free_list: Update header sizes when coalescing free blocks

1 files changed, 1 insertions, 0 deletions

diff --git a/src/free_list.c b/src/free_list.c
index 0ecb23f..bc93196 100644
--- a/src/free_list.c
+++ b/src/free_list.c
@@ -60,6 +60,7 @@ void fl_coalesce_nodes(free_nd *free_list) {
   for (free_nd *nd = free_list; nd; nd = nd->next) {
     if ((size_t)nd + sizeof(header) + nd->size == (size_t)nd->next) {
       nd->size += sizeof(header) + nd->next->size;
+      ((header *)((void *)nd - sizeof(header)))->size += sizeof(header) + nd->next->size;
       nd->next = nd->next->next;
     }
   }