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Log stdout in adb.dart#187531

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gmackall:log_stderr
Jun 4, 2026
Merged

Log stdout in adb.dart#187531
auto-submit[bot] merged 6 commits into
flutter:masterfrom
gmackall:log_stderr

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@gmackall

@gmackall gmackall commented Jun 3, 2026

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there are cases where the logs seem to show nothing. Presumably the error was actually on stdout?

Log the stdout as well in each case.

ex:

VMServiceFlutterDriver: Connecting to Flutter application at http://127.0.0.1:35881/RbdYvy0mjAY=/
VMServiceFlutterDriver: Isolate found with number: 996155999383631
VMServiceFlutterDriver: Isolate 996155999383631 is runnable.
VMServiceFlutterDriver: Isolate is paused at start.
VMServiceFlutterDriver: Attempting to resume isolate
VMServiceFlutterDriver: Connected to Flutter application.
D/FlutterJNI( 7695): Sending viewport metrics to the engine.
I/PlatformViewsChannel( 7695): Using legacy platform view rendering strategy.
I/PlatformViewsController( 7695): Using hybrid composition for platform view: 0
I/MESA    ( 7695): exportSyncFdForQSRILocked: call for image 0x7f3d16359350 hos timage handle 0x70004000012d9
I/MESA    ( 7695): exportSyncFdForQSRILocked: got fd: 150
D/FlutterJNI( 7695): Sending viewport metrics to the engine.
I/MESA    ( 7695): exportSyncFdForQSRILocked: call for image 0x7f3d16358fd0 hos timage handle 0x70004000012da
I/MESA    ( 7695): exportSyncFdForQSRILocked: got fd: 157
00:35 +0 -1: (setUpAll) [E]
  Bad state: Failed to disable animations: 
  package:android_driver_extensions/src/backend/android/adb.dart 172:9    Adb.disableAnimations
  ===== asynchronous gap ===========================
  package:android_driver_extensions/src/backend/android/driver.dart 66:5  AndroidNativeDriver.configureForScreenshotTesting
  ===== asynchronous gap ===========================
  test_driver/platform_view/hide_show_hide_main_test.dart 22:5            main.<fn>

https://logs.chromium.org/logs/flutter/buildbucket/cr-buildbucket/8681252155845819249/+/u/run_test.dart_for_android_engine_vulkan_tests_shard_and_subshard_None/stdout

@flutter-dashboard flutter-dashboard Bot added the CICD Run CI/CD label Jun 3, 2026
@gmackall gmackall marked this pull request as ready for review June 3, 2026 19:54
@github-actions github-actions Bot removed the CICD Run CI/CD label Jun 3, 2026

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Code Review

This pull request updates several ADB helper methods in adb.dart to include both stdout and stderr in error messages upon command failure, and updates the corresponding test expectations in adb_fake_io_test.dart. Feedback suggests decoding the binary stdout using utf8.decode in the screencap() method to ensure the error message remains human-readable instead of printing a raw byte list.

Comment on lines +85 to +87
throw StateError(
'Failed to take screenshot: stderr: ${result.stderr}, stdout: ${result.stdout}',
);

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medium

In screencap(), result is an AdbBinaryResult where result.stdout is a Uint8List (binary data). Interpolating a Uint8List directly into a string will print its default string representation (e.g., a list of byte integers like [101, 114, 114, 111, 114] or Instance of 'Uint8List'), which is not human-readable.

To log the actual text output, decode the Uint8List using utf8.decode (from dart:convert).

Suggested change
throw StateError(
'Failed to take screenshot: stderr: ${result.stderr}, stdout: ${result.stdout}',
);
throw StateError(
'Failed to take screenshot: stderr: ${result.stderr}, stdout: ${utf8.decode(result.stdout, allowMalformed: true)}',
);

@gmackall gmackall added the CICD Run CI/CD label Jun 3, 2026
…b.dart

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
@gmackall gmackall requested review from a team and camsim99 and removed request for a team June 4, 2026 16:21
@github-actions github-actions Bot removed the CICD Run CI/CD label Jun 4, 2026
@gmackall gmackall added the CICD Run CI/CD label Jun 4, 2026
@github-actions github-actions Bot removed the CICD Run CI/CD label Jun 4, 2026
@flutter-dashboard flutter-dashboard Bot added the CICD Run CI/CD label Jun 4, 2026

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LGTM

@gmackall gmackall added the autosubmit Merge PR when tree becomes green via auto submit App label Jun 4, 2026
@auto-submit auto-submit Bot added this pull request to the merge queue Jun 4, 2026
Merged via the queue into flutter:master with commit 6579ca9 Jun 4, 2026
174 checks passed
@flutter-dashboard flutter-dashboard Bot removed the autosubmit Merge PR when tree becomes green via auto submit App label Jun 4, 2026
auto-submit Bot pushed a commit to flutter/packages that referenced this pull request Jun 5, 2026
Roll Flutter from 2ba5420a7049 to 1bdf4af29076 (43 revisions)

flutter/flutter@2ba5420...1bdf4af

2026-06-05 engine-flutter-autoroll@skia.org Roll Packages from 03352b5 to 61bdbb4 (5 revisions) (flutter/flutter#187612)
2026-06-05 engine-flutter-autoroll@skia.org Roll Skia from 6e003d7f69c8 to a47a9a2c8ae5 (1 revision) (flutter/flutter#187610)
2026-06-05 engine-flutter-autoroll@skia.org Roll Dart SDK from aad8be4ce307 to 6a9a0efe66eb (10 revisions) (flutter/flutter#187609)
2026-06-05 engine-flutter-autoroll@skia.org Roll Skia from 494f1bf55f51 to 6e003d7f69c8 (2 revisions) (flutter/flutter#187607)
2026-06-05 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from ZE1Jy9CtVVi-tjBAE... to N_LiSaBSUsE2LDZgG... (flutter/flutter#187597)
2026-06-05 engine-flutter-autoroll@skia.org Roll Skia from 59556fdb8c33 to 494f1bf55f51 (2 revisions) (flutter/flutter#187596)
2026-06-04 engine-flutter-autoroll@skia.org Roll Skia from 8eb107046fd5 to 59556fdb8c33 (1 revision) (flutter/flutter#187590)
2026-06-04 34871572+gmackall@users.noreply.github.com Remove `embedded_android_views_integration_test.dart` (flutter/flutter#187465)
2026-06-04 burak.karahan@mail.ru Remove Material imports from rendering editable tests (flutter/flutter#186951)
2026-06-04 jason-simmons@users.noreply.github.com [Impeller] Wait for the Vulkan device to become idle before destroying Vulkan objects in the AHBSwapchainImplVK destructor (flutter/flutter#187477)
2026-06-04 chris@bracken.jp [iOS] Eliminate unnecessary redeclaration of FlutterDisplayLink (flutter/flutter#187557)
2026-06-04 engine-flutter-autoroll@skia.org Roll Skia from 928ded2a31af to 8eb107046fd5 (1 revision) (flutter/flutter#187583)
2026-06-04 34871572+gmackall@users.noreply.github.com Log stdout in adb.dart (flutter/flutter#187531)
2026-06-04 mvincentong@gmail.com Clarify RouterDelegate popRoute bubbling (flutter/flutter#186875)
2026-06-04 engine-flutter-autoroll@skia.org Roll Skia from 928ded2a31af to 8eb107046fd5 (1 revision) (flutter/flutter#187584)
2026-06-04 1063596+reidbaker@users.noreply.github.com Add updating-android-sdk agent skill for rolling Android SDK in CIPD (flutter/flutter#187576)
2026-06-04 Rusino@users.noreply.github.com Fixing alignment issue (flutter/flutter#187518)
2026-06-04 brackenavaron@gmail.com [Material Cross Imports] Clean up Material Divider usages (flutter/flutter#187300)
2026-06-04 engine-flutter-autoroll@skia.org Roll Skia from cecc0e0da9ae to 928ded2a31af (6 revisions) (flutter/flutter#187574)
2026-06-04 31859944+LongCatIsLooong@users.noreply.github.com Use swift demangle to verify internal Swift symbols (flutter/flutter#186835)
2026-06-04 1063596+reidbaker@users.noreply.github.com Add android 37 platform and build tools to script for android cipd bundle creation (flutter/flutter#187571)
2026-06-04 jason-simmons@users.noreply.github.com [Impeller] Increase the precision of the IPSampleWithTileModeOES coords parameter to match the input coordinates in the tiled_texture_fill_external shader (flutter/flutter#187545)
2026-06-04 engine-flutter-autoroll@skia.org Roll Packages from b11504f to 03352b5 (4 revisions) (flutter/flutter#187569)
2026-06-04 iinozemtsev@google.com Roll Dart SDK to Dart 3.13 beta2 (flutter/flutter#187555)
2026-06-04 engine-flutter-autoroll@skia.org Roll Skia from 611e3f8ceb93 to cecc0e0da9ae (1 revision) (flutter/flutter#187562)
2026-06-04 6655696+guidezpl@users.noreply.github.com Add step to bootstrap Flutter tool in coverage workflow (flutter/flutter#187199)
2026-06-04 engine-flutter-autoroll@skia.org Roll Skia from 4fdb859c8da7 to 611e3f8ceb93 (4 revisions) (flutter/flutter#187554)
2026-06-04 engine-flutter-autoroll@skia.org Roll Skia from 0020aae33f63 to 4fdb859c8da7 (2 revisions) (flutter/flutter#187552)
2026-06-04 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from ap7MhLX4TdpWRrLS_... to ZE1Jy9CtVVi-tjBAE... (flutter/flutter#187550)
2026-06-04 stuartmorgan@google.com Add vector_math to package issue template (flutter/flutter#187536)
2026-06-04 jason-simmons@users.noreply.github.com Manual roll Dart SDK from d39850bf4a01 to 3b70b98fa7c0 (flutter/flutter#187519)
2026-06-04 engine-flutter-autoroll@skia.org Roll Skia from d625048c853a to 0020aae33f63 (20 revisions) (flutter/flutter#187539)
2026-06-04 smille2003@yandex.ru [Impeller][Windows] fix black screen on OpenGL fallback (flutter/flutter#187288)
2026-06-04 97480502+b-luk@users.noreply.github.com Fix unintentionally joined path contours (flutter/flutter#187522)
2026-06-03 matt.boetger@gmail.com fix: resolve issue #177379 by using lazy buildDirectory.dir() API in build.gradle template (flutter/flutter#187127)
2026-06-03 34871572+gmackall@users.noreply.github.com Add a skill for flake analysis (flutter/flutter#187530)
2026-06-03 30870216+gaaclarke@users.noreply.github.com adds linux impeller project flag (flutter/flutter#186982)
2026-06-03 codedoctor@linwood.dev Add support for stylus buttons (flutter/flutter#183369)
2026-06-03 46920873+gabrimatic@users.noreply.github.com Prevent Cubic transform from looping on out-of-range input (flutter/flutter#185875)
2026-06-03 bdero@google.com [Impeller] Reland: Allow attaching specific texture mip levels and slices (flutter/flutter#187470)
2026-06-03 kjlubick@users.noreply.github.com [skia] Update image deserial proc (flutter/flutter#185041)
2026-06-03 112751483+shivanshu877@users.noreply.github.com docs: update Impeller advanced blend docs for framebuffer fetch (flutter/flutter#185457)
2026-06-03 ahmedsameha1@gmail.com Handle#6537 fifth grouped tests (flutter/flutter#183720)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
...
creatorpiyush pushed a commit to creatorpiyush/packages that referenced this pull request Jun 10, 2026
…r#11849)

Roll Flutter from 2ba5420a7049 to 1bdf4af29076 (43 revisions)

flutter/flutter@2ba5420...1bdf4af

2026-06-05 engine-flutter-autoroll@skia.org Roll Packages from 03352b5 to 61bdbb4 (5 revisions) (flutter/flutter#187612)
2026-06-05 engine-flutter-autoroll@skia.org Roll Skia from 6e003d7f69c8 to a47a9a2c8ae5 (1 revision) (flutter/flutter#187610)
2026-06-05 engine-flutter-autoroll@skia.org Roll Dart SDK from aad8be4ce307 to 6a9a0efe66eb (10 revisions) (flutter/flutter#187609)
2026-06-05 engine-flutter-autoroll@skia.org Roll Skia from 494f1bf55f51 to 6e003d7f69c8 (2 revisions) (flutter/flutter#187607)
2026-06-05 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from ZE1Jy9CtVVi-tjBAE... to N_LiSaBSUsE2LDZgG... (flutter/flutter#187597)
2026-06-05 engine-flutter-autoroll@skia.org Roll Skia from 59556fdb8c33 to 494f1bf55f51 (2 revisions) (flutter/flutter#187596)
2026-06-04 engine-flutter-autoroll@skia.org Roll Skia from 8eb107046fd5 to 59556fdb8c33 (1 revision) (flutter/flutter#187590)
2026-06-04 34871572+gmackall@users.noreply.github.com Remove `embedded_android_views_integration_test.dart` (flutter/flutter#187465)
2026-06-04 burak.karahan@mail.ru Remove Material imports from rendering editable tests (flutter/flutter#186951)
2026-06-04 jason-simmons@users.noreply.github.com [Impeller] Wait for the Vulkan device to become idle before destroying Vulkan objects in the AHBSwapchainImplVK destructor (flutter/flutter#187477)
2026-06-04 chris@bracken.jp [iOS] Eliminate unnecessary redeclaration of FlutterDisplayLink (flutter/flutter#187557)
2026-06-04 engine-flutter-autoroll@skia.org Roll Skia from 928ded2a31af to 8eb107046fd5 (1 revision) (flutter/flutter#187583)
2026-06-04 34871572+gmackall@users.noreply.github.com Log stdout in adb.dart (flutter/flutter#187531)
2026-06-04 mvincentong@gmail.com Clarify RouterDelegate popRoute bubbling (flutter/flutter#186875)
2026-06-04 engine-flutter-autoroll@skia.org Roll Skia from 928ded2a31af to 8eb107046fd5 (1 revision) (flutter/flutter#187584)
2026-06-04 1063596+reidbaker@users.noreply.github.com Add updating-android-sdk agent skill for rolling Android SDK in CIPD (flutter/flutter#187576)
2026-06-04 Rusino@users.noreply.github.com Fixing alignment issue (flutter/flutter#187518)
2026-06-04 brackenavaron@gmail.com [Material Cross Imports] Clean up Material Divider usages (flutter/flutter#187300)
2026-06-04 engine-flutter-autoroll@skia.org Roll Skia from cecc0e0da9ae to 928ded2a31af (6 revisions) (flutter/flutter#187574)
2026-06-04 31859944+LongCatIsLooong@users.noreply.github.com Use swift demangle to verify internal Swift symbols (flutter/flutter#186835)
2026-06-04 1063596+reidbaker@users.noreply.github.com Add android 37 platform and build tools to script for android cipd bundle creation (flutter/flutter#187571)
2026-06-04 jason-simmons@users.noreply.github.com [Impeller] Increase the precision of the IPSampleWithTileModeOES coords parameter to match the input coordinates in the tiled_texture_fill_external shader (flutter/flutter#187545)
2026-06-04 engine-flutter-autoroll@skia.org Roll Packages from b11504f to 03352b5 (4 revisions) (flutter/flutter#187569)
2026-06-04 iinozemtsev@google.com Roll Dart SDK to Dart 3.13 beta2 (flutter/flutter#187555)
2026-06-04 engine-flutter-autoroll@skia.org Roll Skia from 611e3f8ceb93 to cecc0e0da9ae (1 revision) (flutter/flutter#187562)
2026-06-04 6655696+guidezpl@users.noreply.github.com Add step to bootstrap Flutter tool in coverage workflow (flutter/flutter#187199)
2026-06-04 engine-flutter-autoroll@skia.org Roll Skia from 4fdb859c8da7 to 611e3f8ceb93 (4 revisions) (flutter/flutter#187554)
2026-06-04 engine-flutter-autoroll@skia.org Roll Skia from 0020aae33f63 to 4fdb859c8da7 (2 revisions) (flutter/flutter#187552)
2026-06-04 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from ap7MhLX4TdpWRrLS_... to ZE1Jy9CtVVi-tjBAE... (flutter/flutter#187550)
2026-06-04 stuartmorgan@google.com Add vector_math to package issue template (flutter/flutter#187536)
2026-06-04 jason-simmons@users.noreply.github.com Manual roll Dart SDK from d39850bf4a01 to 3b70b98fa7c0 (flutter/flutter#187519)
2026-06-04 engine-flutter-autoroll@skia.org Roll Skia from d625048c853a to 0020aae33f63 (20 revisions) (flutter/flutter#187539)
2026-06-04 smille2003@yandex.ru [Impeller][Windows] fix black screen on OpenGL fallback (flutter/flutter#187288)
2026-06-04 97480502+b-luk@users.noreply.github.com Fix unintentionally joined path contours (flutter/flutter#187522)
2026-06-03 matt.boetger@gmail.com fix: resolve issue #177379 by using lazy buildDirectory.dir() API in build.gradle template (flutter/flutter#187127)
2026-06-03 34871572+gmackall@users.noreply.github.com Add a skill for flake analysis (flutter/flutter#187530)
2026-06-03 30870216+gaaclarke@users.noreply.github.com adds linux impeller project flag (flutter/flutter#186982)
2026-06-03 codedoctor@linwood.dev Add support for stylus buttons (flutter/flutter#183369)
2026-06-03 46920873+gabrimatic@users.noreply.github.com Prevent Cubic transform from looping on out-of-range input (flutter/flutter#185875)
2026-06-03 bdero@google.com [Impeller] Reland: Allow attaching specific texture mip levels and slices (flutter/flutter#187470)
2026-06-03 kjlubick@users.noreply.github.com [skia] Update image deserial proc (flutter/flutter#185041)
2026-06-03 112751483+shivanshu877@users.noreply.github.com docs: update Impeller advanced blend docs for framebuffer fetch (flutter/flutter#185457)
2026-06-03 ahmedsameha1@gmail.com Handle#6537 fifth grouped tests (flutter/flutter#183720)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
...
via-guy pushed a commit to via-guy/flutter that referenced this pull request Jun 26, 2026
there are cases where the logs seem to show nothing. Presumably the
error was actually on stdout?

Log the stdout as well in each case.

ex:
```
VMServiceFlutterDriver: Connecting to Flutter application at http://127.0.0.1:35881/RbdYvy0mjAY=/
VMServiceFlutterDriver: Isolate found with number: 996155999383631
VMServiceFlutterDriver: Isolate 996155999383631 is runnable.
VMServiceFlutterDriver: Isolate is paused at start.
VMServiceFlutterDriver: Attempting to resume isolate
VMServiceFlutterDriver: Connected to Flutter application.
D/FlutterJNI( 7695): Sending viewport metrics to the engine.
I/PlatformViewsChannel( 7695): Using legacy platform view rendering strategy.
I/PlatformViewsController( 7695): Using hybrid composition for platform view: 0
I/MESA    ( 7695): exportSyncFdForQSRILocked: call for image 0x7f3d16359350 hos timage handle 0x70004000012d9
I/MESA    ( 7695): exportSyncFdForQSRILocked: got fd: 150
D/FlutterJNI( 7695): Sending viewport metrics to the engine.
I/MESA    ( 7695): exportSyncFdForQSRILocked: call for image 0x7f3d16358fd0 hos timage handle 0x70004000012da
I/MESA    ( 7695): exportSyncFdForQSRILocked: got fd: 157
00:35 +0 -1: (setUpAll) [E]
  Bad state: Failed to disable animations: 
  package:android_driver_extensions/src/backend/android/adb.dart 172:9    Adb.disableAnimations
  ===== asynchronous gap ===========================
  package:android_driver_extensions/src/backend/android/driver.dart 66:5  AndroidNativeDriver.configureForScreenshotTesting
  ===== asynchronous gap ===========================
  test_driver/platform_view/hide_show_hide_main_test.dart 22:5            main.<fn>
```

https://logs.chromium.org/logs/flutter/buildbucket/cr-buildbucket/8681252155845819249/+/u/run_test.dart_for_android_engine_vulkan_tests_shard_and_subshard_None/stdout

---------

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
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