Process enum case expression

src/Analyser/NodeScopeResolver.php

@@ -1486,6 +1486,13 @@ private function processStmtNode(
 					$scope->getNativeType($const->value),
 				);
 			}
+		} elseif ($stmt instanceof Node\Stmt\EnumCase) {
+			$hasYield = false;
+			$throwPoints = [];
+			$this->processAttributeGroups($stmt->attrGroups, $scope, $nodeCallback);
+			if ($stmt->expr !== null) {
+				$this->processExprNode($stmt->expr, $scope, $nodeCallback, ExpressionContext::createDeep());
+			}
 		} elseif ($stmt instanceof Node\Stmt\Nop) {
 			$hasYield = false;
 			$throwPoints = $overridingThrowPoints ?? [];

tests/PHPStan/Node/AttributeArgRuleTest.php

@@ -5,6 +5,7 @@
 use PhpParser\Node;
 use PHPStan\Rules\Rule;
 use PHPStan\Testing\RuleTestCase;
+use const PHP_VERSION_ID;
 
 /**
  * @extends RuleTestCase<Rule>
@@ -42,4 +43,18 @@ public function testRule(string $file, string $expectedError, array $lines): voi
 		$this->analyse([$file], $errors);
 	}
 
+	public function testEnumCaseAttribute(): void
+	{
+		if (PHP_VERSION_ID < 80100) {
+			$this->markTestSkipped('Test requires PHP 8.1.');
+		}
+
+		$this->analyse([__DIR__ . '/data/enum-case-attribute.php'], [
+			[
+				AttributeArgRule::ERROR_MESSAGE,
+				10,
+			],
+		]);
+	}
+
 }

tests/PHPStan/Node/data/enum-case-attribute.php

@@ -0,0 +1,13 @@
+<?php // lint >= 8.1
+
+namespace EnumCaseAttributeCheck;
+
+use NodeCallbackCalled\UniversalAttribute;
+
+enum Foo
+{
+
+	#[UniversalAttribute(1)]
+	case TEST;
+
+}

tests/PHPStan/Rules/DeadCode/UnusedPrivateConstantRuleTest.php

@@ -83,4 +83,13 @@ public function testBug8204(): void
 		$this->analyse([__DIR__ . '/data/bug-8204.php'], []);
 	}
 
+	public function testBug9005(): void
+	{
+		if (PHP_VERSION_ID < 80100) {
+			$this->markTestSkipped('Test requires PHP 8.1.');
+		}
+
+		$this->analyse([__DIR__ . '/data/bug-9005.php'], []);
+	}
+
 }

tests/PHPStan/Rules/DeadCode/data/bug-9005.php

@@ -0,0 +1,12 @@
+<?php // lint >= 8.1
+
+namespace Bug9005;
+
+enum Test: string
+{
+	private const PREFIX = 'my-stuff-';
+
+	case TESTING = self::PREFIX . 'test';
+
+	case TESTING2 = self::PREFIX . 'test2';
+}