macOS Tk failing from release 20220222 onwards.

Hey @indygreg,

It’s me again, exploring your wonderful project, and experiencing a tkinter failure on macOS.

My minimal test:

import tkinter
root = tkinter.Tk()

Works up to 20220222. On that release, with 3.10.2, fails with:

Python 3.10.2 (main, Feb 20 2022, 20:00:41) [Clang 13.0.1 ] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import tkinter
>>> root = tkinter.Tk()
2022-06-21 21:28:57.868 PuPPY[81171:2337557] -[TKApplication tkProcessEvent:]: unrecognized selector sent to instance 0x7f958b774200
2022-06-21 21:28:57.871 PuPPY[81171:2337557] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[TKApplication tkProcessEvent:]: unrecognized selector sent to instance 0x7f958b774200'
*** First throw call stack:
(
	0   CoreFoundation                      0x00007fff2d05e035 __exceptionPreprocess + 256
	1   libobjc.A.dylib                     0x00007fff578c6a17 objc_exception_throw + 48
	2   CoreFoundation                      0x00007fff2d0d7fce -[NSObject(NSObject) __retain_OA] + 0
	3   CoreFoundation                      0x00007fff2cfffe9f ___forwarding___ + 1485
	4   CoreFoundation                      0x00007fff2cfff848 _CF_forwarding_prep_0 + 120
	5   libpython3.10.dylib                 0x000000010f6a9ca7 TkMacOSXEventsCheckProc + 351
	6   libpython3.10.dylib                 0x000000010f5ab4cf Tcl_DoOneEvent + 306
	7   libpython3.10.dylib                 0x000000010f6a1ede TkpInit + 389
	8   libpython3.10.dylib                 0x000000010f62130c Initialize + 2046
	9   libpython3.10.dylib                 0x000000010f97471c Tkapp_New + 924
	10  libpython3.10.dylib                 0x000000010f9740a0 _tkinter_create + 640
	11  libpython3.10.dylib                 0x000000010f76ce3b cfunction_vectorcall_FASTCALL + 171
	12  libpython3.10.dylib                 0x000000010f81e123 call_function + 419
	13  libpython3.10.dylib                 0x000000010f819f7f _PyEval_EvalFrameDefault + 28159
	14  libpython3.10.dylib                 0x000000010f8129fa _PyEval_Vector + 2362
	15  libpython3.10.dylib                 0x000000010f71ac06 _PyObject_FastCallDictTstate + 262
	16  libpython3.10.dylib                 0x000000010f71b6c8 _PyObject_Call_Prepend + 152
	17  libpython3.10.dylib                 0x000000010f79084f slot_tp_init + 207
	18  libpython3.10.dylib                 0x000000010f788ed4 type_call + 324
	19  libpython3.10.dylib                 0x000000010f71a86d _PyObject_MakeTpCall + 253
	20  libpython3.10.dylib                 0x000000010f81e241 call_function + 705
	21  libpython3.10.dylib                 0x000000010f819f7f _PyEval_EvalFrameDefault + 28159
	22  libpython3.10.dylib                 0x000000010f8129fa _PyEval_Vector + 2362
	23  libpython3.10.dylib                 0x000000010f87267b PyRun_InteractiveOneObjectEx + 1227
	24  libpython3.10.dylib                 0x000000010f8714eb _PyRun_InteractiveLoopObject + 427
	25  libpython3.10.dylib                 0x000000010f870ae7 _PyRun_AnyFileObject + 103
	26  libpython3.10.dylib                 0x000000010f8743c8 PyRun_AnyFileExFlags + 168
	27  libpython3.10.dylib                 0x000000010f896114 Py_RunMain + 2788
	28  libpython3.10.dylib                 0x000000010f8973a1 pymain_main + 1681
	29  libpython3.10.dylib                 0x000000010f8977eb Py_BytesMain + 43
	30  libdyld.dylib                       0x00007fff590963d5 start + 1
	31  ???                                 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
Abort trap: 6

What else I tested:

• Failing – macOS 10.14.6:

  • 3.10 pgo, lto, pgo+lto, and debug builds.
  • 3.9 pgo and lto builds.
  • 3.10 pgo build of the most recent release, 20220528.

• Working – CentOS 7 Linux and Windows, both x86-64:

  • 3.10 build of most recent release.

Release notes for 20220222 indicate that Tcl/Tk was upgraded from 8.6.10 to 8.6.12, so this provides at least some explanation to my observations.

Can you please help in getting Tk back in shape on macOS? How can I assist in the process?

Again, thanks a lot for sharing the project and, in advance, for helping address this.

[indygreg]

https://core.tcl-lang.org/tk/tktview/85f316beb15108ac43b03fa6c8608e31f3ae5f92 seems interesting.

[tmontes]

@indygreg,

Wow, thank you very much for such a speedy fix. I do confirm that Tk based applications work nicely on macOS (and Windows and Linux) now!

Amazing! 😃