From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Thu, 11 Mar 2021 11:28:40 +0000 (+0000)
Subject: occult ilks: Fix dispose (!)
X-Git-Tag: otter-0.4.0~187
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=5d23cef71f39c781822dd7d5bae55af19b664665;p=otter.git

occult ilks: Fix dispose (!)

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---

diff --git a/src/occultilks.rs b/src/occultilks.rs
index 81d912b8..02c77023 100644
--- a/src/occultilks.rs
+++ b/src/occultilks.rs
@@ -64,8 +64,12 @@ impl OccultIlks {
 
   pub fn dispose(&mut self, id: OId) {
     let id: Id = id.0;
-    let data = self.table.remove(id).unwrap();
-    self.lookup.remove(&data.k);
+    let data = &mut self.table[id];
+    let newrefcount = data.refcount.checked_sub(1).unwrap();
+    if newrefcount == 0 {
+      let data = self.table.remove(id).unwrap();
+      self.lookup.remove(&data.k);
+    }
   }
 }