fix

Author: staabm

src/Rules/Variables/UnsetRule.php

@@ -48,7 +48,7 @@ public function processNode(Node $node, Scope $scope): array
 		return $errors;
 	}
 
-	private function canBeUnset(Node $node, Scope $scope, bool $inArrayDimFetch = false): ?IdentifierRuleError
+	private function canBeUnset(Node $node, Scope $scope): ?IdentifierRuleError
 	{
 		if ($node instanceof Node\Expr\Variable && is_string($node->name)) {
 			$hasVariable = $scope->hasVariableType($node->name);
@@ -77,7 +77,9 @@ private function canBeUnset(Node $node, Scope $scope, bool $inArrayDimFetch = fa
 					->build();
 			}
 
-			return $this->canBeUnset($node->var, $scope, true);
+			if (!$node->var instanceof Node\Expr\PropertyFetch) {
+				return $this->canBeUnset($node->var, $scope);
+			}
 		} elseif (
 			$node instanceof Node\Expr\PropertyFetch
 			&& $node->name instanceof Node\Identifier
@@ -117,7 +119,7 @@ private function canBeUnset(Node $node, Scope $scope, bool $inArrayDimFetch = fa
 					->line($node->getStartLine())
 					->identifier('unset.hookedProperty')
 					->build();
-			} elseif ($this->phpVersion->supportsPropertyHooks() && !$inArrayDimFetch) {
+			} elseif ($this->phpVersion->supportsPropertyHooks()) {
 				if (
 					!$propertyReflection->isPrivate()
 					&& !$propertyReflection->isFinal()->yes()

tests/PHPStan/Rules/Variables/data/unset-hooked-property.php

@@ -137,3 +137,14 @@ public function render(): array
 		return parent::render();
 	}
 }
+
+class UnsetReadonly
+{
+	/** @var int[][] */
+	public readonly array $a;
+
+	public function doFoo(): void
+	{
+		unset($this->a[5]);
+	}
+}