Print <-- Current Pitch does not Concat with Text String when inside a Note

[pikurasa]

Perhaps this issue is related to #2935 , however #2938 does not fix it.

If you have Print <-- Current Pitch and concatenate a text string, the program fails completely.

Interestingly, the issue only occurs with the Print <-- Current Pitch block is inside of a note. Outside of a note, it works.

Uncaught TypeError: Cannot read property 'toString' of undefined
    at Function.doPlus (mathutils.js:160)
    at PlusBlock.arg (NumberBlocks.js:710)
    at Logo.parseArg (logo.js:833)
    at Logo.runFromBlockNow (logo.js:1546)
    at logo.js:1504

Test File
Concat-broken.html.zip

[daksh4469]

I tried fixing this by adding a check for undefined arguments in the doPlus method and it worked. The end result is shown in the video below.

concat.mp4

Can you please confirm if this is the desired behavior? @pikurasa
Thanks.

[walterbender]

fixed as part of ae7ce91

[daksh4469]

I think this issue still persists. I have a possible fix (#2946) for this but was waiting for confirmation on my earlier comment.
Please review the patch @walterbender.
Thanks.