rpc: fix crash 'listforwards' when payment_hash is empty

```
2019-08-14T17:50:39.100Z **BROKEN** lightningd(11355): FATAL SIGNAL 11 (version v0.7.2rc1)
2019-08-14T17:50:39.100Z **BROKEN** lightningd(11355): backtrace: common/daemon.c:45 (send_backtrace) 0x563349d07879
2019-08-14T17:50:39.100Z **BROKEN** lightningd(11355): backtrace: common/daemon.c:53 (crashdump) 0x563349d078c9
2019-08-14T17:50:39.100Z **BROKEN** lightningd(11355): backtrace: (null):0 ((null)) 0x7efd7b996f1f
2019-08-14T17:50:39.100Z **BROKEN** lightningd(11355): backtrace: ccan/ccan/str/hex/hex.c:59 (hex_encode) 0x563349d57fec
2019-08-14T17:50:39.100Z **BROKEN** lightningd(11355): backtrace: lightningd/json.c:380 (json_add_hex) 0x563349cd9dd3
2019-08-14T17:50:39.100Z **BROKEN** lightningd(11355): backtrace: lightningd/peer_htlcs.c:2151 (json_format_forwarding_object) 0x563349cfa7ac
2019-08-14T17:50:39.100Z **BROKEN** lightningd(11355): backtrace: lightningd/peer_htlcs.c:2198 (listforwardings_add_forwardings) 0x563349cfa99d
2019-08-14T17:50:39.100Z **BROKEN** lightningd(11355): backtrace: lightningd/peer_htlcs.c:2216 (json_listforwards) 0x563349cfaa55
2019-08-14T17:50:39.100Z **BROKEN** lightningd(11355): backtrace: lightningd/jsonrpc.c:650 (parse_request) 0x563349cdc184
2019-08-14T17:50:39.100Z **BROKEN** lightningd(11355): backtrace: lightningd/jsonrpc.c:748 (read_json) 0x563349cdc5ae
2019-08-14T17:50:39.100Z **BROKEN** lightningd(11355): backtrace: ccan/ccan/io/io.c:59 (next_plan) 0x563349d4bbe5
2019-08-14T17:50:39.100Z **BROKEN** lightningd(11355): backtrace: ccan/ccan/io/io.c:407 (do_plan) 0x563349d4c762
2019-08-14T17:50:39.101Z **BROKEN** lightningd(11355): backtrace: ccan/ccan/io/io.c:417 (io_ready) 0x563349d4c7a0
2019-08-14T17:50:39.101Z **BROKEN** lightningd(11355): backtrace: ccan/ccan/io/poll.c:445 (io_loop) 0x563349d4e7f5
2019-08-14T17:50:39.101Z **BROKEN** lightningd(11355): backtrace: lightningd/io_loop_with_timers.c:24 (io_loop_with_timers) 0x563349cd8afe
2019-08-14T17:50:39.101Z **BROKEN** lightningd(11355): backtrace: lightningd/lightningd.c:834 (main) 0x563349cded3a
2019-08-14T17:50:39.101Z **BROKEN** lightningd(11355): backtrace: (null):0 ((null)) 0x7efd7b979b96
2019-08-14T17:50:39.101Z **BROKEN** lightningd(11355): backtrace: (null):0 ((null)) 0x563349cc5909
2019-08-14T17:50:39.101Z **BROKEN** lightningd(11355): backtrace: (null):0 ((null)) 0xffffffffffffffff
```

[ Modified to simply omit field --RR ]
This commit is contained in:
lisa neigut 2019-08-14 13:05:51 -05:00 committed by Rusty Russell
parent 58fb1528dd
commit 802ebe768c

View File

@ -2148,9 +2148,11 @@ void json_format_forwarding_object(struct json_stream *response,
{
json_object_start(response, fieldname);
json_add_hex(response, "payment_hash",
cur->payment_hash,
sizeof(*cur->payment_hash));
/* See 6d333f16cc0f3aac7097269bf0985b5fa06d59b4 */
if (cur->payment_hash)
json_add_hex(response, "payment_hash",
cur->payment_hash,
sizeof(*cur->payment_hash));
json_add_short_channel_id(response, "in_channel", &cur->channel_in);
json_add_short_channel_id(response, "out_channel", &cur->channel_out);
json_add_amount_msat_compat(response,