Error if there is no accessibility issue found (my assumption) on the page (Unexpected end of JSON)

[abhishek-net]

I am facing issue while sniffing the accessibility test on "http://www.kiehls.com/ultimate-brushless-shave-cream-blue-eagle/235.html". I was not able to get exact location and error so I modified "dist/accesssniff.js" file by putting few try catch and below error I am receiving for each pages while it is working fine for other domains/sites. Can you investigate the root cause of the error.

SyntaxError: Unexpected end of JSON input
at Object.parse (native)
at ..\node_modules\access-sniff\dist\accesssniff.js:196:40
at Array.every (native)
at Accessibility.parseOutput (..\node_modules\access-sniff\dist\accesssniff.js:192:26)
at ..\node_modules\access-sniff\dist\accesssniff.js:287:28
at ChildProcess.exithandler (child_process.js:195:7)
at emitTwo (events.js:106:13)
at ChildProcess.emit (events.js:191:7)
at maybeClose (internal/child_process.js:886:16)