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[PR #15397] Leak the window when it closes on Windows 10 #30625

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opened 2026-01-31 09:41:55 +00:00 by claunia · 0 comments
claunia commented 2026-01-31 09:41:55 +00:00
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Original Pull Request: https://github.com/microsoft/terminal/pull/15397

State: closed
Merged: Yes

Re: #15384

Basically, when we close a DesktopWindowXamlSource, it calls to Windows_UI_Xaml!DirectUI::MetadataAPI::Reset, which resets the XAML metadata provider for the process. So, closing one DWXS on one thread will force an A/V next time another thread tries to do something like... display a tooltip. Not immediately, but surely soon enough.

This was fixed in Windows 11 by os.2020!5837001. That wasn't backported to Windows 10.

This will cause a ~15MB memory leak PER WINDOW. OBVIOUSLY, this is bad, but it's less bad than crashing.

We're gonna keep using #15384 for other ideas here too.

**Original Pull Request:** https://github.com/microsoft/terminal/pull/15397 **State:** closed **Merged:** Yes --- Re: #15384 Basically, when we close a `DesktopWindowXamlSource`, it calls to `Windows_UI_Xaml!DirectUI::MetadataAPI::Reset`, which resets the XAML metadata provider _for the process_. So, closing one DWXS on one thread will force an A/V next time another thread tries to do something like... display a tooltip. Not immediately, but surely soon enough. This was fixed in Windows 11 by os.2020!5837001. That wasn't backported to Windows 10. This will cause a ~15MB memory leak PER WINDOW. OBVIOUSLY, this is bad, but it's less bad than crashing. We're gonna keep using #15384 for other ideas here too.
claunia added the pull-request label 2026-01-31 09:41:55 +00:00
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Reference: starred/terminal#30625
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