Fix phpstan/phpstan#8985: Expression result remembered on new()

- Added expressionHasNewInChain() check in MutatingScope::resolveType()
  to skip stored expression type lookup when the expression's receiver
  chain contains a New_ node
- New regression test in tests/PHPStan/Analyser/nsrt/bug-8985.php
- The root cause was that (new Foo())->method() produced the same
  expression key regardless of source location, so type narrowing from
  assert() on one new instance incorrectly applied to subsequent ones

Author: staabm

src/Analyser/MutatingScope.php

@@ -973,6 +973,7 @@ private function resolveType(string $exprString, Expr $node): Type
 			!$node instanceof Variable
 			&& !$node instanceof Expr\Closure
 			&& !$node instanceof Expr\ArrowFunction
+			&& !$this->expressionHasNewInChain($node)
 			&& $this->hasExpressionType($node)->yes()
 		) {
 			return $this->expressionTypes[$exprString]->getType();
@@ -990,6 +991,17 @@ private function resolveType(string $exprString, Expr $node): Type
 		return new MixedType();
 	}
 
+	private function expressionHasNewInChain(Expr $expr): bool
+	{
+		if ($expr instanceof MethodCall || $expr instanceof PropertyFetch || $expr instanceof Expr\NullsafeMethodCall || $expr instanceof Expr\NullsafePropertyFetch || $expr instanceof Expr\ArrayDimFetch) {
+			return $expr->var instanceof Expr\New_ || $this->expressionHasNewInChain($expr->var);
+		}
+		if (($expr instanceof Expr\StaticCall || $expr instanceof Expr\StaticPropertyFetch || $expr instanceof Expr\ClassConstFetch) && $expr->class instanceof Expr) {
+			return $expr->class instanceof Expr\New_ || $this->expressionHasNewInChain($expr->class);
+		}
+		return false;
+	}
+
 	/**
 	 * @param callable(Type): ?bool $typeCallback
 	 */

tests/PHPStan/Analyser/nsrt/bug-8985.php

@@ -0,0 +1,36 @@
+<?php // lint >= 8.0
+
+declare(strict_types = 1);
+
+namespace Bug8985;
+
+use function PHPStan\Testing\assertType;
+
+class Entity
+{
+	public function __construct(private string $value)
+	{
+	}
+
+	public function getValue(): string
+	{
+		return $this->value;
+	}
+}
+
+class Repository
+{
+	/** @return array<int, Entity> */
+	public function getAll(): array
+	{
+		return [new Entity('test')];
+	}
+}
+
+function () : void {
+	assert((new Repository())->getAll() === []);
+
+	$all = (new Repository())->getAll();
+	assertType('array<int, Bug8985\Entity>', $all);
+	$value = $all[0]->getValue();
+};