Report usages of Thread.sleep in suspending functions and coroutine blocks. A thread can contain multiple coroutines at one time due to coroutines' lightweight nature, so if one coroutine invokes Thread.sleep, it could potentially halt the execution of unrelated coroutines and cause unpredictable behavior.

Noncompliant Code

suspend fun foo() {
    Thread.sleep(1_000L)
}

Compliant Code

suspend fun foo() {
    delay(1_000L)
}