lightningd: fix crash on fixup scan if block unavailable. #8779
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sangbida
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Dec 10, 2025
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sangbida
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Nice find! Could potentially add a debug log here just in case
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```
lightningd: FATAL SIGNAL 11 (version v25.12rc3-1-g498c5b6)
0x5cc2f620ce4c send_backtrace
common/daemon.c:38
0x5cc2f620cee8 crashdump
common/daemon.c:83
0x7e3ac1e4532f ???
./signal/../sysdeps/unix/sysv/linux/x86_64/libc_sigaction.c:0
0x5cc2f615f186 fixup_scan_block
lightningd/chaintopology.c:1531
0x5cc2f615c22c getrawblockbyheight_callback
lightningd/bitcoind.c:484
0x5cc2f61aee87 plugin_response_handle
lightningd/plugin.c:701
0x5cc2f61b4043 plugin_read_json
lightningd/plugin.c:790
0x5cc2f6248d8b next_plan
ccan/ccan/io/io.c:60
0x5cc2f624925c do_plan
ccan/ccan/io/io.c:422
0x5cc2f6249319 io_ready
ccan/ccan/io/io.c:439
0x5cc2f624ad24 io_loop
ccan/ccan/io/poll.c:470
0x5cc2f618381a io_loop_with_timers
lightningd/io_loop_with_timers.c:22
0x5cc2f61892ff main
```
This happens intermittantly on in a few tests:
tests/test_invoices.py::test_invoice_botched_migration
tests/test_pay.py::test_pay_bolt11_metadata
tests/test_runes.py::test_id_migration
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Changelog-Fixed: lightningd: potential crash on startup if bitcoind isn't up-to-date.
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This happens intermittantly on in a few tests:
tests/test_invoices.py::test_invoice_botched_migration tests/test_pay.py::test_pay_bolt11_metadata
tests/test_runes.py::test_id_migration