Dmitry Vyukov 3558653771 vm: properly detect when a program exits
syz-fuzzer never exits (normally) so this does not affect syz-manager.
But during reproduction we can run a short running program (no repeat mode)
and currently VMs treat premature exit as an error.

Properly detect when a program exits and let callers decide what to do with it.
2017-02-02 20:23:40 +01:00
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