Failing testcase for sync setSelf bug

[mdlavin]

Even after the new 0.2.0 release including a fix for #774 I'm still seeing a problem with a synchronous setSelf call not taking effect immediately. I've narrowed it down to a fairly small testcase that demonstrates the problem.

There are two code tweaks you can make to the testcase that will cause it to pass, and they might highlight where the underlying bug is:

1. If you remove the async modifier here the test passes
2. If you flip the order of the dependencies here, then the test passes

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[drarmstr]

@csantos42 - Think this is related to #998?