Regression "warning: [cast] redundant cast to Map" when updating from 2.49 to 2.50

[TWiStErRob]

Repro Steps

1. Clone https://github.com/TWiStErRob/repros/tree/main/dagger/hilt-viewmodel-redundant-cast-Map
2. gradlew build

Expected

BUILD SUCCESSFUL

Actual

> Task :hiltJavaCompileDebug FAILED
P:\projects\bugs\dagger\hilt-viewmodel-redundant-cast-Map\build\generated\hilt\component_sources\debug\com\example\DaggerApp_HiltComponents_SingletonC.java:402: warning: [cast] redundant cast to Map
      return (Map) Collections.<String, javax.inject.Provider<ViewModel>>singletonMap("com.example.MyViewModel", ((Provider) myViewModelProvider));
             ^
error: warnings found and -Werror specified
1 error
1 warning

Control

1. rm -rf build .gradle (Hard clean necessary for some reason when changing version)
2. Edit build.gradle.kts: s/2.50/2.49/g
3. gradlew build -> success

Context

There's a project that slowly migrates from Java 1.7 to Kotlin. The sourceCompatibility is intentionally kept low, so that the existing codebase doesn't show full of warnings ("can use lambdas") on all anonymous inner class listeners and other places. Up until 2.49 there was no issue, but when I updated to 2.50, I started getting this issue. The 2.50 release notes doesn't show anything relevant.

[Chang-Eric]

Thanks for reporting this. This got introduced in the last release because the Map types now hold different Provider types due to the Jakarta changes, and now may not be easily made to match the types request. I'll send a fix to suppress this warning.