{"id":"btree-free-page-no-parent-fixup","text":"`PageManager.free_page` adds a page to the free list without removing the parent's downlink to it, creating a dangling-pointer risk on crash","truth_value":"IN","source":"entries/2026/05/29/topic-postgres-nbtree-half-dead-state-machine.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"btree-free-page-no-parent-fixup","truth_value":"IN","reason":"premise"}]}}