From e0cf80d666d4b5df3229f030a16d10d21323508e Mon Sep 17 00:00:00 2001
From: Peter Zhu <peter@peterzhu.ca>
Date: Wed, 15 Mar 2023 17:40:50 -0400
Subject: Fix incorrect size of WeakMap buffer

In wmap_final_func, j is the number of elements + 1 (since j also
includes the length at the 0th index), so we should resize the buffer
to size j and the new length is j - 1.
---
 weakmap.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/weakmap.c b/weakmap.c
index 1e86f22988..3a615d6868 100644
--- a/weakmap.c
+++ b/weakmap.c
@@ -163,8 +163,8 @@ wmap_final_func(st_data_t *key, st_data_t *value, st_data_t arg, int existing)
         return ST_DELETE;
     }
     if (j < i) {
-        SIZED_REALLOC_N(ptr, VALUE, j + 1, i);
-        ptr[0] = j;
+        SIZED_REALLOC_N(ptr, VALUE, j, i);
+        ptr[0] = j - 1;
         *value = (st_data_t)ptr;
     }
     return ST_CONTINUE;
-- 
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