From 1c8f1447e784f5fb343c0852ba95464b17694805 Mon Sep 17 00:00:00 2001
From: Max Wash <mbswash@gmail.com>
Date: Mon, 14 Apr 2025 20:13:13 +0100
Subject: [PATCH] mie: fix a nullptr deref in mie_ctx cleanup

---
 mie/builder.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/mie/builder.c b/mie/builder.c
index c54e154..50861f9 100644
--- a/mie/builder.c
+++ b/mie/builder.c
@@ -79,8 +79,10 @@ void mie_ctx_destroy(struct mie_ctx *ctx)
 
 	const size_t nr_types = sizeof ctx->ctx_types / sizeof ctx->ctx_types[0];
 	for (size_t i = 0; i < nr_types; i++) {
-		mie_value_destroy(MIE_VALUE(ctx->ctx_types[i]));
-		ctx->ctx_types[i] = NULL;
+		if (ctx->ctx_types[i]) {
+			mie_value_destroy(MIE_VALUE(ctx->ctx_types[i]));
+			ctx->ctx_types[i] = NULL;
+		}
 	}
 
 	free(ctx);