From 28e8f025258d346851ce4b7b7f86485b2ee7828a Mon Sep 17 00:00:00 2001
From: David Garske <david@wolfssl.com>
Date: Mon, 26 Jul 2021 09:56:29 -0700
Subject: [PATCH] Fix for `wc_ecc_ctx_free` and heap hint. Fixes #4246.

---
 wolfcrypt/src/ecc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/wolfcrypt/src/ecc.c b/wolfcrypt/src/ecc.c
index 83256a893..2e7069317 100644
--- a/wolfcrypt/src/ecc.c
+++ b/wolfcrypt/src/ecc.c
@@ -11171,8 +11171,10 @@ ecEncCtx* wc_ecc_ctx_new(int flags, WC_RNG* rng)
 void wc_ecc_ctx_free(ecEncCtx* ctx)
 {
     if (ctx) {
+        void* heap = ctx->heap;
         ForceZero(ctx, sizeof(ecEncCtx));
-        XFREE(ctx, ctx->heap, DYNAMIC_TYPE_ECC);
+        XFREE(ctx, heap, DYNAMIC_TYPE_ECC);
+        (void)heap;
     }
 }