[New-bugs-announce] [issue44828] Using tkinter.filedialog crashes on macOS Python 3.9.6

[Nythepegasus]

New submission from Nythepegasus <nythepegasus84 at gmail.com>:

Using tkinter.filedialog crashes on macOS 12.0 Beta (21A5294g) on M1 when the open file dialog window is created. Full crash below:

2021-08-04 07:19:04.239 Python[40251:323363] *** Assertion failure in -[NSOpenPanel beginServicePanel:asyncExHandler:], NSVBOpenAndSavePanels.m:1910
2021-08-04 07:19:04.241 Python[40251:323363] -[NSSavePanel beginWithCompletionHandler:]_block_invoke caught non-fatal NSInternalInconsistencyException '<NSOpenPanel: 0x1206062d0> is attempting to advance this Open/Save panel to run phase while another self.advanceToRunPhaseCompletionHandler is in waiting for a previous attempt. An Open/Save panel cannot start to advance more than once.' with user dictionary {
    NSAssertFile = "NSVBOpenAndSavePanels.m";
    NSAssertLine = 1910;
} and backtrace (
	0   CoreFoundation                      0x00000001a9d47150 __exceptionPreprocess + 240
	1   libobjc.A.dylib                     0x00000001a9a986e8 objc_exception_throw + 60
	2   Foundation                          0x00000001aac3b4a4 -[NSCalendarDate initWithCoder:] + 0
	3   AppKit                              0x00000001ad1f02b0 -[NSSavePanel beginServicePanel:asyncExHandler:] + 512
	4   AppKit                              0x00000001ad1f1708 -[NSSavePanel runModal] + 332
	5   libtk8.6.dylib                      0x00000001013d8c18 showOpenSavePanel + 360
	6   libtk8.6.dylib                      0x00000001013d99e4 Tk_ChooseDirectoryObjCmd + 992
	7   libtcl8.6.dylib                     0x00000001011cbafc TclNRRunCallbacks + 80
	8   _tkinter.cpython-39-darwin.so       0x0000000100c111a4 Tkapp_Call + 400
	9   Python                              0x0000000100d66a40 cfunction_call + 96
	10  Python                              0x0000000100d184e0 _PyObject_Call + 128
	11  Python                              0x0000000100e10150 _PyEval_EvalFrameDefault + 40288
	12  Python                              0x0000000100e053f0 _PyEval_EvalCode + 444
	13  Python                              0x0000000100d1877c _PyFunction_Vectorcall + 364
	14  Python                              0x0000000100e12590 call_function + 128
	15  Python                              0x0000000100e0ff08 _PyEval_EvalFrameDefault + 39704
	16  Python                              0x0000000100e053f0 _PyEval_EvalCode + 444
	17  Python                              0x0000000100d1877c _PyFunction_Vectorcall + 364
	18  Python                              0x0000000100e12590 call_function + 128
	19  Python                              0x0000000100e0ff84 _PyEval_EvalFrameDefault + 39828
	20  Python                              0x0000000100e053f0 _PyEval_EvalCode + 444
	21  Python                              0x0000000100e5cce4 run_eval_code_obj + 136
	22  Python                              0x0000000100e5cbf8 run_mod + 112
	23  Python                              0x0000000100e5a434 pyrun_file + 168
	24  Python                              0x0000000100e59d58 pyrun_simple_file + 276
	25  Python                              0x0000000100e59c04 PyRun_SimpleFileExFlags + 80
	26  Python                              0x0000000100e79d2c pymain_run_file + 320
	27  Python                              0x0000000100e7947c Py_RunMain + 916
	28  Python                              0x0000000100e7a6c4 pymain_main + 36
	29  Python                              0x0000000100e7a93c Py_BytesMain + 40
	30  dyld                                0x00000001007990fc start + 520
)
.

----------
components: Tkinter
files: tkinter_crash.py
messages: 398889
nosy: Nythepegasus
priority: normal
severity: normal
status: open
title: Using tkinter.filedialog crashes on macOS Python 3.9.6
type: crash
versions: Python 3.9
Added file: https://bugs.python.org/file50200/tkinter_crash.py

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue44828>
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