Error Saving Project With `\b`

[AmazingMech2418]

Expected Behavior

All projects should be able to save.

Actual Behavior

If a project has \b as an input or value stored in a variable, the project won't save, a downloaded copy will fail to load, and an error will show in the console when attempting either of these.

Steps to Reproduce

Create a project with \b in a variable or input for any block and try to save it.

This should be able to be fixed with a minor update to serialization that escapes \b. It seems the JSON.parse function automatically encodes the sequence into a backspace, which results in the error.

[cwillisf]

Thanks for the quality report! I'm curious: how did you find this? :D

[mxmou]

Looks like a duplicate of scratchfoundation/scratch-parser#56 (loading) and scratchfoundation/scratch-www#3497 (saving).

[AmazingMech2418]

Thanks for the quality report! I'm curious: how did you find this? :D

Thank you! I was actually working on a lambda calculus implementation in Scratch, using "\" as the lambda symbol (since the actual lambda isn't on most keyboards), and having a parameter of b led to part of the code being \b.<stuff here>, and I then noticed it wouldn't save, so I looked through the error messages and figured out what the issue was.