Unexpected end of JSON input error

[jwshii]

Some expressions result in the following error:

SyntaxError: Unexpected end of JSON input at JSON.parse (<anonymous>) at jQuery.parseJSON (https://code.jquery.com/jquery-1.12.4.js:9011:22) at ajaxConvert (https://code.jquery.com/jquery-1.12.4.js:9335:19) at done (https://code.jquery.com/jquery-1.12.4.js:9789:15) at XMLHttpRequest.callback (https://code.jquery.com/jquery-1.12.4.js:10311:8).

An example of such an expression is A(i,j,k,l) = B(i,j,k,l) + C(i,j,k,l) where all the tensors are in CSF.

Possible source of this issue is that the generated text is too long, so it gets cut off partway through a function.