From 38a8644ae3f6354022cff4f86b82c8d2bf320085 Mon Sep 17 00:00:00 2001
From: Nikolaj Bjorner <nbjorner@microsoft.com>
Date: Sun, 14 Jun 2026 22:24:02 -0700
Subject: [PATCH] avoid double cancel

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
---
 src/solver/parallel_tactical2.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/solver/parallel_tactical2.cpp b/src/solver/parallel_tactical2.cpp
index 8f1045c5e..921e6dcf6 100644
--- a/src/solver/parallel_tactical2.cpp
+++ b/src/solver/parallel_tactical2.cpp
@@ -482,6 +482,8 @@ class parallel_solver {
 
         void set_cancel() {
             std::scoped_lock lock(mux);
+            if (m_state != state::is_running)
+                return;
             cancel_workers_unlocked();
         }