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"Unable to read Dart source"? #6523
Description
I don't think I was doing anything particularly noteworthy, I just tried to start a random app I'd written, and got the following (nothing ran on the device as far as I saw):
$ flutter --local-engine 'android_debug_unopt' run --pid-file /tmp/run.pid
Running 'pub get' in dummy... 483ms
Building APK in debug mode (android_debug_unopt)...
Warning: signing the APK using the debug keystore.
Built build/app.apk (9.2MB).
Launching loader on Nexus 6...
--------- beginning of system
W/ActivityManager: Permission Denial: Accessing service ComponentInfo{com.google.android.music/com.google.android.music.dial.DialMediaRouteProviderService} from pid=9788, uid=10090 that is not exported from uid 10070
Observatory listening on http://127.0.0.1:8100
Diagnostic server listening on http://127.0.0.1:8101
W/ActivityManager: Scheduling restart of crashed service com.google.android.gms/.feedback.FeedbackService in 1000ms
I/flutter : [INFO:SkFontMgr_android.cpp(163)] Requested font file /system/fonts/DroidSansFallback.ttf does not exist or cannot be opened.
I/flutter :
Syncing files to device... 3198ms
Synced 5.2MB.
Connected to _flutterView/0xa80163b0.
Running lib/main.dart on Nexus 6...
E/flutter : [ERROR:../../lib/tonic/file_loader/file_loader.cc(155)] error: Unable to read Dart source 'package:flutter/rendering.dart'.
W/flutter : LEAK: 20 RenderObject
Application finished.
W/ActivityManager: Force removing ActivityRecord{aac47b2 u0 com.yourcompany.dummy/org.domokit.sky.shell.SkyActivity t363}: app died, no saved state
W/ActivityManager: Unable to start service Intent { act=com.urbanairship.location.ACTION_CHECK_LOCATION_UPDATES cmp=uk.co.economist/com.urbanairship.location.LocationService (has extras) } U=0: not found
Activity
johnmccutchan commentedon Oct 26, 2016
@Hixie was this a one-off failure or repeatable? We may have a race where we are still writing files to DevFS while we are launching.
Hixie commentedon Oct 26, 2016
I only noticed it once yesterday.
johnmccutchan commentedon Nov 30, 2016
I haven't seen this in along time.
One thing of note is that on Android we are using a directory that the system can choose to clear at anytime.
Hixie commentedon Dec 20, 2016
Going to close this since I don't see it anymore. Please reopen if it's something for which we could add defense in depth and make the error case more graceful.
cbracken commentedon Feb 8, 2018
I suspect @Hixie didn't have any spaces or characters other than plain alpha-numerics in his paths, but for future archaeologists, this typically occurs when:
The fix to 1 is tracked by #6577, fixed in the engine by flutter-team-archive/engine#4650.
Add support for text shadows and roll engine (26 commits) (#22449)
Roll engine 4c79e42..2586e94 (15 commits)
Roll engine 4c79e42..2586e94 (15 commits) (#23428)
Roll engine 4c79e42..2586e94 (15 commits) (flutter#23428)
github-actions commentedon Sep 4, 2021
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.