From f73a0a089bd31867b6b9e91931f362e9a087bbf2 Mon Sep 17 00:00:00 2001
From: Joe DeCock <josephdecock@gmail.com>
Date: Mon, 13 Nov 2023 16:35:27 -0600
Subject: [PATCH] Fix PAR exception message

---
 src/IdentityServer/Endpoints/PushedAuthorizationEndpoint.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/IdentityServer/Endpoints/PushedAuthorizationEndpoint.cs b/src/IdentityServer/Endpoints/PushedAuthorizationEndpoint.cs
index c7571c367..9cacd63d1 100644
--- a/src/IdentityServer/Endpoints/PushedAuthorizationEndpoint.cs
+++ b/src/IdentityServer/Endpoints/PushedAuthorizationEndpoint.cs
@@ -93,7 +93,7 @@ public async Task<IEndpointResult> ProcessAsync(HttpContext context)
                 Telemetry.Metrics.PushedAuthorizationRequestFailure(parValidationResult.ValidatedRequest.ClientId, fail.Error);
                 return new PushedAuthorizationErrorResult(fail);
             default:
-                throw new Exception("Can't happen");
+                throw new Exception("Unexpected pushed authorization response. The result of the pushed authorization response generator should be either a PushedAuthorizationSuccess or PushedAuthorizationFailure.");
         }
     }