>>> class B { override fun toString(): String { return foo() } ; fun foo(): String { return error("message") } }
>>> B().toString()
java.lang.IllegalStateException: message
	at Line1$B.foo(line1.kts:1)
	at Line1$B.toString(line1.kts:1)
>>> B()
java.lang.IllegalStateException: message
	at Line1$B.foo(line1.kts:1)
	at Line1$B.toString(line1.kts:1)