(One clue is it doesn't seem to trigger until the shape becomes convex, which is afaik the only time that NanoVG engages the stencil buffer, so perhaps something to do with that!) > On Oct 8, 2022, at 4:37 PM, Luke Iannini <****************> wrote: > > Always!! Ok it took a few tries but I got a repro here, will check it out! (It's very pretty) > >> On Oct 8, 2022, at 4:11 PM, Bret Victor <****************> wrote: >> >> Should you happen to be in the mood to track down a memory corruption bug (?). (Not urgent, just weird.) >> >> 1. Restart Realtalk and put down page 41472. You should see a solid yellow animated shape. (The red in the photo is just a photo artifact.) >> >> <IMG_0469.jpeg> >> >> 2. Put down an appearance recognizer, then put it away. >> >> 3. The yellow shape has turned into yellow glitch art, filling the bounding box of the shape. This only happens with fill, not stroke. >> >> <IMG_0470.jpeg> >> >> >> >