Fixed PHPStan complaints

src/console/ConsoleReader.php

@@ -23,6 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\console;
 
+use pocketmine\utils\AssumptionFailedError;
 use function fclose;
 use function fgets;
 use function fopen;
@@ -44,7 +45,9 @@ final class ConsoleReader{
 			fclose($this->stdin);
 		}
 
-		$this->stdin = fopen("php://stdin", "r");
+		$stdin = fopen("php://stdin", "r");
+		if($stdin === false) throw new AssumptionFailedError("Opening stdin should never fail");
+		$this->stdin = $stdin;
 	}
 
 	/**

tests/phpstan/configs/actual-problems.neon

@@ -505,6 +505,11 @@ parameters:
 			count: 1
 			path: ../../../src/command/defaults/TimingsCommand.php
 
+		-
+			message: "#^Call to function is_resource\\(\\) with resource will always evaluate to true\\.$#"
+			count: 2
+			path: ../../../src/console/ConsoleReader.php
+
 		-
 			message: "#^Parameter \\#1 \\$json of function json_decode expects string, string\\|false given\\.$#"
 			count: 1