FA-32068 / Keyboard interactions / Member archive
Composition replacement against document revisions: Stale composition replacement overwrites a newer document revision · case 03
The event trace violates the conflict compare rule and produces incorrect keyboard state or command output.
Case contract
Case [document,revision,events]. Events [kind,a,b,text]. Begin captures valid range [a,b) and current revision with preedit text; update replaces pending preedit; external replaces entire document and increments revision. Commit applies pending replacement only if captured revision still equals current, otherwise counts stale conflict; either path closes pending. Cancel discards pending. Return document, revision, pending [lo,hi,base,text] or None, conflicts. 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 |
|---|---|---|---|
| composition-revision scenario 3 | [["nX", 6, null, 0], ["nX", 6, null, 0], ["nX", 6, null, 0]] | [["new", 5, null, 1], ["new", 5, null, 1], ["new", 5, null, 1]] | Failed |
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