What does "#

I am trying to figure out exactly what

#<Object>

means in this Javascript (node.js) error message:

TypeError: Cannot assign to read only property 'toString' of #<Object>

I'm seeing this error in an application log, and it's happening somewhere in a Javascript framework that contains a bunch of code, so I don't know exactly what code or even what file is producing the message. I want to know what the #<Object> syntax refers to in this error message.

Tried Googling, and I see the same syntax in a few other places, but no description of what exactly it's trying to say.

I understand the gist of the error message, I just don't understand the #<Object> part.

via Chad