Mocking lambda that returns Nothing throws KotlinNothingValueException

[zakhenry]

Expected Behavior

The following code should work

fun main() {


    fun exampleLambdaThrows(callbackReturnsNothing: () -> Nothing) {
        callbackReturnsNothing()
    }


    val mockCallback = mockk<() -> Nothing>()

    every { mockCallback() } throws Exception("mock exception")

    assertFailsWith<Exception> {
        exampleLambdaThrows(mockCallback)
    }


    verify { mockCallback() }

}

Please describe the behavior you are expecting

Current Behavior

The code above throws Exception in thread "main" kotlin.KotlinNothingValueException

Context

Please provide any relevant information about your setup. This is important in case the issue is not reproducible except for under certain conditions.

• MockK version:
• OS: MacOS
• Kotlin version: 1.6.10
• JDK version: 17.0.2
• Type of test: unit test