negating boolval fix

CPMpy · Jul 3, 2023 · 6f20a91 · 6f20a91
1 parent 06f09c3
commit 6f20a91
Showing 1 changed file with 1 addition and 2 deletions.
diff --git a/cpmpy/expressions/core.py b/cpmpy/expressions/core.py
@@ -361,8 +361,7 @@ def value(self):
         return self.args[0]
 
     def __invert__(self):
-        self.args[0] = not self.args[0]
-        return self
+        return BoolVal(not self.args[0])
 
     def __bool__(self):
         """Called to implement truth value testing and the built-in operation bool(), return stored value"""