6554 - snapshot: error on use of a clobbered var

When looking up a var, ensure that it's the var most recently written to
its register.

The new test passes, but a handful of tests now start failing when a new
var in register X is initialized based on the old var in register X. The
way we do lookups is not quite right. At the moment we perform lookups
when we parse words. So we look up outputs of a statement before inputs.
But old bindings are still valid for the entirety of a statement, and outputs
should only take effect for the next statement.

0 files changed, 0 insertions, 0 deletions