>>> class B { override fun toString(): String { return foo() } ; fun foo(): String { return error("message") } }
>>> B().toString()
java.lang.IllegalStateException: message
	at Line_0$B.foo(Line_0.kts:1)
	at Line_0$B.toString(Line_0.kts:1)
	at Line_1.<init>(Line_1.kts:1)