fix minimizer crash on windows

Author: ckrause

CHANGELOG.md

@@ -2,11 +2,15 @@ To install or update LODA, please follow the [installation instructions](https:/
 
 ## [Unreleased]
 
+### Bugfixes
+
+* Fix optimizer crash on Windows
+
 ### Enhancements
 
+* Reorganize folder structure
 * Improve check for faster programs
 * Improve logs
-* Reorganize folder structure
 
 ## v25.8.9
 

src/eval/optimizer.cpp

@@ -106,7 +106,7 @@ bool Optimizer::removeEmptyLoops(Program &p) const {
         Log::get().debug("Removing empty loop");
       }
       p.ops.erase(p.ops.begin() + i, p.ops.begin() + i + 2);
-      i = i - 2;
+      i = std::max<int64_t>(i - 2, 0);
       removed = true;
     }
   }