This should fix #19 or at least improve the error message a bit.
@saimn could try this out? I don't had the experience of a failing dfs_update_header() so far.
Coverage remained the same at 77.755% when pulling 99f2d8a4966c2f8894a25df8134c8710d9ee4758 on dfs_error_message into 839d2caa727c101cf87b3242cc2555bf25dd6798 on master.
This should fix #19 or at least improve the error message a bit. @saimn could try this out? I don't had the experience of a failing
dfs_update_header()
so far.