From 37f26dc430e5922c0be1292b5a38b62af58c28af Mon Sep 17 00:00:00 2001
From: Ginger <ginger@gingershaped.computer>
Date: Thu, 28 May 2026 10:23:31 -0400
Subject: [PATCH] fix: Panic when trying to check an unknown UIAA stage type

---
 src/service/uiaa/mod.rs | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/service/uiaa/mod.rs b/src/service/uiaa/mod.rs
index 26bda24b5..2bb70c152 100644
--- a/src/service/uiaa/mod.rs
+++ b/src/service/uiaa/mod.rs
@@ -584,10 +584,12 @@ impl Service {
 					}
 				},
 				| AuthData::Terms(_) => Ok(AuthType::Terms),
-				| _ => Err(StandardErrorBody::new(
-					ErrorKind::Unrecognized,
-					"Unsupported stage type".into(),
-				)),
+				| unknown => {
+					// We already checked that the stage type is one that exists in the flow,
+					// so we can only get here if we ourselves served a flow with a stage that we
+					// don't understand.
+					panic!("tried to check an unsupported stage type: {unknown:?}");
+				},
 			},
 		}?;