From 2755af4d1a162e997ff16a1a9b27288e06fa3ee4 Mon Sep 17 00:00:00 2001
From: Olaf Bergmann <bergmann@tzi.org>
Date: Tue, 23 Aug 2022 10:24:29 +0200
Subject: [PATCH] block.c: Clarify ignored result from coap_get_data()

Addresses CID 1520612.
---
 src/block.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/block.c b/src/block.c
index 5ef01176..f13c97e2 100644
--- a/src/block.c
+++ b/src/block.c
@@ -2061,7 +2061,8 @@ coap_handle_response_get_block(coap_context_t *context,
                   coap_decode_var_bytes(coap_opt_value(size_opt),
                                         coap_opt_length(size_opt)) : 0;
 
-      coap_get_data(rcvd, &length, &data);
+      /* length and data are cleared on error */
+      (void)coap_get_data(rcvd, &length, &data);
       rcvd->body_offset = 0;
       rcvd->body_total = length;
       if (coap_get_block_b(session, rcvd, COAP_OPTION_BLOCK2, &block)) {