No Overlay widget found - When showing snackbar - with 2 Material widgets above it. about flutter HOT 3 OPEN

@stan-at-work
Can you provide a runnable reproducible code sample that triggers this exception ?

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@stan-at-work Can you provide a runnable reproducible code sample that triggers this exception ?

Sure, i will create an application. should be done in a couple of days

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It looks like apps created with Material.router(...) method falls into this condition inside WidgetsApp:

https://github.com/flutter/flutter/blob/master/packages/flutter/lib/src/widgets/app.dart#L1673
Navigator (which builds the Overlay) is created on the "else" statement only...

Then, inside the router delegator, we read this statement: https://github.com/flutter/flutter/blob/master/packages/flutter/lib/src/widgets/router.dart#L1259
Which makes me think that the router delegate expects a Navigator, but it's not mandatory (hence the words "...typically a [Navigator]...").

After saying this, I don't know if it's a Flutter problem (eg: lack of enforcing the RouteDelegator to provide a real Navigator) or a problem of other packages (eg: GoRouter, which implements their own RouterDelegate + _CustomNavigator without rendering a Overlay)
https://github.com/flutter/packages/blob/main/packages/go_router/lib/src/delegate.dart#L18
https://github.com/flutter/packages/blob/main/packages/go_router/lib/src/builder.dart#L126

PS: I am not sure if that's the root cause of the issue btw. I just shared what I could find hehe.

As a workaround for me atm, I am building an overlay via the MaterialApp.router(builder: ...) property.

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