Bug displaying unicode characters above BMP with "syntax on"

[GoogleCodeExporter]

What steps will reproduce the problem?
Set syntax on (latex for instance) and add a calligraphic A in math mode 
(U+1D49C) between parenthesis, itself and between dollars $(A)$. I use 
EversonMono font.


What is the expected output? What do you see instead?
I expect it to be displayed properly but sometimes, a space is displayed after 
the A, shift the rest of the line up to the $

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")?
Snapshot 73

Please provide any additional information below.

Attached the screenshots of normal buggy display, normal display and syntax off 
display.

Original issue reported on code.google.com by harold.c...@gmail.com on 9 Jan 2015 at 2:09

Attachments:

• bug1.tiff
• bug2.tiff
• bug3.tiff