+[NSUndoManager(NSInternal) _endTopLevelGroupings] is only safe to invoke on the main thread.

[emersion]

2016-07-21 13:07:15.965 main[2119:2088547] *** Assertion failure in +[NSUndoManager _endTopLevelGroupings], /Library/Caches/com.apple.xbs/Sources/Foundation/Foundation-1259/Misc.subproj/NSUndoManager.m:359
2016-07-21 13:07:15.966 main[2119:2088547] +[NSUndoManager(NSInternal) _endTopLevelGroupings] is only safe to invoke on the main thread.
2016-07-21 13:07:15.971 main[2119:2088547] (
    0   CoreFoundation                      0x00007fff94e394f2 __exceptionPreprocess + 178
    1   libobjc.A.dylib                     0x00007fff8d8d773c objc_exception_throw + 48
    2   CoreFoundation                      0x00007fff94e3e1ca +[NSException raise:format:arguments:] + 106
    3   Foundation                          0x00007fff9b0ca856 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 198
    4   Foundation                          0x00007fff9b04faf1 +[NSUndoManager(NSPrivate) _endTopLevelGroupings] + 170
    5   AppKit                              0x00007fff9256c31c _DPSNextEvent + 2385
    6   AppKit                              0x00007fff9256b226 -[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 454
    7   AppKit                              0x00007fff9255fd80 -[NSApplication run] + 682
    8   main                                0x0000000004453b8b uiMain + 43
    9   main                                0x000000000405da70 runtime.asmcgocall + 112
)
2016-07-21 13:07:15.971 main[2119:2088547] *** Assertion failure in +[NSUndoManager _endTopLevelGroupings], /Library/Caches/com.apple.xbs/Sources/Foundation/Foundation-1259/Misc.subproj/NSUndoManager.m:359
2016-07-21 13:07:15.972 main[2119:2088547] An uncaught exception was raised
2016-07-21 13:07:15.973 main[2119:2088547] +[NSUndoManager(NSInternal) _endTopLevelGroupings] is only safe to invoke on the main thread.
2016-07-21 13:07:15.973 main[2119:2088547] (
    0   CoreFoundation                      0x00007fff94e394f2 __exceptionPreprocess + 178
    1   libobjc.A.dylib                     0x00007fff8d8d773c objc_exception_throw + 48
    2   CoreFoundation                      0x00007fff94e3e1ca +[NSException raise:format:arguments:] + 106
    3   Foundation                          0x00007fff9b0ca856 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 198
    4   Foundation                          0x00007fff9b04faf1 +[NSUndoManager(NSPrivate) _endTopLevelGroupings] + 170
    5   AppKit                              0x00007fff9255febe -[NSApplication run] + 1000
    6   main                                0x0000000004453b8b uiMain + 43
    7   main                                0x000000000405da70 runtime.asmcgocall + 112
)
2016-07-21 13:07:15.973 main[2119:2088547] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '+[NSUndoManager(NSInternal) _endTopLevelGroupings] is only safe to invoke on the main thread.'
*** First throw call stack:
(
    0   CoreFoundation                      0x00007fff94e394f2 __exceptionPreprocess + 178
    1   libobjc.A.dylib                     0x00007fff8d8d773c objc_exception_throw + 48
    2   CoreFoundation                      0x00007fff94e3e1ca +[NSException raise:format:arguments:] + 106
    3   Foundation                          0x00007fff9b0ca856 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 198
    4   Foundation                          0x00007fff9b04faf1 +[NSUndoManager(NSPrivate) _endTopLevelGroupings] + 170
    5   AppKit                              0x00007fff9255febe -[NSApplication run] + 1000
    6   main                                0x0000000004453b8b uiMain + 43
    7   main                                0x000000000405da70 runtime.asmcgocall + 112
)
libc++abi.dylib: terminating with uncaught exception of type NSException
SIGABRT: abort
PC=0x7fff8ddeff06 m=4
signal arrived during cgo execution

[andlabs]

What's your code?

[paulocoutinhox]

I think the problem is with UI package:

go get github.com/andlabs/ui

ld: warning: object file (/Users/paulo/Developer/workspaces/go/src/github.com/andlabs/ui/libui_darwin_amd64.a(libui-combined.o)) was built for newer OSX version (10.11) than being linked (10.8)

[andlabs]

That's an unrelated problem with a linking error in libui that will be fixed in the next stable-ish release. If that fix does fix this, then there are things about OS X that I do not understand...

[andlabs]

Merged with #280.

andlabs/libui#308 will fix the built for newer SDK version issue.