Well the good news is that it looks like Skype has not wasted anytime in fixing the issue and have since issued an update that supposedly addresses the problem. According to a statement released by Skype, “We are aware of a problem that was causing Skype clients to crash. Our engineering teams worked hard to resolve this issue, and have released updates for all impacted Skype platforms.”
So if you have yet to update your Skype, you should probably go ahead and get it done now. Prior to this, users who were faced with the crashed had to either wait for the person who sent the message to delete it from their chat history, or downgrade themselves to an older build of Skype which was possible for Windows users but not mobile users, at least not for iOS users.
Hopefully with the latest update the issue has been fixed. This follows a similar bug found on the Messages app for iOS in which when a string of characters is received, it causes the app to crash and reboot. Apple has acknowledged the issue but has yet to issue an update, only providing a temporary workaround for now.