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[No QA] Soft-fail Fabric removeViewAt from a non-ViewGroup parent (APP-H7A) - #103447

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mountiny merged 2 commits into
Expensify:mainfrom
software-mansion-labs:collectioneur/rn-patch-fixe-crash
Oct 8, 2026
Merged

mountiny merged 2 commits into
Expensify:mainfrom
software-mansion-labs:collectioneur/rn-patch-fixe-crash

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@collectioneur

@collectioneur collectioneur commented Oct 8, 2026 •

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Explanation of Change

Sentry APP-H7A is a fatal Android Fabric crash: IllegalStateException: Unable to remove a view from a view that is not a ViewGroup, thrown from SurfaceMountingManager.removeViewAt. It is the Remove counterpart of APP-K0G, which #102901 fixed for addViewAt with patch +045. That patch does not touch removeViewAt, so APP-H7A still crashes.

This PR adds one React Native patch:

+047 – soft-fail removeViewAt when the parent is not a ViewGroup. RN 0.86.0 throws when the parent tag has a ViewState whose view is null or not a ViewGroup. The sources are the same as for APP-K0G: a placeholder ViewState with no view, which updateEventEmitter creates (react-native#58526), delayed deletes during touches, and differ flatten/unflatten bugs. IntBufferBatchMountItem is not retryable, so the throw crashes the app. A view that is not a ViewGroup cannot hold children, so the removal is a no-op. The patch logs a ReactNoCrashSoftException (including the parent view class) and returns.

This is a backport of upstream 3f553d7 (react-native#57860), with two differences:

  • Upstream calls checkNotNull(parentView) before this check, so a null parentView still crashes there. 0.86.0 has no checkNotNull, so a null parent goes into the same branch and the patch also covers it. The placeholder ViewState has a null view, so this is the case we most need.
  • The log message keeps 0.86.0's wording and adds ParentView, the same way +045 does.

What happens next: if the child is still attached to a stale native parent, the next addViewAt of that child already detaches it in the existing "View already has a parent" branch. So skipping the remove does not cause a crash later.

Note: App does not register a ReactSoftExceptionLogger listener, so the new soft exception goes to logcat. A drop in APP-H7A events on the release that includes this PR is the signal that it worked.

Fixed Issues

$ #103369
PROPOSAL: N/A

Tests

There are no reliable steps to reproduce APP-H7A. The crash comes from a native mount race, not from a specific screen.

  • Verify that no errors appear in the JS console

Offline tests

N/A

QA Steps

No QA

  • Verify that no errors appear in the JS console

PR Author Checklist

  • I linked the correct issue in the ### Fixed Issues section above
  • I wrote clear testing steps that cover the changes made in this PR
    • I added steps for local testing in the Tests section
    • I added steps for the expected offline behavior in the Offline steps section
    • I added steps for Staging and/or Production testing in the QA steps section
    • I added steps to cover failure scenarios (i.e. verify an input displays the correct error message if the entered data is not correct)
    • I turned off my network connection and tested it while offline to ensure it matches the expected behavior (i.e. verify the default avatar icon is displayed if app is offline)
    • I tested this PR with a High Traffic account against the staging or production API to ensure there are no regressions (e.g. long loading states that impact usability).
  • I included screenshots or videos for tests on all platforms
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    • Android: Native
    • Android: mWeb Chrome
    • iOS: Native
    • iOS: mWeb Safari
    • MacOS: Chrome / Safari
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  • If the PR modifies a generic component, I tested and verified that those changes do not break usages of that component in the rest of the App (i.e. if a shared library or component like Avatar is modified, I verified that Avatar is working as expected in all cases)
  • If the PR modifies a component related to any of the existing Storybook stories, I tested and verified all stories for that component are still working as expected.
  • If the PR modifies a component or page that can be accessed by a direct deeplink, I verified that the code functions as expected when the deeplink is used - from a logged in and logged out account.
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    • I verified state changes are announced (e.g. checked/unchecked, expanded/collapsed, selected).
  • I added unit tests for any new feature or bug fix in this PR to help automatically prevent regressions in this user flow.
  • If the main branch was merged into this PR after a review, I tested again and verified the outcome was still expected according to the Test steps.

Screenshots/Videos

Android: Native
Android: mWeb Chrome
iOS: Native
iOS: mWeb Safari
MacOS: Chrome / Safari

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⚠️ This PR is possibly changing native code and/or updating libraries, it may cause problems with HybridApp. Please check if any patch updates are required in the HybridApp repo and run an AdHoc build to verify that HybridApp will not break. Ask Contributor Plus for help if you are not sure how to handle this. ⚠️

@collectioneur collectioneur changed the title add patch that replaces crash with soft exception Soft-fail Fabric removeViewAt from a non-ViewGroup parent (APP-H7A) Oct 8, 2026
@collectioneur collectioneur changed the title Soft-fail Fabric removeViewAt from a non-ViewGroup parent (APP-H7A) [No QA] Soft-fail Fabric removeViewAt from a non-ViewGroup parent (APP-H7A) Oct 8, 2026
@collectioneur
collectioneur marked this pull request as ready for review October 8, 2026 11:54
@collectioneur
collectioneur requested a review from a team as a code owner October 8, 2026 11:54
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Codex usage limits have been reached for code reviews. Please check with the admins of this repo to increase the limits by adding credits.
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melvin-bot Bot requested review from parasharrajat and removed request for a team October 8, 2026 11:54
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@parasharrajat Please copy/paste the Reviewer Checklist from here into a new comment on this PR and complete it. If you have the K2 extension, you can simply click: [this button]

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🚧 mountiny has triggered a test Expensify/App build. You can view the workflow run here.

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mountiny removed the request for review from parasharrajat October 8, 2026 12:16
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Reviewer Checklist

  • I have verified the author checklist is complete (all boxes are checked off).
  • I verified the correct issue is linked in the ### Fixed Issues section above
  • I verified testing steps are clear and they cover the changes made in this PR
    • I verified the steps for local testing are in the Tests section
    • I verified the steps for Staging and/or Production testing are in the QA steps section
    • I verified the steps cover any possible failure scenarios (i.e. verify an input displays the correct error message if the entered data is not correct)
    • I turned off my network connection and tested it while offline to ensure it matches the expected behavior (i.e. verify the default avatar icon is displayed if app is offline)
  • I checked that screenshots or videos are included for tests on all platforms
  • I included screenshots or videos for tests on all platforms
  • I verified that the composer does not automatically focus or open the keyboard on mobile unless explicitly intended. This includes checking that returning the app from the background does not unexpectedly open the keyboard.
  • I verified tests pass on all platforms & I tested again on:
    • Android: HybridApp
    • Android: mWeb Chrome
    • iOS: HybridApp
    • iOS: mWeb Safari
    • MacOS: Chrome / Safari
  • If there are any errors in the console that are unrelated to this PR, I either fixed them (preferred) or linked to where I reported them in Slack
  • I verified proper code patterns were followed (see Reviewing the code)
    • I verified that comments were added to code that is not self explanatory
    • I verified that any new or modified comments were clear, correct English, and explained "why" the code was doing something instead of only explaining "what" the code was doing.
    • I verified any copy / text that was added to the app is grammatically correct in English. It adheres to proper capitalization guidelines (note: only the first word of header/labels should be capitalized), and is either coming verbatim from figma or has been approved by marketing (in order to get marketing approval, ask the Bug Zero team member to add the Waiting for copy label to the issue)
  • If a new code pattern is added I verified it was agreed to be used by multiple Expensify engineers
  • I verified that this PR follows the guidelines as stated in the Review Guidelines
  • I verified other components that can be impacted by these changes have been tested, and I retested again (i.e. if the PR modifies a shared library or component like Avatar, I verified the components using Avatar have been tested & I retested again)
  • If a new component is created I verified that:
    • A similar component doesn't exist in the codebase
    • All props are defined accurately
    • The component has a clear name that is non-ambiguous and the purpose of the component can be inferred from the name alone
    • The only data being stored in the state is data necessary for rendering and nothing else
    • The component has the minimum amount of code necessary for its purpose, and it is broken down into smaller components in order to separate concerns and functions
  • If a new CSS style is added I verified that:
    • A similar style doesn't already exist
    • The style can't be created with an existing StyleUtils function (i.e. StyleUtils.getBackgroundAndBorderStyle(theme.componentBG)
  • If the PR modifies code that runs when editing or sending messages, I tested and verified there is no unexpected behavior for all supported markdown - URLs, single line code, code blocks, quotes, headings, bold, strikethrough, and italic.
  • If the PR modifies a generic component, I tested and verified that those changes do not break usages of that component in the rest of the App (i.e. if a shared library or component like Avatar is modified, I verified that Avatar is working as expected in all cases)
  • If the PR modifies a component related to any of the existing Storybook stories, I tested and verified all stories for that component are still working as expected.
  • If the PR modifies a component or page that can be accessed by a direct deeplink, I verified that the code functions as expected when the deeplink is used - from a logged in and logged out account.
  • If the PR modifies the UI (e.g. new buttons, new UI components, changing the padding/spacing/sizing, moving components, etc) or modifies the form input styles:
    • I verified that all the inputs inside a form are aligned with each other.
    • I added Design label and/or tagged @Expensify/design so the design team can review the changes.
  • If the PR adds or modifies the UI:
    • I asked an AI agent to review the changes for accessibility issues and addressed its findings.
    • I tested with a screen reader (VoiceOver on macOS) and verified all new/changed elements are reachable with a logical focus order.
    • I verified all new/changed elements have meaningful accessible names and roles.
    • I verified state changes are announced (e.g. checked/unchecked, expanded/collapsed, selected).
  • For any bug fix or new feature in this PR, I verified that sufficient unit tests are included to prevent regressions in this flow.
  • If the main branch was merged into this PR after a review, I tested again and verified the outcome was still expected according to the Test steps.
  • I have checked off every checkbox in the PR reviewer checklist, including those that don't apply to this PR.

Screenshots/Videos

Android: HybridApp
Android: mWeb Chrome
iOS: HybridApp
iOS: mWeb Safari
MacOS: Chrome / Safari

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Tested the ios app and worked well, thank you!

@mountiny
mountiny merged commit 81a6834 into Expensify:main Oct 8, 2026
30 of 34 checks passed
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🚧 mountiny has triggered a test Expensify/App build. You can view the workflow run here.

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OSBotify commented Oct 8, 2026

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✋ This PR was not deployed to staging yet because QA is ongoing. It will be automatically deployed to staging after the next production release.

@OSBotify OSBotify mentioned this pull request Oct 8, 2026
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OSBotify commented Oct 8, 2026

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🚀 Deployed to staging by https://github.com/mountiny in version: 9.5.6-0 🚀

platform result
🕸 web 🕸 success ✅
🤖 android 🤖 success ✅
🍎 iOS 🍎 success ✅

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OSBotify commented Oct 9, 2026

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🚀 Deployed to production by https://github.com/puneetlath in version: 9.5.6-6 🚀

platform result
🕸 web 🕸 success ✅
🤖 android 🤖 success ✅
🍎 iOS 🍎 success ✅

Bundle Size Analysis (Sentry):

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3 participants