UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.84 Safari/537.36

Steps to reproduce the problem:
I see lots of these on the xterm console:

What is the expected behavior?

What went wrong?
4123:4123:0127/092426.879216:ERROR:CONSOLE(1)] "Uncaught (in promise) SyntaxError: Unexpected identifier", source: chrome-devtools://devtools/bundled/inspector.html?remoteBase=https://chrome-devtools-frontend.appspot.com/serve_file/@0f53a5abc7a405fbe9f1cfd3db38f2092c8a7816/&can_dock=true&dockSide=undocked (1)

Did this work before? N/A 

Chrome version: 63.0.3239.84  Channel: n/a
OS Version: 
Flash Version: