disposeDirectory called a createRoot dispose() synchronously. When
triggered by pinForOwner's onCleanup during a parent remount (e.g.
switching to a WSL server re-keys the ServerKey Show), the inner
dispose ran a nested cleanNode cascade on a sibling root while the
outer cascade was mid-traversal, corrupting solid-js's graph walk
state and surfacing as TypeError: Cannot read properties of null
(reading '1') at chunk-*.js:992 after ~155 recursive cleanNode frames.
Queue the dispose on a microtask so synchronous bookkeeping still
runs (map deletes, onDispose cache invalidation) but the reactive
cleanup happens after the outer traversal finishes.
LukeParkerDev
d04d13ea22