From 961ce3809064030d10c6055875111503129dcaad Mon Sep 17 00:00:00 2001
From: nilsnolde <nilsnolde@proton.me>
Date: Tue, 12 Mar 2024 17:15:14 +0100
Subject: [PATCH] fix interrupt n

---
 src/thor/costmatrix.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/thor/costmatrix.cc b/src/thor/costmatrix.cc
index 7c40de2e35..ca75a6b771 100644
--- a/src/thor/costmatrix.cc
+++ b/src/thor/costmatrix.cc
@@ -166,6 +166,7 @@ bool CostMatrix::SourceToTarget(Api& request,
   // search from all source locations. Connections between the 2 search
   // spaces is checked during the forward search.
   uint32_t n = 0;
+  uint32_t interrupt_n = 0;
   while (true) {
     // First iterate over all targets, then over all sources: we only for sure
     // check the connection between both trees on the forward search, so reverse
@@ -252,10 +253,9 @@ bool CostMatrix::SourceToTarget(Api& request,
       throw valhalla_exception_t{430};
     }
     // Allow this process to be aborted
-    if (interrupt_ && (n % kInterruptIterationsInterval) == 0) {
+    if (interrupt_ && (interrupt_n++ % kInterruptIterationsInterval) == 0) {
       (*interrupt_)();
     }
-    n++;
   }
 
   // resize/reserve all properties of Matrix on first pass only