From fea68f70698037e3446b14b2c9aae8812a84cf3d Mon Sep 17 00:00:00 2001
From: Matt Corallo <git@bluematt.me>
Date: Thu, 27 Feb 2025 19:32:01 +0000
Subject: [PATCH] Fix Channel being left in indeterminite state from
 9f9a7a92e1c15cad

9f9a7a92e1c15cad13111f7b0b072640edf2b28b introduced some changes
to channel state transitions but left one case where we'd leave a
channel in an undefined phase (upon receiving a `commitment_signed`
in the wrong state), which we fix here.
---
 lightning/src/ln/channel.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lightning/src/ln/channel.rs b/lightning/src/ln/channel.rs
index 01feaf017df..9283bc626f1 100644
--- a/lightning/src/ln/channel.rs
+++ b/lightning/src/ln/channel.rs
@@ -1534,6 +1534,7 @@ impl<SP: Deref> Channel<SP> where
 				res
 			},
 			_ => {
+				self.phase = phase;
 				debug_assert!(!matches!(self.phase, ChannelPhase::Undefined));
 				Err(ChannelError::close("Got a commitment_signed message for an unfunded V1 channel!".into()))
 			}