Explicitly remember the boxed version

Author: dkhalanskyjb

Diff for: kotlinx-coroutines-core/common/src/internal/LockFreeLinkedList.common.kt

@@ -145,6 +145,7 @@ internal open class LockFreeLinkedListSegment(
     fun tryAdd(node: LockFreeLinkedListNode, permissionsBitmask: Byte, indexInSegment: Int): Boolean {
         if (cells[indexInSegment].compareAndSet(null, node)) return true
         cells[indexInSegment].loop { value ->
+            val valueAsAny: Any? = value // explicitly remember the boxed value; the type must be explicitly written
             // This means that some elements are forbidden from entering the list.
             value as BrokenForSomeElements
             // Are *we* forbidden from entering the list?
@@ -154,7 +155,7 @@ internal open class LockFreeLinkedListSegment(
                 return false
             }
             // We aren't forbidden. Let's try entering it.
-            if (cells[indexInSegment].compareAndSet(value, node)) return true
+            if (cells[indexInSegment].compareAndSet(valueAsAny, node)) return true
         }
     }