801b80bd4 in -[NSDistantObject methodSignatureForSelector:] (self=0x80a98cf98,     _cmd=<value optimized out>, aSelector=0x8020aa010) at NSDistantObject.m:727 #8  0x0000000801c9b302 in GSFFIInvocationCallback (cif=0x80a9fff00, retp=0x7fffffffe420, args=0x7fffffffe2b0,
    user=0x80a86e4c8) at GSFFIInvocation.m:538
#9  0x00000008057c62ad in ffi_closure_unix64_inner () from /usr/local/lib/libffi.so.6 #10 0x00000008057c69d0 in ffi_closure_unix64 () from /usr/local/lib/libffi.so.6 #11 0x0000000801b82cb0 in -[NSDistributedNotificationCenter addObserver:selector:name:object:suspensionBehavior:] (     self=<value optimized out>, _cmd=<value optimized out>, anObserver=0x80a740548, aSelector=<value optimized out>,     notificationName=0x0, anObject=<value optimized out>, suspensionBehavior=2)
    at NSDistributedNotificationCenter.m:341
#12 0x0000000801b82999 in -[NSDistributedNotificationCenter addObserver:selector:name:object:] (self=0x80a841688,     _cmd=<value optimized out>, anObserver=<value optimized out>, aSelector=<value optimized out>,     notificationName=<value optimized out>, anObject=<value optimized out>) at NSDistributedNotificationCenter.m:266 #13 0x0000000801187ca9 in -[_GSWorkspaceCenter init] (self=0x80a740548, _cmd=<value optimized out>)
    at NSWorkspace.m:352
#14 0x0000000801189616 in -[NSWorkspace init] (self=0x80a7f8b98, _cmd=<value optimized out>) at NSWorkspace.m:755 #15 0x0000000801189433 in +[NSWorkspace sharedWorkspace] (self=<value optimized out>, _cmd=<value optimized out>)
    at NSWorkspace.m:703
#16 0x00000008010076e2 in -[NSApplication finishLaunching] (self=0x8088174c8, _cmd=<value optimized out>)
    at NSApplication.m:1104
#17 0x0000000801008e85 in -[NSApplication run] (self=0x8088174c8, _cmd=<value optimized out>) at NSApplication.m:1561 #18 0x0000000800fecd24 in NSApplicationMain (argc=<value optimized out>, argv=<value optimized out>) at Functions.m:91
#19 0x0000000000404985 in _start ()
#20 0x000000080062f000 in ?? ()
#21 0x0000000000000000 in ?? ()

it definitely has to do with distributed notifications, this is the protocol and its selector that are being looked up in frame #6

(gdb) po NSStringFromProtocol(aProtocol)
GDNCProtocol
(gdb) po NSStringFromSelector(aSel)
registerClient:

does this help you?

Riccardo



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