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-rw-r--r--Include/setobject.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/Include/setobject.h b/Include/setobject.h
index aa4bb9f..f720a82 100644
--- a/Include/setobject.h
+++ b/Include/setobject.h
@@ -13,6 +13,10 @@ There are three kinds of slots in the table:
1. Unused: key == NULL
2. Active: key != NULL and key != dummy
3. Dummy: key == dummy
+
+Note: .pop() abuses the hash field of an Unused or Dummy slot to
+hold a search finger. The hash field of Unused or Dummy slots has
+no meaning otherwise.
*/
#define PySet_MINSIZE 8