I don’t know what you’re doing, really, and the fact that you seem to have entirely failed to pick up on what I wrote earlier (above) makes me a bit doubtful that you’re not sending me on a wild goose chase here. You should upgrade to 0.19.5, not 0.19.4, and there really is no way the changes in that version would produce the effects you’re describing here. So check your code, I guess.
I’ve done what you described, however I should mention that the upgrade caused me troubles, not your presented solution.
When my upgrade to 0.19.5 failed, I stayed on 0.19.3 and just coped your syntaxTreeAvailable() to my project and it worked like a charm, just like you suggested.
My question was just regarding the update, I assumed there was some trouble.
In truth, it was my local yarn. After I removed yarn.lock and node_modules/ and reinstalled everything back, everything worked well. So thanks.
Sorry for bothering you with unnecessary dependency problems on my local.