compiler/testData/codegen/patternMatching/exceptionOnNoMatch.kt - third_party/github/JetBrains/kotlin - Git at Google

 fun isZero(x: Int) = when(x) {
   0 -> true
   else -> throw Exception()
 }
	fun isZero(x: Int) = when(x) {
	0 -> true
	else -> throw Exception()
	}