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[ Widget Preview ] Running flutter pub get after adding a plugin dependency causes the previewer to crash #178317

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#178398
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[ Widget Preview ] Running flutter pub get after adding a plugin dependency causes the previewer to crash#178317
#178398
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bkonyi
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P1High-priority issues at the top of the work lista: widget previewsIssues related to the Widget Previewer toolingteam-toolOwned by Flutter Tool teamtriaged-toolTriaged by Flutter Tool team

Description

@bkonyi
bkonyi
opened on Nov 11, 2025

To reproduce:

  • Run flutter widget-preview start --web-server in a Flutter project directory
  • Add a plugin package dependency to the pubspec.yaml
  • Run flutter pub get

This will cause the flutter widget-preview process to repeatedly crash with an exception similar to the following:

Oops; flutter has exited unexpectedly: "Bad state: Unable to find the context to
/Users/bkonyi/samples/background_isolate_channels/linux/flutter/ephemeral/.plugin_symlinks/shared_preferences_linux/test/shared_preferences_linux_async_test.dart".

Stack trace:

#0      AnalysisContextCollectionImpl.contextFor (package:analyzer/src/dart/analysis/analysis_context_collection.dart:177:5)
#1      PreviewDetector._onFileSystemEvent.<anonymous closure> (package:flutter_tools/src/widget_preview/preview_detector.dart:147:50)
#2      PreviewDetectorMutex.runGuarded (package:flutter_tools/src/widget_preview/utils.dart:99:35)
<asynchronous suspension>
#3      PreviewDetector._onFileSystemEvent (package:flutter_tools/src/widget_preview/preview_detector.dart:118:5)
<asynchronous suspension>

Activity

  1. bkonyi
    self-assigned this
    on Nov 11, 2025
  2. bkonyi
    added
    P1High-priority issues at the top of the work list
    team-toolOwned by Flutter Tool team
    triaged-toolTriaged by Flutter Tool team
    a: widget previewsIssues related to the Widget Previewer tooling
    on Nov 11, 2025

  3. bkonyi commented on Nov 12, 2025

    @bkonyi
    bkonyi
    on Nov 12, 2025
    ContributorAuthor

    This issue can be worked around by executing flutter pub get after updating Flutter or adding / updating dependencies to a project and then restarting the widget previewer. For IDE users, this simply requires restarting the IDE.

  4. bkonyi
    added a commit that references this issue on Nov 12, 2025

    [ Widget Preview ] Ignore modifications to files in ephemeral directo…

    bdcc69f
  5. github-merge-queue
    added a commit that references this issue on Nov 13, 2025

    [ Widget Preview ] Ignore modifications to files in ephemeral directo…

    cfaaab8
  6. auto-submit
    closed this as completedin #178398on Nov 13, 2025
  7. flutteractionsbot
    added 2 commits that reference this issue on Nov 13, 2025

    [ Widget Preview ] Ignore modifications to files in ephemeral directo…

    c339b8f

    [ Widget Preview ] Ignore modifications to files in ephemeral directo…

    93306cc
  8. auto-submit
    added 2 commits that reference this issue on Nov 17, 2025

    [CP-stable][ Widget Preview ] Ignore modifications to files in epheme…

    7e4b2a4

    [CP-beta][ Widget Preview ] Ignore modifications to files in ephemera…

    f8c5a71
  9. IvoneDjaja
    added a commit that references this issue on Nov 22, 2025

    [ Widget Preview ] Ignore modifications to files in ephemeral directo…

    844144c

  10. github-actions commented on Nov 27, 2025

    @github-actions
    github-actionsbot
    on Nov 27, 2025 – with GitHub Actions

    This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.

  11. github-actions
    locked as resolved and limited conversation to collaborators on Nov 27, 2025
  12. mboetger
    added a commit that references this issue on Dec 2, 2025

    [ Widget Preview ] Ignore modifications to files in ephemeral directo…

    f78b942
  13. reidbaker
    added a commit that references this issue on Dec 10, 2025

    [ Widget Preview ] Ignore modifications to files in ephemeral directo…

    104e8f8
  14. Nakiha
    added a commit that references this issue on Sep 28, 2026

    [ Widget Preview ] Ignore modifications to files in ephemeral directo…

    643b390
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