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Ignore stdout in WindowsTest.LaunchMainHasNoOutput#167583

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jason-simmons:bug_167418_windows_stdout
Apr 22, 2025
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Ignore stdout in WindowsTest.LaunchMainHasNoOutput#167583
auto-submit[bot] merged 1 commit intoflutter:masterfrom
jason-simmons:bug_167418_windows_stdout

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@jason-simmons jason-simmons commented Apr 22, 2025

The stdout stream may receive expected output printed by Dart (specifically the message announcing the URL where the Dart VM service is listening)

See #167418

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Ignore stdout in WindowsTest.LaunchMainHasNoOutput
9f1fa56 
The stdout stream may receive expected output printed by Dart (specifically
the message announcing the URL where the Dart VM service is listening)

See flutter#167418
@github-actions github-actions bot added engine flutter/engine related. See also e: labels. platform-windows Building on or for Windows specifically a: desktop Running on desktop labels Apr 22, 2025
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knopp commented Apr 22, 2025 •
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So, this makes sense, the default implementation of log_message_callback is using std::cout, and windows embedder doesn't override it, so it should appear in the rdbuf, but I've repeated the test 10000 times today and it never failed even though it should, so this does bother me a bit.

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knopp commented Apr 22, 2025

I see. In my case the VMService announcement is always printed after stdout_capture.Stop();. I think maybe better way to fix this would be to have a proper dart entry point and then wait until signalled and check that stdout only contains the vmservice announcement?

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knopp commented Apr 22, 2025

Actually, the VMService announcement gets printed after main, I'm not sure if there is a way to reliably wait for it except watching stdout. So maybe it's not really worth doing that.

@jason-simmons jason-simmons added the autosubmit Merge PR when tree becomes green via auto submit App label Apr 22, 2025
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cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
736b4a0 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Apr 23, 2025
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cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
a87a768 
…lutter#167583)
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loic-sharma commented Apr 23, 2025

Thanks @jason-simmons!

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cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
ccf6239 
…lutter#167583)
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cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
8bf4502 
…lutter#167583)
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cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
055be27 
…lutter#167583)
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cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
0e72604 
…lutter#167583)
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cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
ae96c41 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Apr 29, 2025
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cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
ad9d046 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Apr 29, 2025
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cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
8c4d544 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Apr 29, 2025
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cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
c805fb3 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Apr 30, 2025
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cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
fda02eb 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Apr 30, 2025
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cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
8d162f6 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 1, 2025
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cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
24bcdb6 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 1, 2025
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cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
a5c6e45 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 1, 2025
@engine-flutter-autoroll
cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
281f850 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 1, 2025
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cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
a6fe910 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 1, 2025
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cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
55288e3 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 1, 2025
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cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
ebed6e2 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 1, 2025
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cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
0f808e9 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 2, 2025
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cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
230c7e6 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 2, 2025
@engine-flutter-autoroll
cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
a9cdf59 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 2, 2025
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cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
c117ac7 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 2, 2025
@engine-flutter-autoroll
cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
2046239 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 2, 2025
@engine-flutter-autoroll
cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
a4e2d00 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 3, 2025
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cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
de16aca 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 3, 2025
@engine-flutter-autoroll
cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
0da7150 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 4, 2025
@engine-flutter-autoroll
cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
13e544b 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 5, 2025
@engine-flutter-autoroll
cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
5a6dfe9 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 5, 2025
@engine-flutter-autoroll
cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
82efc13 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 5, 2025
@engine-flutter-autoroll
cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
5946194 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 5, 2025
@engine-flutter-autoroll
cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
f4398fb 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 5, 2025
@engine-flutter-autoroll
cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
9dcc8bb 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 5, 2025
@engine-flutter-autoroll
cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
a887ffb 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 5, 2025
@engine-flutter-autoroll
cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
190068e 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 5, 2025
@engine-flutter-autoroll
cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
cae6e7f 
…lutter#167583)
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 6, 2025
@engine-flutter-autoroll
cddd4ac Ignore stdout in WindowsTest.LaunchMainHasNoOutput (flutter/f…
712d9a1 
…lutter#167583)
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