⚫ How The Black Point Message Crashes Android Apps
"_If you touch the????black point then your whatsapp will hang_", says the message that's being sent around, and it's right. It's a text rendering bug, the same as many others -- which isn't interesting. But the characters it's using, Unicode RTL and LTR marks, are worth knowing about.
Thanks to everyone who suggested this subject!
The Unicode Bidirectional Algorithm: http://unicode.org/reports/tr9/
I'm at http://tomscott.com
on Twitter at http://twitter.com/tomscott
on Facebook at http://facebook.com/tomscott
and on Snapchat and Instagram as tomscottgo