xpay: simple_feasibleflow: Assertion `amount > 0' failed.

[michael1011]

When trying to pay an invoice with xpay, the node crashes with this stack trace:

Jan 19 13:18:52 boltz lightningd[2259911]: cln-askrene: plugins/askrene/algorithm.c:274: simple_feasibleflow: Assertion `amount > 0' failed.
Jan 19 13:18:52 boltz lightningd[2259911]: cln-askrene: FATAL SIGNAL 6 (version v24.11.1-1-ge9dbdeb)
Jan 19 13:18:52 boltz lightningd[2259911]: 0x5576e212b407 send_backtrace
Jan 19 13:18:52 boltz lightningd[2259911]:         common/daemon.c:33
Jan 19 13:18:52 boltz lightningd[2259911]: 0x5576e212b49e crashdump
Jan 19 13:18:52 boltz lightningd[2259911]:         common/daemon.c:75
Jan 19 13:18:52 boltz lightningd[2259911]: 0x7f964ba9251f ???
Jan 19 13:18:52 boltz lightningd[2259911]:         ???:0
Jan 19 13:18:52 boltz lightningd[2259911]: 0x7f964bae69fc ???
Jan 19 13:18:52 boltz lightningd[2259911]:         ???:0
Jan 19 13:18:52 boltz lightningd[2259911]: 0x7f964ba92475 ???
Jan 19 13:18:52 boltz lightningd[2259911]:         ???:0
Jan 19 13:18:52 boltz lightningd[2259911]: 0x7f964ba787f2 ???
Jan 19 13:18:52 boltz lightningd[2259911]:         ???:0
Jan 19 13:18:52 boltz lightningd[2259911]: 0x7f964ba7871a ???
Jan 19 13:18:52 boltz lightningd[2259911]:         ???:0
Jan 19 13:18:52 boltz lightningd[2259911]: 0x7f964ba89e95 ???
Jan 19 13:18:52 boltz lightningd[2259911]:         ???:0
Jan 19 13:18:52 boltz lightningd[2259911]: 0x5576e211695e simple_feasibleflow
Jan 19 13:18:52 boltz lightningd[2259911]:         plugins/askrene/algorithm.c:274
Jan 19 13:18:52 boltz lightningd[2259911]: 0x5576e2111495 minflow
Jan 19 13:18:52 boltz lightningd[2259911]:         plugins/askrene/mcf.c:1014
Jan 19 13:18:52 boltz lightningd[2259911]: 0x5576e210bc74 get_routes
Jan 19 13:18:52 boltz lightningd[2259911]:         plugins/askrene/askrene.c:414
Jan 19 13:18:52 boltz lightningd[2259911]: 0x5576e210c610 do_getroutes
Jan 19 13:18:52 boltz lightningd[2259911]:         plugins/askrene/askrene.c:615
Jan 19 13:18:52 boltz lightningd[2259911]: 0x5576e210cad8 listpeerchannels_done
Jan 19 13:18:52 boltz lightningd[2259911]:         plugins/askrene/askrene.c:741
Jan 19 13:18:52 boltz lightningd[2259911]: 0x5576e211b35a handle_rpc_reply
Jan 19 13:18:52 boltz lightningd[2259911]:         plugins/libplugin.c:1084
Jan 19 13:18:52 boltz lightningd[2259911]: 0x5576e211b54c rpc_read_response_one
Jan 19 13:18:52 boltz lightningd[2259911]:         plugins/libplugin.c:1388
Jan 19 13:18:52 boltz lightningd[2259911]: 0x5576e211b5fd rpc_conn_read_response
Jan 19 13:18:52 boltz lightningd[2259911]:         plugins/libplugin.c:1412
Jan 19 13:18:52 boltz lightningd[2259911]: 0x5576e214fe8f next_plan
Jan 19 13:18:52 boltz lightningd[2259911]:         ccan/ccan/io/io.c:60
Jan 19 13:18:52 boltz lightningd[2259911]: 0x5576e215036e do_plan
Jan 19 13:18:52 boltz lightningd[2259911]:         ccan/ccan/io/io.c:422
Jan 19 13:18:52 boltz lightningd[2259911]: 0x5576e215042b io_ready
Jan 19 13:18:52 boltz lightningd[2259911]:         ccan/ccan/io/io.c:439
Jan 19 13:18:52 boltz lightningd[2259911]: 0x5576e2151e2e io_loop
Jan 19 13:18:52 boltz lightningd[2259911]:         ccan/ccan/io/poll.c:455
Jan 19 13:18:52 boltz lightningd[2259911]: 0x5576e211cc29 plugin_main
Jan 19 13:18:52 boltz lightningd[2259911]:         plugins/libplugin.c:2488
Jan 19 13:18:52 boltz lightningd[2259911]: 0x5576e210cb38 main
Jan 19 13:18:52 boltz lightningd[2259911]:         plugins/askrene/askrene.c:1262
Jan 19 13:18:52 boltz lightningd[2259911]: 0x7f964ba79d8f ???
Jan 19 13:18:52 boltz lightningd[2259911]:         ???:0
Jan 19 13:18:52 boltz lightningd[2259911]: 0x7f964ba79e3f ???
Jan 19 13:18:52 boltz lightningd[2259911]:         ???:0
Jan 19 13:18:52 boltz lightningd[2259911]: 0x5576e21098c4 ???
Jan 19 13:18:52 boltz lightningd[2259911]:         ???:0
Jan 19 13:18:52 boltz lightningd[2259911]: 0xffffffffffffffff ???
Jan 19 13:18:52 boltz lightningd[2259911]:         ???:0
Jan 19 13:18:52 boltz lightningd[2259911]: cln-askrene: FATAL SIGNAL 11 (version v24.11.1-1-ge9dbdeb)
Jan 19 13:18:52 boltz lightningd[2259911]: 0x5576e212b407 send_backtrace
Jan 19 13:18:52 boltz lightningd[2259911]:         common/daemon.c:33
Jan 19 13:18:52 boltz lightningd[2259911]: 0x5576e212b49e crashdump
Jan 19 13:18:52 boltz lightningd[2259911]:         common/daemon.c:75
Jan 19 13:18:52 boltz lightningd[2259911]: 0x7f964ba9251f ???
Jan 19 13:18:52 boltz lightningd[2259911]:         ???:0
Jan 19 13:18:52 boltz lightningd[2259911]: 0x0 ???
Jan 19 13:18:52 boltz lightningd[2259911]:         ???:0