NPE when stub lambda since K2

[ganadist]

• Reproducible step

$ git clone https://github.com/ganadist/minimal-reproducible-example -b k2-stub-lambda-npe k2
Cloning into 'k2'...

$ cd k2
$ git checkout HEAD~1

# perform unittest with kotlin 1.9.23
$ ./gradlew :app:tDDUT
...
MainActivityTest > test1 STARTED

OpenJDK 64-Bit Server VM warning: Sharing is only supported for boot loader classes because bootstrap classpath has been appended

MainActivityTest > test1 PASSED


$ git checkout origin/k2-stub-lambda-npe

# perform unittest with kotlin 2.0.20
$ ./gradlew :app:tDDUT

MainActivityTest > test1 STARTED

OpenJDK 64-Bit Server VM warning: Sharing is only supported for boot loader classes because bootstrap classpath has been appended

MainActivityTest > test1 FAILED
    org.mockito.kotlin.MockitoKotlinException at MainActivityTest.kt:41
        Caused by: java.lang.NullPointerException at MainActivityTest.kt:41


org.mockito.kotlin.MockitoKotlinException: NullPointerException thrown when stubbing. 
   This may be due to two reasons: 
     The method you're trying to stub threw an NPE: look at the stack trace below; 
     You're trying to stub a generic method: try `onGeneric` instead.

Test code : https://github.com/ganadist/minimal-reproducible-example/blob/k2-stub-lambda-npe/app/src/test/java/com/example/myapplication/MainActivityTest.kt#L39-L42

Stacktrace on Gradle Scan

[ganadist]

After switch to use onGeneric instead of on , test was passed.