Opening the lyrics panel on a synced track panicked the main thread
(Recursion detected, i-slint-core properties.rs:583). Root cause: a
changed callback's WATCHED expression is eagerly evaluated at instance
creation, and repeated rows are created from INSIDE the parent layout's
layout-cache binding evaluation - so the active row's changed y/height
handlers read the locked layout-cache and re-entered it. The handlers are
gone: rows report on is-active flips plus a one-shot recenter-epoch bump
(16ms timer per view mount) covering the born-already-active case (panel
opened mid-song); geometry is read only inside notify bodies, where the
lazy pull yields settled post-relayout values. Wrap/resize drift
re-centers on the next line change - Tauri parity (it also only scrolls
on activeLineIndex changes). Footgun documented in the view header.
cc
vicrodh
67a0e39841