Remove include "sanity check" to get better error

Zend/tests/require_directory.phpt

@@ -0,0 +1,17 @@
+--TEST--
+Including a directory generates an error
+--FILE--
+<?php
+
+/* Just a random test directory */
+$dir = __DIR__ . '/variadic';
+require $dir;
+
+?>
+--EXPECTF--
+Notice: require(): Read of %d bytes failed with errno=21 Is a directory in %s on line %d
+
+Fatal error: Uncaught Error: Failed opening required '%s' (include_path='.:') in %s:%d
+Stack trace:
+#0 {main}
+  thrown in %s on line %d

ext/standard/tests/file/bug35740.phpt

@@ -8,7 +8,7 @@ include (__DIR__);
 echo "Done\n";
 ?>
 --EXPECTF--
-Warning: include(%s): Failed to open stream: %s in %s on line %d
+Notice: include(): Read of %s bytes failed with errno=21 Is a directory in %s on line %d
 
 Warning: include(): Failed opening '%s' for inclusion (include_path='%s') in %s on line %d
 Done

main/streams/plain_wrapper.c

@@ -161,7 +161,7 @@ typedef struct {
 
 static int do_fstat(php_stdio_stream_data *d, int force)
 {
-	if (!d->cached_fstat || (force && !d->no_forced_fstat)) {
+	if (!d->cached_fstat || force) {
 		int fd;
 		int r;
 
@@ -1188,30 +1188,7 @@ PHPAPI php_stream *_php_stream_fopen(const char *filename, const char *mode, zen
 				efree(persistent_id);
 			}
 
-			/* WIN32 always set ISREG flag */
 #ifndef PHP_WIN32
-			/* sanity checks for include/require.
-			 * We check these after opening the stream, so that we save
-			 * on fstat() syscalls */
-			if (options & STREAM_OPEN_FOR_INCLUDE) {
-				php_stdio_stream_data *self = (php_stdio_stream_data*)ret->abstract;
-				int r;
-
-				r = do_fstat(self, 0);
-				if ((r == 0 && !S_ISREG(self->sb.st_mode))) {
-					if (opened_path) {
-						zend_string_release_ex(*opened_path, 0);
-						*opened_path = NULL;
-					}
-					php_stream_close(ret);
-					return NULL;
-				}
-
-				/* Make sure the fstat result is reused when we later try to get the
-				 * file size. */
-				self->no_forced_fstat = 1;
-			}
-
 			if (options & STREAM_USE_BLOCKING_PIPE) {
 				php_stdio_stream_data *self = (php_stdio_stream_data*)ret->abstract;
 				self->is_pipe_blocking = 1;