fixes taint garbage collector #1032
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The `finished` observation may not reach a receiver, because of unspecified order in which primus components are executed. E.g. greedy scheduler can intercept `finished` observation and kill a machine. As a result, no taint is ever finalized, which hits any analysis that depends on it. And this PR introduces taint finalization on the `halt` observation, which happens before `finished`.
ivg
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ivg
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The
finishedobservation may not reach a receiver, because of unspecified order in which primus components are executed. E.g. greedy scheduler can interceptfinishedobservation and kill a machine. As a result, no taint is ever finalized, which hits any analysis that depends on it. And this PR introduces taint finalization on thehaltobservation, which happens beforefinished.