broken by Golang 1.13: extracttar error

[onlyjob]

rkt no longer works when built by Golang 1.13: rkt --debug run hangs on image: using image from file {ACI} without printing anything else, apparently due to failure to extract the image.

Under Nomad the following error is logged:

nomad: Error: prepare: error finding images:
   extracttar error: exit status 254, output:
    error extracting tar: could not extract file "rootfs/dev/console" in "/": operation not permitted

There is no such problem when rkt is built by Golang 1.11 (I've confirmed that by re-building rkt by older version of Golang in order to isolate the problem).

Please advise.

[onlyjob]

@tianon, @lucab, @jonboulle, @alban, could you have a look please? Thanks!