Fix

Author: VincentLanglet

src/Type/Php/ArrayCountValuesDynamicReturnTypeExtension.php

@@ -54,7 +54,7 @@ public function getTypeFromFunctionCall(
 			}
 
 			$outputTypes[] = TypeCombinator::intersect(
-				new ArrayType($itemType, IntegerRangeType::fromInterval(1, null)),
+				new ArrayType($itemType->toArrayKey(), IntegerRangeType::fromInterval(1, null)),
 				new NonEmptyArrayType(),
 			);
 		}

tests/PHPStan/Analyser/nsrt/array-count-values.php

@@ -46,3 +46,7 @@ public function __toString(): string
 $scalar = array_count_values([true, 1.0, false, 0.0, null]);
 
 assertType('array{}', $scalar);
+
+$intAsString = array_count_values(['1', '2', '2', '3']);
+
+assertType("non-empty-array<1|2|3, int<1, max>>", $intAsString);