[windows] Propagate startup errors in template #63612
Merged
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Description
Adjusts the startup flow in the Windows app template slightly so that an
engine initialization failure will correctly cause
FlutterWindow::CreateAndShow to return false.
Related Issues
Fixes #61968
Tests
I added the following tests: None; would require special-purpose e2e testing of a failure case that only happens when using the build output incorrectly.
Checklist
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).flutter analyze --flutter-repo
) does not report any problems on my PR.Breaking Change
Did any tests fail when you ran them? Please read Handling breaking changes.