Cancel existing operation in a watcher before starting a new one #1012
+2
−4
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Thanks to @RolandasRazma for the suggestion in #1011 - this removes the hack needed to make things pass added in #1010.
There's still some pretty significant thread safety issues going on here as pointed out by @cysp, but I think there's a BIG rabbit hole there, and I'd at least like to remove the dirty hack ASAP.