A student of mine is getting a crash, I've narrowed it down to calling fill when the pen location is at (or within 1 pixel of?) the edge of the stage.
Ironically, when the Brave-browser tab crashes, it says 'Aw Snap!' (even with the exclamation point!)
i confirm the crash in chrome too...(at -181)
Same here.
it says "Aw, Snap!" for me too!
If you remove the block making the shape, it doesn't crash.
This project doesn't seem to crash, however
https://snap.berkeley.edu/snap/snap.html#present:Username=legoman3.14&ProjectName=fill_crash&editMode&noRun
Interesting, in the end it's like the same circle-drawing except with turn and move instead of go to
also if I don't run the script it doesn't crash 
When I run it, it stops at -181, then my browser starts saying "This page is slowing down firefox.". But it doesn't say "Aw Snap!"
"Aw Snap!" is probably a Chromium/Chrome/Brave error
also, my student can't just switch to a different implementation of a circle, his project is actually drawing a toothed gear, not just a circle
Actually, in firefox, it will display a fullscreen error if it does crash.
Also, I tried reproducing by bringing a filled square onto the screen, that didn't work (that is to say, it did work, it did not reproduce the crash)
draw a square around the screen before drawing the circle !
https://snap.berkeley.edu/project?user=loucheman&project=forum%20help%20-%20fill_crash
I was just trying to see if it was a general problem for filling on the edge of he stage, or just with that block.
Yes, an interesting test. Curious why one method of drawing a 'circle' has this fill problem and another does not. Seems like the actual pixels drawn that need to be filled could be identical either way.
Hey cool thanks, a 1pix box around the frame is a pretty good workaround!
I will recommend that to my student.
(Also check it out, this is forum post number 8999 -- so close!)
But why would the fill function be invalid, privileged or ill-formed..?
I slightly modified the script to add another test: if you pull the draw/fill out of the loop and do it specifically for y=-181 only, it does not crash.