[Help-librejs] Question about this message "Error: already being checked."

[Nik Nyby]

Hi, I'm confused about what this error message means:

    error parsing: Error: already being checked.

This error is appearing for me on an unminified jquery-1.10.2
file. Anyone know what this is referring to? I looked at the LibreJS
source where this is used and it's not obvious to me when this would
occur.

Thanks,
Nik