MaterialApp's builder function breaks provider. Home: does not

[feyokorenhof]

Describe the bug

I have to use MaterialApp's builder function instead of home to ensure MediaQuery applies to nested routes. But for some reason this breaks provider and gives me a lot of ProviderNotFoundException. I am unsure if this is a bug in Provider, Flutter or a mistake I'm doing but I've tried a lot of variations with placing my MultiProvider above and below MaterialApp and placing widgets in-between them but nothing seems to work.

EDIT: it looks like the errors only show up when I use Navigator.push() I really don't understand why this would be the case when using builder instead of home.

To Reproduce

use MaterialApp's builder function instead of home parameter.

This does not crash:

MultiProvider(
    providers: [
        ChangeNotifierProvider(create: (_) => CarouselProvider()),
         ...
    ],
    child:
            MaterialApp(
                  home:
    Consumer<CarouselProvider>(builder: (context, csp, child) => ANestedWidget(context));
                  ));

This does:

MultiProvider(
    providers: [
        ChangeNotifierProvider(create: (_) => CarouselProvider()),
         ...
    ],
    child: MaterialApp(
                  builder: (context, child) {
                       // Nested widgets inside this consumer give a `ProviderNotFoundException`. Consumer itself does not.
                       return Consumer<CarouselProvider>(builder: (context, csp, child) => ANestedWidget(context));
                  }));

Expected behavior For provider to still work when using the builder function.

I'm sorry if this is a silly mistake or not a provider bug but I'm out of ideas. Any help is appreciated!!

[rrousselGit]

I don't understand your "This does not crash" code. There's no home parameter on MultiProvider

[feyokorenhof]

Ah, my bad I messed that up. Edited the code.

It's about the MaterialApp builder and home function.

[rrousselGit]

I'm not aware of a specific reason why that would happen. Could you make a complete reproducible example? Something executable that's also short

[feyokorenhof]

I'm going down quite the rabbit hole atm :p. It looks like It might actually be a problem of using the context used by pushing a new MaterialPageRoute with Navigator.of(context).push(). I'll do some more testing and come back to you.

Thanks for the quick responses!

[feyokorenhof]

We managed to fix our problem without using builder so this is no longer an issue for us. I'm still curious as to how this behavior happened to us so I might come back to it later just for fun.

But we can close this issue afaic :).