Possibly a simpler reproducer for #323

src/Usages/Reproducer2Usages.php

@@ -0,0 +1,37 @@
+<?php
+declare(strict_types = 1);
+
+namespace Spaze\PHPStan\Rules\Disallowed\Usages;
+
+use PhpParser\Node;
+use PhpParser\Node\Name\FullyQualified;
+use PHPStan\Analyser\Scope;
+use PHPStan\Rules\Rule;
+use PHPStan\Rules\RuleError;
+use PHPStan\Rules\RuleErrorBuilder;
+
+/**
+ * @implements Rule<Node>
+ */
+class Reproducer2Usages implements Rule
+{
+
+	public function getNodeType(): string
+	{
+		return FullyQualified::class;
+	}
+
+
+	/**
+	 * @param FullyQualified $node
+	 * @param Scope $scope
+	 * @return list<RuleError>
+	 */
+	public function processNode(Node $node, Scope $scope): array
+	{
+		return [
+			RuleErrorBuilder::message(sprintf('class %s found in method %s', $node->toString(), $scope->getFunction()?->getName() ?? 'null'))->build(),
+		];
+	}
+
+}

tests/Usages/Reproducer2Test.php

@@ -0,0 +1,46 @@
+<?php
+declare(strict_types = 1);
+
+namespace Spaze\PHPStan\Rules\Disallowed\Usages;
+
+use PHPStan\Rules\Rule;
+use PHPStan\Testing\RuleTestCase;
+
+class Reproducer2Test extends RuleTestCase
+{
+
+	protected function shouldNarrowMethodScopeFromConstructor(): bool
+	{
+		return true;
+	}
+
+
+	protected function getRule(): Rule
+	{
+		return new Reproducer2Usages();
+	}
+
+
+	public function testRule(): void
+	{
+		$this->analyse([__DIR__ . '/../src/Reproducer2Class.php'], [
+			[
+				'class DateTime found in method null',
+				12,
+			],
+			[
+				'class Baz\Waldo found in method null',
+				16,
+			],
+		]);
+	}
+
+
+	public static function getAdditionalConfigFiles(): array
+	{
+		return [
+			__DIR__ . '/../../extension.neon',
+		];
+	}
+
+}

tests/src/Reproducer2Class.php

@@ -0,0 +1,19 @@
+<?php
+declare(strict_types = 1);
+
+namespace Reproducer2;
+
+class Reproducer2Class
+{
+	public function __construct()
+	{
+	}
+
+	public function foo(\DateTime $d): void
+	{
+	}
+
+	public function bar(\Baz\Waldo $d): void
+	{
+	}
+}