This rule reports all objects including companion objects that extend any type of Throwable. Throwable instances are not intended for reuse as they are stateful and contain mutable information about a specific exception or error. Hence, global singleton Throwables should be avoided. See https://kotlinlang.org/docs/object-declarations.html#object-declarations-overview See https://kotlinlang.org/docs/object-declarations.html#companion-objects

Noncompliant Code

object InvalidCredentialsException : Throwable()

object BanException : Exception()

object AuthException : RuntimeException()

Compliant Code

class InvalidCredentialsException : Throwable()

class BanException : Exception()

class AuthException : RuntimeException()