fix arena_pop

1 files changed, 1 insertions, 1 deletions

diff --git a/qstd/memory.c b/qstd/memory.c
index 87618f9..6db9ad9 100644
--- a/qstd/memory.c
+++ b/qstd/memory.c
@@ -86,7 +86,7 @@ void arena_push(Arena* a) {
 
 void arena_pop(Arena* a) {
 	assert(a->last_push);
-	a->ptr -= a->last_push;
+	a->ptr = a->last_push;
 	a->last_push = *(int*)&a->buf[a->ptr];
 }