MacVim crashes when displaying a certain character

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What steps will reproduce the problem?
MacVim crashes when displaying the following character:
𻯩
I apologize for putting the character here like this, but I couldn't find out 
what kind of character this is.

What is the expected output? What do you see instead?
MacVim shouldn't crash, ever

What version of MacVim and OS X are you using (see "MacVim->About MacVim"
and  "Apple Menu->About This Mac" menu items, e.g. "Snapshot 40, 10.5.6
Intel")?
MacVim 73, OSX 10.10.1

Additional notes:
Terminal vim does not crash when displaying the same character.

Original issue reported on code.google.com by floris.v...@gmail.com on 12 Jan 2015 at 11:34