Array parameters are compared by reference equality, which is likely an unexpected behavior. It is strongly recommended to override equals() and hashCode() in such cases.

Example:

  data class Text(val lines: Array<String>)

A quick-fix generates missing equals() and hashCode() implementations:

  data class Text(val lines: Array<String>) {
      override fun equals(other: Any?): Boolean {
          if (this === other) return true
          if (javaClass != other?.javaClass) return false

          other as Text

          if (!lines.contentEquals(other.lines)) return false

          return true
      }

      override fun hashCode(): Int {
          return lines.contentHashCode()
      }
  }