mask and tint throwing errors in the live editor with PJS programs

[grantjenkins]

Approx. two months ago mask and tint started throwing errors in PJS programs. Issue was with existing projects that were originally working fine, and any new projects.

Error message for mask is: __env__.img.mask is not a function
Error message for tint is: Cannot read property '0' of undefined

A lot of KA users have mentioned that they've logged the issue with KA support, but I haven't heard anything more about it, and issue persists. Just wondering if this has been logged in your internal issue tracker, and any status update?

My KA username is grantjenkins.

[MatthiasPortzel]

I was going to report this, but at the time the bug first appeared, this repository hadn’t had any recent commits. Additionally, when I went to bisect the bug, the minimum reproduction case I was using showed issues in year-old builds.

For these reasons, an internal change to the build process is a very possible culprit.

If anyone has a reproduction case of a program that was confirmed to work before this change, and is now broken (I know such programs exist), sharing would be appreciated.

[grantjenkins]

Hi Matthias - this was one of my programs that was working fine, then was just broken.
https://www.khanacademy.org/computer-programming/cat-in-a-storm-animated/5165045920251904

Note that I've put /* jshint ignore: start */ on line 50 to get around the issue temporarily. If you remove that it'll get the original error.

Another one that got the error (was working fine before):
https://www.khanacademy.org/computer-programming/rover-game/6053666578055168

/* jshint ignore: start */ on line 33 for that one.

For tint I get a separate error (see updated initial message with both error messages). See simple code snippet below that will generate the error.

var img = getImage("avatars/robot_male_3");
image(img, 0, 0);
tint(10, 10, 10, 200);