At which part of coroutine execution does an infinite loop occur, if it exists inside?

If there is an infinite loop inside a coroutine in Android (for example, using Kotlin Coroutines), this loop will execute at the moment the coroutine is called, when it starts executing, that is, on the first call to resume or when launched via launch or async.

A coroutine can be thought of as a function that is suspended and resumed. If the body of the coroutine contains an infinite loop without suspension points (suspend functions), then the coroutine will block the thread in which it is running, executing this loop infinitely.

To avoid blocking, infinite loops in coroutines usually contain calls to suspend functions, such as delay(), which allow the coroutine to suspend and free the thread.

Example of an infinite loop with suspension:

launch {
    while (true) {
        // some work
        delay(1000) // suspend the coroutine for 1 second
    }
}

If delay or other suspend calls are absent, the loop will run infinitely immediately upon starting the coroutine, blocking the thread.