Preserve type aliases in match | null refinement#19745

Open

T-Gro wants to merge 3 commits into

mainfrom

fix/nullness-dropping-alias

Commits on May 14, 2026

Add failing TDD tests for issue #19646 (alias dropped after | null pattern)

T-Gro
and
Copilot
committed
Fix #19646: preserve type aliases in match | null refinement

T-Gro
and
Copilot
committed

Commits on May 15, 2026

Collapse Issue 19646 tests into a Theory

T-Gro
and
Copilot
committed