Mac: crash in ui_element_get_metadata on AXDisclosureTriangle

[nriley]

Same setup as in #434. This also affects AXSlider and AXHeading.

from talon import Module, actions, ui
from pprint import pprint as pp

mod = Module()

@mod.action_class
class Actions:
    def test():
        """test"""
        s = ui.apps(bundle='com.apple.controlcenter')[0]
        dm = s.children.find_one(AXRole='AXMenuBarItem', AXIdentifier='com.apple.menuextra.display')
        dm.perform('AXPress')
        actions.sleep(0.1)
        cc = s.children.find_one(AXRole='AXWindow', AXTitle='Control Center')
        dt = cc.children.find_one(AXRole='AXDisclosureTriangle')
        pp(dt)
        pp(dt.attrs) # crashes
        dm.perform('AXPress')

Process:               Talon [15456]
Path:                  /Users/USER/*/Talon.app/Contents/MacOS/Talon
Identifier:            com.talonvoice.Talon
Version:               0.2.0-196-gecaa (109.196)
Code Type:             ARM-64 (Native)
Parent Process:        launchd [1]
User ID:               501

Date/Time:             2021-11-27 13:52:10.5962 -0500
OS Version:            macOS 12.0.1 (21A559)
Report Version:        12
Anonymous UUID:        25EBA5EF-2C5F-63DD-2DE4-E002C97765E5

Sleep/Wake UUID:       87ACA2AF-297B-4DF7-B638-3D4FF793E958

Time Awake Since Boot: 46000 seconds
Time Since Wake:       27576 seconds

System Integrity Protection: enabled

Crashed Thread:        26

Exception Type:        EXC_CRASH (SIGABRT)
Exception Codes:       0x0000000000000000, 0x0000000000000000
Exception Note:        EXC_CORPSE_NOTIFY

Application Specific Information:
*** Terminating app due to uncaught exception 'NSInvalidUnarchiveOperationException', reason: 'This decoder will only decode classes that adopt NSSecureCoding. Class '__NSCFType' does not adopt it.'
abort() called
terminating with uncaught exception of type NSException

Application Specific Backtrace 0:
0   CoreFoundation                      0x00000001939c012c __exceptionPreprocess + 240
1   libobjc.A.dylib                     0x0000000193711808 objc_exception_throw + 60
2   Foundation                          0x0000000194916e0c -[NSCoder __failWithException:] + 180
3   Foundation                          0x00000001948b0d74 -[NSCoder(Exceptions) __failWithExceptionName:errorCode:format:] + 260
4   Foundation                          0x00000001947c5e80 -[NSCoder validateClassSupportsSecureCoding:] + 328
5   Foundation                          0x00000001948020a4 _encodeObject + 420
6   Foundation                          0x00000001948030cc -[NSKeyedArchiver _encodeArrayOfObjects:forKey:] + 380
7   Foundation                          0x0000000194803510 -[NSDictionary(NSDictionary) encodeWithCoder:] + 700
8   Foundation                          0x00000001948023c8 _encodeObject + 1224
9   Foundation                          0x00000001948c41b4 -[NSAttributedString encodeWithCoder:] + 272
10  Talon                               0x0000000102729ad4 ui_element_get_metadata + 3016
11  Talon                               0x0000000102729008 ui_element_get_metadata + 252
12  libffi.dylib                        0x00000001a1934050 ffi_call_SYSV + 80
13  libffi.dylib                        0x00000001a193c9e4 ffi_call_int + 948
14  _cffi_backend.cpython-39-darwin.so  0x000000010a6dcddc PyInit__cffi_backend + 30908
15  libpython3.9.dylib                  0x00000001030d4090 _PyObject_MakeTpCall + 360
16  libpython3.9.dylib                  0x00000001031a7c04 _PyEval_EvalFrameDefault + 33284
17  libpython3.9.dylib                  0x00000001031a551c _PyEval_EvalFrameDefault + 23324
18  libpython3.9.dylib                  0x00000001030d4888 _PyFunction_Vectorcall + 380
19  libpython3.9.dylib                  0x00000001030d6810 PyMethod_New + 352
20  libpython3.9.dylib                  0x00000001031a7ba4 _PyEval_EvalFrameDefault + 33188
21  libpython3.9.dylib                  0x00000001031a551c _PyEval_EvalFrameDefault + 23324
22  libpython3.9.dylib                  0x00000001030d4888 _PyFunction_Vectorcall + 380
23  libpython3.9.dylib                  0x00000001030ddca0 PyWrapper_New + 1208
24  libpython3.9.dylib                  0x000000010311a828 _PyObject_GenericGetAttrWithDict + 196
25  libpython3.9.dylib                  0x0000000103134d8c _PyType_Lookup + 32920
26  libpython3.9.dylib                  0x00000001031a3be4 _PyEval_EvalFrameDefault + 16868
27  libpython3.9.dylib                  0x00000001030d4888 _PyFunction_Vectorcall + 380
28  libpython3.9.dylib                  0x00000001031a5814 _PyEval_EvalFrameDefault + 24084
29  libpython3.9.dylib                  0x00000001031a8af4 _PyEval_EvalFrameDefault + 37108
30  libpython3.9.dylib                  0x00000001030d480c _PyFunction_Vectorcall + 256
31  libpython3.9.dylib                  0x00000001030d6884 PyMethod_New + 468
32  libpython3.9.dylib                  0x00000001031a5814 _PyEval_EvalFrameDefault + 24084
33  libpython3.9.dylib                  0x00000001031a8af4 _PyEval_EvalFrameDefault + 37108
34  libpython3.9.dylib                  0x00000001030d480c _PyFunction_Vectorcall + 256
35  libpython3.9.dylib                  0x00000001030d3eb8 _PyObject_FastCallDictTstate + 272
36  libpython3.9.dylib                  0x00000001030d4b90 _PyObject_Call_Prepend + 148
37  libpython3.9.dylib                  0x0000000103134a4c _PyType_Lookup + 32088
38  libpython3.9.dylib                  0x00000001030d4090 _PyObject_MakeTpCall + 360
39  libpython3.9.dylib                  0x00000001031a7c04 _PyEval_EvalFrameDefault + 33284
40  libpython3.9.dylib                  0x00000001031a551c _PyEval_EvalFrameDefault + 23324
41  libpython3.9.dylib                  0x00000001031a8af4 _PyEval_EvalFrameDefault + 37108
42  libpython3.9.dylib                  0x000000010319f938 PyEval_EvalCode + 80
43  libpython3.9.dylib                  0x000000010319c790 _PyAST_Optimize + 25628
44  libpython3.9.dylib                  0x0000000103115714 PyCMethod_New + 744
45  libpython3.9.dylib                  0x00000001031a7ba4 _PyEval_EvalFrameDefault + 33188
46  libpython3.9.dylib                  0x00000001031a5598 _PyEval_EvalFrameDefault + 23448
47  libpython3.9.dylib                  0x00000001030d4888 _PyFunction_Vectorcall + 380
48  libpython3.9.dylib                  0x00000001031a7ba4 _PyEval_EvalFrameDefault + 33188
49  libpython3.9.dylib                  0x00000001031a54f8 _PyEval_EvalFrameDefault + 23288
50  libpython3.9.dylib                  0x00000001031a8af4 _PyEval_EvalFrameDefault + 37108
51  libpython3.9.dylib                  0x00000001030d480c _PyFunction_Vectorcall + 256
52  libpython3.9.dylib                  0x00000001031a7ba4 _PyEval_EvalFrameDefault + 33188
53  libpython3.9.dylib                  0x00000001031a54f8 _PyEval_EvalFrameDefault + 23288
54  libpython3.9.dylib                  0x00000001030d4888 _PyFunction_Vectorcall + 380
55  libpython3.9.dylib                  0x00000001031a7ba4 _PyEval_EvalFrameDefault + 33188
56  libpython3.9.dylib                  0x00000001031a54f8 _PyEval_EvalFrameDefault + 23288
57  libpython3.9.dylib                  0x00000001030d4888 _PyFunction_Vectorcall + 380
58  libpython3.9.dylib                  0x00000001031a7ba4 _PyEval_EvalFrameDefault + 33188
59  libpython3.9.dylib                  0x00000001031a54f8 _PyEval_EvalFrameDefault + 23288
60  libpython3.9.dylib                  0x00000001030d4888 _PyFunction_Vectorcall + 380
61  libpython3.9.dylib                  0x00000001031a7ba4 _PyEval_EvalFrameDefault + 33188
62  libpython3.9.dylib                  0x00000001031a54f8 _PyEval_EvalFrameDefault + 23288
63  libpython3.9.dylib                  0x00000001030d4888 _PyFunction_Vectorcall + 380
64  libpython3.9.dylib                  0x00000001030d3eb8 _PyObject_FastCallDictTstate + 272
65  libpython3.9.dylib                  0x00000001030d4b90 _PyObject_Call_Prepend + 148
66  libpython3.9.dylib                  0x00000001031364e0 _PyType_Lookup + 38892
67  libpython3.9.dylib                  0x000000010312d584 _PyType_Lookup + 2192
68  libpython3.9.dylib                  0x00000001030d4090 _PyObject_MakeTpCall + 360
69  libpython3.9.dylib                  0x00000001031a7c04 _PyEval_EvalFrameDefault + 33284
70  libpython3.9.dylib                  0x00000001031a551c _PyEval_EvalFrameDefault + 23324
71  libpython3.9.dylib                  0x00000001030d4888 _PyFunction_Vectorcall + 380
72  libpython3.9.dylib                  0x00000001031a7ba4 _PyEval_EvalFrameDefault + 33188
73  libpython3.9.dylib                  0x00000001031a54f8 _PyEval_EvalFrameDefault + 23288
74  libpython3.9.dylib                  0x00000001030d4888 _PyFunction_Vectorcall + 380
75  libpython3.9.dylib                  0x00000001030d68f4 PyMethod_New + 580
76  libpython3.9.dylib                  0x00000001031a5814 _PyEval_EvalFrameDefault + 24084
77  libpython3.9.dylib                  0x00000001030d4888 _PyFunction_Vectorcall + 380
78  libpython3.9.dylib                  0x00000001031a7ba4 _PyEval_EvalFrameDefault + 33188
79  libpython3.9.dylib                  0x00000001031a54f8 _PyEval_EvalFrameDefault + 23288
80  libpython3.9.dylib                  0x00000001030d4888 _PyFunction_Vectorcall + 380
81  libpython3.9.dylib                  0x00000001031a7ba4 _PyEval_EvalFrameDefault + 33188
82  libpython3.9.dylib                  0x00000001031a54f8 _PyEval_EvalFrameDefault + 23288
83  libpython3.9.dylib                  0x00000001030d4888 _PyFunction_Vectorcall + 380
84  libpython3.9.dylib                  0x00000001030d6884 PyMethod_New + 468
85  libpython3.9.dylib                  0x0000000103241a50 PyInit__thread + 6468
86  libpython3.9.dylib                  0x00000001031f2de0 PyThread_start_new_thread + 320
87  libsystem_pthread.dylib             0x00000001938754ec _pthread_start + 148
88  libsystem_pthread.dylib             0x00000001938702d0 thread_start + 8

[lunixbochs]

We're crashing on this:

AXAttributedDescription Forward{
    AXATextAlignmentValue = 0;
    AXFont =     {
        AXFontFamily = ".AppleSystemUIFont";
        AXFontName = ".SFNS-Regular";
        AXFontSize = 13;
        AXVisibleName = "System Font Regular";
    };
    AXForegroundColor = "<CGColor 0x600002340180> [<CGColorSpace 0x6000023055c0> (kCGColorSpaceICCBased; kCGColorSpaceModelRGB; Generic RGB Profile)] ( 1 1 1 0.898039 )";
    AXLanguage = "en-US";
}

My guess is that the CGColor in AXForegroundColor is the issue. NSAttributedString is very annoying to serialize manually, so I was using NSPropertyListXMLFormat_v1_0 with a [[NSKeyedArchiver alloc] initRequiringSecureCoding:YES]. I'll allow that to fail more gracefully.

[lunixbochs]

fixed in beta 0.2.0-201

[nriley]

Works, thanks!