FA-50344 / Raster clipping / Member archive

Saved clip stack: save alias · case 04

Saving aliases the mutable clip so later in-place intersections corrupt the saved region.

Member previewVariant 4 · 3 implementations · 11 checks per implementation

Case contract

Commands act on finite sample indices [0,size). Save/restore includes the clip-enable bit; region edits update stored coverage even while clipping is disabled. Restore underflow is inert. Draw emits sorted effective samples.

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 0	`[[0, 2], [0, 2]]`	`[[0, 2], [0, 1, 2]]`	Failed

MEMBER ARCHIVE

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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