tree 0b81a4f54ebb3c37a39c272b28ebdb069a203c5a
parent a4708521d495ae3c9086a38e6241aa984953f684
author Barret Rhoden <brho@cs.berkeley.edu> 1570041050 -0400
committer Barret Rhoden <brho@cs.berkeley.edu> 1570569071 -0400

arena: check for imports when destroying

This catches bugs where we tear down an arena while other arenas or
slabs still depend on it.  It's the equivalent of a use-after-free.

Signed-off-by: Barret Rhoden <brho@cs.berkeley.edu>