Sorry forgot to say that was generated by running strace bzr merge ...
with version 2.3.0, there was no traceback and bzr just said
bzr: ERROR: [Errno 5] Input/output error
Sorry forgot to say that was generated by running strace bzr merge ...
with version 2.3.0, there was no traceback and bzr just said
bzr: ERROR: [Errno 5] Input/output error