Flickering boolean ops

[jneem]

The attached example contains (triangle minus triangle) xor triangle. When I drag the last triangle around, the result "flickers", and most of the time it seems to not be correctly computing the xor. I added some debug prints to the boolean ops (specifically, around the calls to path_bool::path_boolean and they all seem to be correct. This happens on both firefox and chromium (and in chromium it happens both with and without vello), on a recent master (fd0addf, to be precise).

Here's a little video showing the flicker, and I've attached the input file below.

graphite-flicker.mp4

flicker.graphite.txt

[Keavon]

Thanks. And to confirm, you're saying this happens in both master and your Linesweeper branch?

[jneem]

That's right; I first noticed it on the linesweeper branch, but this video is from a recent master (and the observed behavior is identical for both).