From d6d9869b98c4c8ee9cd36c7fa32c61c4df7d38d2 Mon Sep 17 00:00:00 2001
From: ilya <ilya@cow.fi>
Date: Fri, 21 Nov 2025 16:58:03 +0000
Subject: [PATCH] Don't solve empty auctions

---
 crates/driver/src/domain/competition/mod.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/crates/driver/src/domain/competition/mod.rs b/crates/driver/src/domain/competition/mod.rs
index d9cf51cbc9..1fb751b9ca 100644
--- a/crates/driver/src/domain/competition/mod.rs
+++ b/crates/driver/src/domain/competition/mod.rs
@@ -185,6 +185,11 @@ impl Competition {
         drop(timer);
         tracing::debug!(?elapsed, "auction task execution time");
 
+        if auction.orders.is_empty() {
+            tracing::info!("no orders left after pre-processing; skipping solving");
+            return Ok(None);
+        }
+
         let auction = &auction;
 
         // Fetch the solutions from the solver.