Git commit amend empty emails

Git is having empty email problems I think, I'm on git v2.1.3.

Steps to reproduce:

     $ git init
     Initialized empty Git repository in /tmp/test_git/.git/
     $ echo 'test' > abc
     $ git add --all 1 ↵
     $ git commit --message 'test'
     [master (root-commit) 3cc2793] test
      1 file changed, 1 insertion(+)
      create mode 100644 abc
     $ echo 'test2' > abc
     $ git commit --amend
     fatal: Malformed ident string: 'admin <> 1418217345 +0000'