FA-50439 / Raster clipping / Member archive

Transactional clip edit: resize pending · case 04

Resizing resets staged edits before commit.

Member previewVariant 4 · 3 implementations · 14 checks per implementation

Case contract

Begin stages clip edits against a copy. Commit publishes pending coverage atomically; abort discards it. Draw sees committed coverage. Beginning while already editing is ignored; edit outside a transaction is ignored. Resize clips both committed and pending regions.

Why this case matters

Raster clip state can leak coverage across draws even when every individual region is valid.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
explicit sequence 6	`[[0, 1]]`	`[[1]]`	Failed

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