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-rw-r--r--lib/http2.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/http2.c b/lib/http2.c
index 1484e1515..6720984b0 100644
--- a/lib/http2.c
+++ b/lib/http2.c
@@ -2054,7 +2054,8 @@ CURLcode Curl_http2_switched(struct connectdata *conn,
" after upgrade: len=%zu\n",
nread);
- memcpy(httpc->inbuf, mem, nread);
+ if(nread)
+ memcpy(httpc->inbuf, mem, nread);
httpc->inbuflen = nread;
nproc = nghttp2_session_mem_recv(httpc->h2, (const uint8_t *)httpc->inbuf,