1 files changed, 3 insertions, 0 deletions
diff --git a/src/lower.c b/src/lower.c
index 4b57a90..02efb1b 100644
--- a/src/lower.c
+++ b/src/lower.c
@@ -738,6 +738,9 @@ int lower_ast(struct ast *tree)
 static void destroy_fn(struct fn *f)
 {
 	vec_destroy(&f->insns);
+
+	/* filled in by JIT, but struct fn is still under the jurisdiction of
+	 * lower.c so free arena here */
 	if (f->arena)
 		munmap(f->arena, f->size);
 }