CoroutinesTimeout dumps too few jobs

[cy6erGn0m]

CoroutinesTimeout rule doesn't capture some coroutines started during a test since the coroutines dump magic installation is too late.

Running the following test (should always fail with timeout) produces coroutines dump with only "job2" and no "job1".

import kotlinx.coroutines.*
import kotlinx.coroutines.debug.junit4.*
import org.junit.*

class DumpTest {
    @get:Rule
    val timeout: CoroutinesTimeout = CoroutinesTimeout.seconds(1)

    private val coroutine = GlobalScope.launch(CoroutineName("job1")) {
        coroutineContext[Job]!!.join() // hang forever
    }

    @Test
    fun test(): Unit = runBlocking(CoroutineName("job2")) {
        coroutine.join()
    }
}