VULNERABILITY DETAILS
Chrome doesn't show any security warning when homograph symbols "ḳ" (1E33), "ṇ"(1E47), "ḅ" (1E05) are used in URL.
Punycode also is not shown. 
This can be used for phishing attacks. 

Example: facebooḳ.com (notice "K with dot" at the end), caṇon.com (notice n with dot in the middle).

VERSION
Chrome Version: tested on latest desktop and mobile
Operating System: Windows 10, Android 6.0.1

REPRODUCTION CASE
copy and paste those URL in a brower.
facebooḳ.com, caṇon.com

Notice that no punycode is shown.

ADDITIONAL VECTOR
No Gmail warning is shown when user receives email from that domains. This can be used for phishing.