FA-99039 / Optimizer update state / Member archive
Resetting optimizer state leaves stale moments · case 04
Resetting optimizer state leaves stale moments.
Case contract
Given [p,m,v,g,reset], reset moments to zero when requested, then apply one SGD-momentum step with mu=.5 and lr=1; return [p_next,m_next,v].
Why this case matters
Optimizer implementations must associate each parameter with its own mathematically specified update state.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| reset clears both | [4.0, 6.0, 12] | [8, 2, 0] | Failed |
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