error: Use of uninitialized value $hash in chomp

From: Andrew Shearer <andrew@terabyte.co.nz>
Date: Dec 19, 2018, 02:42 UTC
Message-ID: <ME1PR01MB11218735004432E3E26C66FFE1BE0@ME1PR01MB1121.ausprd01.prod.outlook.com>

Hello

I am using a "git svn clone" command to extract our project history from svn into git. About 30m into the process it fails with:

r50739 = 2a1491de1353b1e3cce50d8f9d383407218a44f1 (refs/remotes/git-svn) fatal: Cannot open '.git/Git_svn_delta_33316_0_UkxiJV': Permission denied Use of uninitialized value $hash in chomp at C:/Program Files/Git/mingw64/share/perl5/Git.pm line 929, <GEN11> line 36311. hash-object -w --stdin-paths --no-filters: command returned error: 128

error closing pipe: Bad file descriptor at C:/Program Files/Git/mingw64/libexec/git-core\git-svn line 0.
error closing pipe: Bad file descriptor at C:/Program Files/Git/mingw64/libexec/git-core\git-svn line 0.
        (in cleanup)  at /usr/share/perl5/vendor_perl/Error.pm line 198 during global destruction.

I tried updating to the latest build, 2.20.1.windows, but it still fails.

There is nothing particularly special about svn changeset 50739 that I can see compared to any other. Anyone know why this might be failing or how I could resolve it?

Thanks Andrew