SplFileObject::fgets() cannot return false

spl_filesystem_file_read() is called with silent=0, so it will
throw on failure.

Author: nikic

ext/spl/spl_directory.c

@@ -2196,7 +2196,7 @@ PHP_METHOD(SplFileObject, fgets)
 	CHECK_SPL_FILE_OBJECT_IS_INITIALIZED(intern);
 
 	if (spl_filesystem_file_read(intern, 0) == FAILURE) {
-		RETURN_FALSE;
+		RETURN_THROWS();
 	}
 	RETURN_STRINGL(intern->u.file.current_line, intern->u.file.current_line_len);
 } /* }}} */

ext/spl/spl_directory.stub.php

@@ -199,7 +199,7 @@ public function eof() {}
     /** @return bool */
     public function valid() {}
 
-    /** @return string|false */
+    /** @return string */
     public function fgets() {}
 
     /** @return string|false */
@@ -281,7 +281,7 @@ public function getChildren() {}
     public function seek(int $line) {}
 
     /**
-     * @return string|false
+     * @return string
      * @alias SplFileObject::fgets
      */
     public function getCurrentLine() {}

ext/spl/spl_directory_arginfo.h

@@ -1,5 +1,5 @@
 /* This is a generated file, edit the .stub.php file instead.
- * Stub hash: b4aa4816381e8380d5dc0c5f9b9969992a72f9ed */
+ * Stub hash: 285af54cf7b3f3ef3f0d673b248c5afbd4cc440e */
 
 ZEND_BEGIN_ARG_INFO_EX(arginfo_class_SplFileInfo___construct, 0, 0, 1)
 	ZEND_ARG_TYPE_INFO(0, filename, IS_STRING, 0)