Since the beta releases of iPadOS 26 we have been having some crashes about
Invalid parameter not satisfying: parentEnvironment != nil
We got to contact a couple of users and we found out that the crash appears when entering a screen in a UINavigationController with the iPad device connected to a Magic Keyboard. If the device is not connected to the keyboard then nothing happens and everything works ok.
From our end we haven't managed to reproduce the crash so I am pasting part of the stacktrace if it can be of any help.
3 UIKitCore 0x19dfd2e14 -[_UIFocusContainerGuideFallbackItemsContainer initWithParentEnvironment:childItems:] + 224 (_UIFocusContainerGuideFallbackItemsContainer.m:23)
4 UIKitCore 0x19dae3108 -[_UIFocusContainerGuideImpl _searchForFocusRegionsInContext:] + 368 (_UIFocusGuideImpl.m:246)
5 UIKitCore 0x19db28498 -[_UIFocusMapSnapshot addRegionsInContainer:] + 2720 (_UIFocusMapSnapshot.m:531)
6 UIKitCore 0x19db28900 -[_UIFocusMapSnapshot addRegionsInContainers:] + 160 (_UIFocusMapSnapshot.m:545)
7 UIKitCore 0x19d1313dc _UIFocusRegionSearchContextSearchForFocusRegionsInEnvironment + 632 (_UIFocusRegion.m:143)
8 UIKitCore 0x19db1d244 -[_UIFocusRegionContainerProxy _searchForFocusRegionsInContext:] + 140 (_UIFocusRegionContainerProxy.m:184)
9 UIKitCore 0x19db28498 -[_UIFocusMapSnapshot addRegionsInContainer:] + 2720 (_UIFocusMapSnapshot.m:531)
10 UIKitCore 0x19d1320fc _UIFocusItemContainerAddChildItemsInContextWithOptions + 596 (UIFocusItemContainer.m:183)
11 UIKitCore 0x19d131b98 _UIFocusRegionSearchContextAddChildItemsInEnvironmentContainer + 648 (_UIFocusRegion.m:108)
12 UIKitCore 0x19d131398 _UIFocusRegionSearchContextSearchForFocusRegionsInEnvironment + 564 (_UIFocusRegion.m:140)
13 UIKitCore 0x19db1d244 -[_UIFocusRegionContainerProxy _searchForFocusRegionsInContext:] + 140 (_UIFocusRegionContainerProxy.m:184)
14 UIKitCore 0x19db28498 -[_UIFocusMapSnapshot addRegionsInContainer:] + 2720 (_UIFocusMapSnapshot.m:531)
15 UIKitCore 0x19d1320fc _UIFocusItemContainerAddChildItemsInContextWithOptions + 596 (UIFocusItemContainer.m:183)
16 UIKitCore 0x19d131b98 _UIFocusRegionSearchContextAddChildItemsInEnvironmentContainer + 648 (_UIFocusRegion.m:108)
17 UIKitCore 0x19d131398 _UIFocusRegionSearchContextSearchForFocusRegionsInEnvironment + 564 (_UIFocusRegion.m:140)
18 UIKitCore 0x19db1d244 -[_UIFocusRegionContainerProxy _searchForFocusRegionsInContext:] + 140 (_UIFocusRegionContainerProxy.m:184)
19 UIKitCore 0x19db28498 -[_UIFocusMapSnapshot addRegionsInContainer:] + 2720 (_UIFocusMapSnapshot.m:531)
20 UIKitCore 0x19d1320fc _UIFocusItemContainerAddChildItemsInContextWithOptions + 596 (UIFocusItemContainer.m:183)
21 UIKitCore 0x19d131b98 _UIFocusRegionSearchContextAddChildItemsInEnvironmentContainer + 648 (_UIFocusRegion.m:108)
22 UIKitCore 0x19d131398 _UIFocusRegionSearchContextSearchForFocusRegionsInEnvironment + 564 (_UIFocusRegion.m:140)
23 UIKitCore 0x19db1d244 -[_UIFocusRegionContainerProxy _searchForFocusRegionsInContext:] + 140 (_UIFocusRegionContainerProxy.m:184)
24 UIKitCore 0x19db28498 -[_UIFocusMapSnapshot addRegionsInContainer:] + 2720 (_UIFocusMapSnapshot.m:531)
25 UIKitCore 0x19d1320fc _UIFocusItemContainerAddChildItemsInContextWithOptions + 596 (UIFocusItemContainer.m:183)
26 UIKitCore 0x19d131b98 _UIFocusRegionSearchContextAddChildItemsInEnvironmentContainer + 648 (_UIFocusRegion.m:108)
27 UIKitCore 0x19d131398 _UIFocusRegionSearchContextSearchForFocusRegionsInEnvironment + 564 (_UIFocusRegion.m:140)
28 UIKitCore 0x19db1d244 -[_UIFocusRegionContainerProxy _searchForFocusRegionsInContext:] + 140 (_UIFocusRegionContainerProxy.m:184)
29 UIKitCore 0x19db28498 -[_UIFocusMapSnapshot addRegionsInContainer:] + 2720 (_UIFocusMapSnapshot.m:531)
30 UIKitCore 0x19d1320fc _UIFocusItemContainerAddChildItemsInContextWithOptions + 596 (UIFocusItemContainer.m:183)
31 UIKitCore 0x19d131b98 _UIFocusRegionSearchContextAddChildItemsInEnvironmentContainer + 648 (_UIFocusRegion.m:108)
32 UIKitCore 0x19d131398 _UIFocusRegionSearchContextSearchForFocusRegionsInEnvironment + 564 (_UIFocusRegion.m:140)
33 UIKitCore 0x19db1d244 -[_UIFocusRegionContainerProxy _searchForFocusRegionsInContext:] + 140 (_UIFocusRegionContainerProxy.m:184)
34 UIKitCore 0x19db28498 -[_UIFocusMapSnapshot addRegionsInContainer:] + 2720 (_UIFocusMapSnapshot.m:531)
35 UIKitCore 0x19d1320fc _UIFocusItemContainerAddChildItemsInContextWithOptions + 596 (UIFocusItemContainer.m:183)
36 UIKitCore 0x19d131b98 _UIFocusRegionSearchContextAddChildItemsInEnvironmentContainer + 648 (_UIFocusRegion.m:108)
37 UIKitCore 0x19d131398 _UIFocusRegionSearchContextSearchForFocusRegionsInEnvironment + 564 (_UIFocusRegion.m:140)
38 UIKitCore 0x19db1d244 -[_UIFocusRegionContainerProxy _searchForFocusRegionsInContext:] + 140 (_UIFocusRegionContainerProxy.m:184)
39 UIKitCore 0x19db28498 -[_UIFocusMapSnapshot addRegionsInContainer:] + 2720 (_UIFocusMapSnapshot.m:531)
40 UIKitCore 0x19d132e08 -[_UIFocusMapSnapshot _capture] + 424 (_UIFocusMapSnapshot.m:403)
41 UIKitCore 0x19db2675c -[_UIFocusMapSnapshot _initWithSnapshotter:mapArea:searchArea:] + 476 (_UIFocusMapSnapshot.m:171)
42 UIKitCore 0x19d130dcc -[_UIFocusMapSnapshotter captureSnapshot] + 192 (_UIFocusMapSnapshotter.m:137)
43 UIKitCore 0x19db2045c -[_UIFocusMap _inferredDefaultFocusItemInEnvironment:] + 136 (_UIFocusMap.m:168)
44 UIKitCore 0x19daffd2c -[_UIFocusEnvironmentPreferenceEnumerationContext _inferPreferencesForEnvironment:] + 140 (_UIFocusEnvironmentPreferenceEnumerator.m:313)
45 UIKitCore 0x19d127ab4 -[_UIFocusEnvironmentPreferenceEnumerationContext _resolvePreferredFocusEnvironments] + 104 (_UIFocusEnvironmentPreferenceEnumerator.m:250)
46 UIKitCore 0x19d127394 -[_UIFocusEnvironmentPreferenceEnumerationContext preferredEnvironments] + 36 (_UIFocusEnvironmentPreferenceEnumerator.m:184)
47 UIKitCore 0x19d126e94 _enumeratePreferredFocusEnvironments + 400 (_UIFocusEnvironmentPreferenceEnumerator.m:503)
Thanks for the crash report.
I was able to uncover an internal bug that AFAICT is tracking the same issue (r. 154431813) [1]. Sadly, that remains unfixed and doesn’t offer any ideas as to how you might avoid it.
My advice is that you file your own bug about this, attaching all the information you have available. Please post your bug number, just for the record.
Also, you mentioned that you’re in touch with some users that can reproduce this. If so, could you ask them to file their own report about it in Feedback Assistant. That should capture a sysdiagnose log, which might help with the investigation.
If that happens, ask them to send you their bug number and then post those here as well.
Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"
[1] Much to my own surprise. Radar is a very big haystack (-:
