The mutex solution gives me ``` java.lang.Interrup...
# coroutines
d
The mutex solution gives me
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java.lang.InterruptedException
                                                                                    at kotlinx.coroutines.experimental.BlockingCoroutine.joinBlocking(Builders.kt:227)
                                                                                    at kotlinx.coroutines.experimental.BuildersKt.runBlocking(Builders.kt:153)
Maybe when running multiple times...?