Fix stubs for bzerr* functions

These can return false if the stream is not a bz2 stream. Also
emit a warning in this case, this should not be failing silently.

Author: nikic

ext/bz2/bz2.c

@@ -578,6 +578,7 @@ static void php_bz2_error(INTERNAL_FUNCTION_PARAMETERS, int opt)
 	php_stream_from_zval(stream, bzp);
 
 	if (!php_stream_is(stream, PHP_STREAM_IS_BZIP2)) {
+		php_error_docref(NULL, E_WARNING, "Stream is not a bz2 stream");
 		RETURN_FALSE;
 	}
 

ext/bz2/bz2.stub.php

@@ -30,13 +30,13 @@ function bzflush($bz): bool {}
 function bzclose($bz): bool {}
 
 /** @param resource $bz */
-function bzerrno($bz): int {}
+function bzerrno($bz): int|false {}
 
 /** @param resource $bz */
-function bzerrstr($bz): string {}
+function bzerrstr($bz): string|false {}
 
 /** @param resource $bz */
-function bzerror($bz): array {}
+function bzerror($bz): array|false {}
 
 function bzcompress(string $data, int $block_size = 4, int $work_factor = 0): string|int {}
 

ext/bz2/bz2_arginfo.h

@@ -1,5 +1,5 @@
 /* This is a generated file, edit the .stub.php file instead.
- * Stub hash: 0cd7792480671883ebae30ae8358b8f8e3390474 */
+ * Stub hash: 67689133cbaffce7c139578f5070ecfc8ab6ec55 */
 
 ZEND_BEGIN_ARG_INFO_EX(arginfo_bzopen, 0, 0, 2)
 	ZEND_ARG_INFO(0, file)
@@ -23,15 +23,15 @@ ZEND_END_ARG_INFO()
 
 #define arginfo_bzclose arginfo_bzflush
 
-ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_bzerrno, 0, 1, IS_LONG, 0)
+ZEND_BEGIN_ARG_WITH_RETURN_TYPE_MASK_EX(arginfo_bzerrno, 0, 1, MAY_BE_LONG|MAY_BE_FALSE)
 	ZEND_ARG_INFO(0, bz)
 ZEND_END_ARG_INFO()
 
-ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_bzerrstr, 0, 1, IS_STRING, 0)
+ZEND_BEGIN_ARG_WITH_RETURN_TYPE_MASK_EX(arginfo_bzerrstr, 0, 1, MAY_BE_STRING|MAY_BE_FALSE)
 	ZEND_ARG_INFO(0, bz)
 ZEND_END_ARG_INFO()
 
-ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_bzerror, 0, 1, IS_ARRAY, 0)
+ZEND_BEGIN_ARG_WITH_RETURN_TYPE_MASK_EX(arginfo_bzerror, 0, 1, MAY_BE_ARRAY|MAY_BE_FALSE)
 	ZEND_ARG_INFO(0, bz)
 ZEND_END_ARG_INFO()
 

ext/bz2/tests/bzerr_functions_on_invalid_stream.phpt

@@ -0,0 +1,20 @@
+--TEST--
+Calling bzerr* functions on non-bz2 streams
+--SKIPIF--
+<?php if (!extension_loaded("bz2")) print "skip"; ?>
+--FILE--
+<?php
+$f = fopen(__FILE__, 'r');
+var_dump(bzerrno($f));
+var_dump(bzerrstr($f));
+var_dump(bzerror($f));
+?>
+--EXPECTF--
+Warning: bzerrno(): Stream is not a bz2 stream in %s on line %d
+bool(false)
+
+Warning: bzerrstr(): Stream is not a bz2 stream in %s on line %d
+bool(false)
+
+Warning: bzerror(): Stream is not a bz2 stream in %s on line %d
+bool(false)