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Hi, is there a reason why I am seeing multiple `CancellationException` s related to coroutines? First, there is `kotlin.coroutines.cancellation.CancellationException`, which is part of `kotlin-stdlib:1.6.21` and there is also `kotlinx.coroutines.CancellationException` which comes from `kotlinx-coroutines-core-jvm:1.6.1`. I can see that they are both just typealiases for `java.util.concurrent.CancellationException` so in the end it doesn’t matter, but it tends to cause mess in the code.

Can’t tell you for sure, but it looks like backwards compatibility.
The `CancellationException` from kotlinx-coroutines has been present for a long time (before Kotlin 1.4). The `CancellationException` in stdlib has only been there since Kotlin 1.4.
In the current versions of kotlinx-coroutines the `CancellationException` is actually a typealias for the one in stdlib. So effectively there is no difference between the two.