FA-32233 / Keyboard interactions / Member archive
Keyboard matrix rectangle ghost quarantine: Matrix keyboard presses include released or unchanged accepted cells · case 03
The event trace violates the press delta rule and produces incorrect keyboard state or command output.
Case contract
Case [rows,columns,reports]. Reports contain [row,column] cells. Ignore out-of-bounds coordinates. Any full observed rectangle with two distinct rows and columns makes its four corners ambiguous. Newly ambiguous presses are quarantined, but already accepted cells remain held while still observed. Emit sorted release edges then sorted press edges for each report. Return edges, accepted cells and final quarantined cells. Inputs are finite ordered event traces; return the stated deterministic state. Batch entries are independent. N varies the number of independent input transactions.
Why this case matters
Controlled keyboard event processing model for debugging application event logic.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| matrix-ghost-quarantine scenario 1 | [[[], [[0, 0], [0, 1], [1, 0]], []], [[], [[0, 0], [0, 1], [1, 0]], []], [[], [[0, 0], [0, 1], [1, 0]], []]] | [[[["down", 0, 0], ["down", 0, 1], ["down", 1, 0]], [[0, 0], [0, 1], [1, 0]], []], [[["down", 0, 0], ["down", 0, 1], ["down", 1, 0]], [[0, 0], [0, 1], [1, 0]], []], [[["down", 0, 0], ["down", 0, 1], ["down", 1, 0]], [[0, 0], [0, 1], [1, 0]], []]] | Failed |
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