Index: devel/libuv/files/patch-src_unix_udp.c
===================================================================
--- devel/libuv/files/patch-src_unix_udp.c	(nonexistent)
+++ devel/libuv/files/patch-src_unix_udp.c	(working copy)
@@ -0,0 +1,31 @@
+--- src/unix/udp.c.orig	2020-04-15 16:31:21 UTC
++++ src/unix/udp.c
+@@ -214,11 +214,14 @@ static int uv__udp_recvmmsg(uv_udp_t* handle, uv_buf_t
+     else
+       handle->recv_cb(handle, UV__ERR(errno), buf, NULL, 0);
+   } else {
+-    /* pass each chunk to the application */
+-    for (k = 0; k < (size_t) nread && handle->recv_cb != NULL; k++) {
+-      flags = UV_UDP_MMSG_CHUNK;
++    /* count to zero, so the buffer base comes last */
++    for (k = nread; k > 0 && handle->recv_cb != NULL;) {
++      k--;
++      flags = 0;
+       if (msgs[k].msg_hdr.msg_flags & MSG_TRUNC)
+         flags |= UV_UDP_PARTIAL;
++      if (k != 0)
++        flags |= UV_UDP_MMSG_CHUNK;
+ 
+       chunk_buf = uv_buf_init(iov[k].iov_base, iov[k].iov_len);
+       handle->recv_cb(handle,
+@@ -227,10 +230,6 @@ static int uv__udp_recvmmsg(uv_udp_t* handle, uv_buf_t
+                       msgs[k].msg_hdr.msg_name,
+                       flags);
+     }
+-
+-    /* one last callback so the original buffer is freed */
+-    if (handle->recv_cb != NULL)
+-      handle->recv_cb(handle, 0, buf, NULL, 0);
+   }
+   return nread;
+ }