Fix

Author: ondrejmirtes

Diff for: phpstan-baseline.neon

@@ -1,5 +1,10 @@
 parameters:
 	ignoreErrors:
+		-
+			message: "#^Casting to int something that's already int\\.$#"
+			count: 2
+			path: src/Analyser/MutatingScope.php
+
 		-
 			message: "#^Only numeric types are allowed in pre\\-decrement, bool\\|float\\|int\\|string\\|null given\\.$#"
 			count: 1

Diff for: src/Analyser/MutatingScope.php

@@ -5498,7 +5498,7 @@ private function integerRangeMath(Type $range, Expr $node, Type $operand): Type
 			}
 		}
 
-		return IntegerRangeType::fromInterval($min, $max);
+		return IntegerRangeType::fromInterval($min !== null ? (int) $min : null, $max !== null ? (int) $max : null);
 	}
 
 }