[[!comment format=mdwn
 username="joey"
 subject="""comment 1"""
 date="2016-02-14T19:19:46Z"
 content="""
Reproduced using LANG=C.

This is a problem with the filename stored in the keys db. In the first
repo, it has:

	VALUES(1,'SHA256E-s8--d1d0c59000f7c0d71485b051c9ca3f25f7afa84f0be5fea98fe1e12f3f898f44','test_öüä');

However, in the clone:

	VALUES(1,'SHA256E-s8--d1d0c59000f7c0d71485b051c9ca3f25f7afa84f0be5fea98fe1e12f3f898f44','test_������');

So, it's lost the correct filename there. Since it doesn't
find the file with the messed up name, it doesn't replace the file content.

The problem is not with decoding git's C-style character encoding; that
happens ok yielding `"test_\56515\56502\56515\56508\56515\56484"`. 
But, that does not seem to get stored in the database correctly.

Seems that these unicode surrigates are not handled by the sqlite layer.
The surrigates are being used because LANG=C does not support
unicode. This could also happen when in a (working) utf-8 locale, when
the filename is not utf-8 encoded.

So, need to escape strings containing such surrigates before passing to
SQL. In a backwards-compatible way. Done.
"""]]