Check if backend is valid during shutdown

frenetic-lang / pyretic

The Pyretic language and runtime system

http://frenetic-lang.org/pyretic/

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Closed JamesGuthrie closed 9 years ago

JamesGuthrie commented 9 years ago

In frontend-only mode the backend is initialized to None, so calling its kill() member function fails.

Fixes frenetic-lang/pyretic#31.

Signed-off-by: James Guthrie james@prodigi.ch

joshreich commented 9 years ago

Seems obviously correct, am merging w/o testing