FA-11838 / Document structure integrity / Member archive

A cell is placed into a column occupied by a previous row span · case 03

A cell is placed into a column occupied by a previous row span in the controlled document model.

Member previewVariant 3 · 3 implementations · 6 checks per implementation

Case contract

Rows contain positive row-span lengths for unit-width cells. Place each row cell into the first free column at or after the preceding cell; previous spans occupy their columns for exactly their span rows.

Why this case matters

Structured editing must preserve document semantics independently of visual rendering.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
document fixture 0	`[[0], [0], [0]]`	`[[0], [1], [0]]`	Failed

MEMBER ARCHIVE

The complete case is available to members.

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

Member access is invitation-based. Sign in with your invited account to inspect the sources.