From fd9f1d339f529bd66b46fad59f85ead4ccb8e9c5 Mon Sep 17 00:00:00 2001
From: Giovanni Harting <539@idlegandalf.com>
Date: Sun, 26 Apr 2026 13:02:50 +0200
Subject: [PATCH] hold doneQLock when reading doneQ for unknown-mode heuristic

---
 buildmanager.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/buildmanager.go b/buildmanager.go
index fc08648..59046d3 100644
--- a/buildmanager.go
+++ b/buildmanager.go
@@ -150,6 +150,7 @@ func (b *BuildManager) buildQueue(ctx context.Context, queue []*ProtoPackage) er
 		}
 
 		// if only unknown packages are left, enable unknown buildmode
+		doneQLock.RLock()
 		b.buildingLock.RLock()
 		if up == len(queue)-(len(doneQ)+len(b.building)) {
 			// clear queueNoMatch on the transition so the next iteration
@@ -161,6 +162,7 @@ func (b *BuildManager) buildQueue(ctx context.Context, queue []*ProtoPackage) er
 			unknownBuilds = true
 		}
 		b.buildingLock.RUnlock()
+		doneQLock.RUnlock()
 	}
 	return nil
 }