amiize: more carefully clean up resources before retries #804
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This adds a cleanup step before each point where we retry the amiization from
scratch. It also adds cleanup of the root and data snapshot on failure, since
most of the time this wouldn't be used and would sit forever.
Fixes #755.
Testing done:
I ran it fully to see it succeed, then started inserting
false
commands beforecheck_return
calls to check the retry and cleanup behavior. I tried for a couple different single continue statements, and a couple differentcontinue 2
for the loops. In each case it did the cleanup and retries correctly.