Richard Burnison 8d1a500303 Only use fallback to short IDs when obvious. ...

As reported in #11294, the Docker daemon will execute contains it
shouldn't run in the event that a requested tag is present in an image's
ID. This leads to the wrong image being started up silently.

This change reduces the risk of such a collision by using the short ID
iff the actual revOrTag looks like a short ID (not that it necessarily
is).

Signed-off-by: Richard Burnison <rburnison@ebay.com>

2015-04-10 13:20:44 -04:00

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