native: fix non-zeroed initialization

When we initialize an slist but it's meant to be empty,
it might not be zero-allocated and thus recognize it's null.
Therefore, explicitly zero-initialize jurl_cleanup->slist.

1 files changed, 11 insertions, 0 deletions

diff --git a/src/cleanup.c b/src/cleanup.c
index abc55b7..f47c374 100644
--- a/src/cleanup.c
+++ b/src/cleanup.c
@@ -18,6 +18,17 @@ void jurl_do_cleanup(struct jurl_cleanup **src) {
 
 struct jurl_cleanup *register_cleanup(struct jurl_cleanup **prev, enum jurl_cleanup_type type) {
 	struct jurl_cleanup *out = malloc(sizeof(struct jurl_cleanup));
+
+	switch (type) {
+		case JURL_CLEANUP_TYPE_SLIST:
+			out->slist = NULL; // we malloced
+			break;
+		default:
+			free(out);
+			janet_panic("unknown cleanup type in register_cleanup");
+			return NULL;
+	}
+
 	out->next = *prev;
 	*prev = out;
 	out->type = type;