Nullability warning in OIDExternalUserAgentIOS

[PGaissert]

In version 1.2.0 of AppAuth I get a nullability warning in Xcode 10.3 (10G8) at the follow line of code:

@interface OIDExternalUserAgentIOS : NSObject
- (nullable instancetype)init API_AVAILABLE(ios(11))
__deprecated_msg("This method will not work on iOS 13, use "
"initWithPresentingViewController:presentingViewController");

the warning reads:
Conflicting nullability specifier on return types, 'nullable' conflicts with existing specifier 'nonnull'

For the time being I amended the issue be surrounding the line of code with:
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wnullability"
- (nullable instancetype)init API_AVAILABLE(ios(11))
__deprecated_msg("This method will not work on iOS 13, use "
"initWithPresentingViewController:presentingViewController");
#pragma clang diagnostic pop

Would be great if you could fix this in the next version.

[bpollman]

Is there any reason not to merge this? Would love to see these warnings get cleaned up.

[Parameswaran-Irulandi]

Can you please merge this PR?

[bryanrahn]

Can we merge this in?

To save others the headache, your project (after performing Clean Build Folder) if you have SWIFT_TREAT_WARNINGS_AS_ERRORS = YES in your build settings will fail to compile.

[Wooder]

Is there a reason not to merge this? Maybe that's just been forgotten?

[below]

Probably because this is more a problem of project configuration: I have an old project, where I get this issue (an error actually) after trying to update AppAuth.
In a brand new project, however, I don't get any warning.

I am out of ideas why this is the case …