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[ Widget Preview ] Running flutter pub get after adding a plugin dependency causes the previewer to crash #178317
Description
To reproduce:
- Run
flutter widget-preview start --web-serverin 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
bkonyi commentedon Nov 12, 2025
This issue can be worked around by executing
flutter pub getafter updating Flutter or adding / updating dependencies to a project and then restarting the widget previewer. For IDE users, this simply requires restarting the IDE.[ Widget Preview ] Ignore modifications to files in ephemeral directo…
[ Widget Preview ] Ignore modifications to files in ephemeral directo…
[ Widget Preview ] Ignore modifications to files in ephemeral directo…
[ Widget Preview ] Ignore modifications to files in ephemeral directo…
[CP-stable][ Widget Preview ] Ignore modifications to files in epheme…
[CP-beta][ Widget Preview ] Ignore modifications to files in ephemera…
[ Widget Preview ] Ignore modifications to files in ephemeral directo…
github-actions commentedon Nov 27, 2025
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 -vand a minimal reproduction of the issue.[ Widget Preview ] Ignore modifications to files in ephemeral directo…
[ Widget Preview ] Ignore modifications to files in ephemeral directo…
[ Widget Preview ] Ignore modifications to files in ephemeral directo…