Add non regression tests (phpstan#5110)

Author: VincentLanglet

tests/PHPStan/Rules/Exceptions/CatchWithUnthrownExceptionRuleTest.php

@@ -667,6 +667,21 @@ public function testBug9146(): void
 		]);
 	}
 
+	#[RequiresPhp('>= 8.3')]
+	public function testPr5105(): void
+	{
+		$this->analyse([__DIR__ . '/data/pr-5105.php'], [
+			[
+				'Dead catch - RuntimeException is never thrown in the try block.',
+				15,
+			],
+			[
+				'Dead catch - Error is never thrown in the try block.',
+				28,
+			],
+		]);
+	}
+
 	public function testBug9146NonStrict(): void
 	{
 		$this->analyse([__DIR__ . '/data/bug-9146-non-strict.php'], [

tests/PHPStan/Rules/Exceptions/data/pr-5105.php

@@ -0,0 +1,32 @@
+<?php // lint >= 8.3
+
+declare(strict_types = 1);
+
+namespace Pr5105;
+
+enum ReactionType: string
+{
+	case EMOJI_HEART = '❤️';
+
+	public static function tryFromName1(string $name): ?self
+	{
+		try {
+			return ReactionType::{$name};
+		} catch (\RuntimeException) {
+			return null;
+		}
+	}
+
+	public static function tryFromName2(string $name): ?self
+	{
+		if ($name !== 'EMOJI_HEART') {
+			return null;
+		}
+
+		try {
+			return ReactionType::{$name};
+		} catch (\Error) {
+			return null;
+		}
+	}
+}