From 8985f865e2f2e918ee1a5c094e94d6e059615f0b Mon Sep 17 00:00:00 2001
From: Lawrence Chen <54008264+lawrencecchen@users.noreply.github.com>
Date: Thu, 12 Mar 2026 06:08:27 -0700
Subject: [PATCH] Drain timed out remote daemon semaphores

---
 Sources/Workspace.swift | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Sources/Workspace.swift b/Sources/Workspace.swift
index 8ab72d09..496ebeb2 100644
--- a/Sources/Workspace.swift
+++ b/Sources/Workspace.swift
@@ -718,6 +718,9 @@ final class WorkspaceRemoteDaemonPendingCallRegistry {
             queue.sync {
                 pendingCalls.removeValue(forKey: call.id)
             }
+            // A response can win the race immediately before timeout cleanup removes the call.
+            // Drain any late signal so DispatchSemaphore is not deallocated with a positive count.
+            _ = call.semaphore.wait(timeout: .now())
             return .timedOut
         }