Xaml Source Generator generates nullable warnings, we have warnings as errors.

[malware-dev]

Description

When the xaml source generator produces code, it is not nullable aware - or at least not completely. This means that some of its code generates nullability errors. We have a strong no-warning policy in our company since warnings are just hidden bugs, so this makes xaml generation not something we can use.

Good news is that even in our sizable app it seems like there were no other errors that were not of our own making!

Steps to Reproduce

No response

Link to public reproduction project repository

No response

Version with bug

10.0.40

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

iOS, Android

Affected platform versions

No response

Did you find any workaround?

Switch off warnings as error (not an option)

Relevant log output

[StephaneDelcroix]

please provide a repro project so we can fix.

[MihuBot]

I'm a bot. Here are possible duplicate issues (I may be wrong):

• MAUI Xaml SourceGen breaks when nullable is enabled and <WarningsAsErrors>Nullable</WarningsAsErrors> is set #32893
• [.NET 10] Xaml Source Gen - Null reference warnings #32706
• [Bug] Can't build Maui app when nullable is enabled with WarningAsError #2301
• error CS8603: Possible null reference return in generated code using SourceGen #32478

[StephaneDelcroix]

@malware-dev we still need a small repro

[malware-dev]

I'm sorry, I only got to it now - weekend and all :D And; how annoying, I registered this under the wrong username. Oh well, can't be helped now.

XamlSourceGenNullabilityRepro.zip