IssueTracker

Component used: lifecycle-livedata-ktx
Version used: 2.3.0-alpha03
Devices/Android versions reproduced on: N/A

If MutableLiveData is not a private field, lint NullSafeMutableLiveData occurs error.

class Sample {
    // error
    val test = MutableLiveData<String>()
    
    // No error
    // private val test = MutableLiveData<String>()

    fun foo() {
        test.value = "test"
    }
}

Error log

> Lint found errors in the project; aborting build.
  
  Fix the issues identified by lint, or add the following to your build script to proceed with errors:
  ...
  android {
      lintOptions {
          abortOnError false
      }
  }
  ...
  
  Errors found:
  
  /some_path/Sample.kt: Error: Unexpected failure during lint analysis of Sample.kt (this is a bug in lint or one of the libraries it depends on)
  
  Message: org.jetbrains.kotlin.asJava.elements.KtLightMethodImpl cannot be cast to com.intellij.psi.PsiVariable
  
  The crash seems to involve the detector androidx.lifecycle.lint.NonNullableMutableLiveDataDetector.
  You can try disabling it with something like this:
      android {
          lintOptions {
              disable "NullSafeMutableLiveData"
          }
      }
  
  Stack: ClassCastException:NonNullableMutableLiveDataDetector.visitMethodCall(NonNullableMutableLiveDataDetector.kt:83)←UElementVisitor$DelegatingPsiVisitor.visitMethodCallExpression(UElementVisitor.kt:1082)←UElementVisitor$DelegatingPsiVisitor.visitCallExpression(UElementVisitor.kt:1062)←UCallExpression$DefaultImpls.accept(UCallExpression.kt:85)←UCallExpressionEx$DefaultImpls.accept(UCallExpression.kt:-1)←KotlinUSimpleReferenceExpression$KotlinAccessorCallExpression.accept(KotlinUSimpleReferenceExpression.kt:129)←KotlinUSimpleReferenceExpression.visitAccessorCalls(KotlinUSimpleReferenceExpression.kt:116)←KotlinUSimpleReferenceExpression.accept(KotlinUSimpleReferenceExpression.kt:83)
  
  You can set environment variable LINT_PRINT_STACKTRACE=true to dump a full stacktrace to stdout. [LintError]