// CHECK JVM_IR:
//   Mangled name: #problematic(kotlin.collections.List<kotlin.collections.List<0:0>>){0§<kotlin.Any?>}kotlin.collections.List<0:0>
//   Public signature: /problematic|-8622452458410513914[0]
//   Public signature debug description: problematic(kotlin.collections.List<kotlin.collections.List<0:0>>){0§<kotlin.Any?>}kotlin.collections.List<0:0>
fun <T : Any?> problematic(lss: List<List<T>>): List<T>

