Fixed bug #75556 (Invalid opcode 138/1/1)

NEWS

@@ -9,6 +9,9 @@ PHP                                                                        NEWS
   . Fixed bug #74862 (Unable to clone instance when private __clone defined).
     (Daniel Ciochiu)
 
+- Opcache:
+  . Fixed bug #75556 (Invalid opcode 138/1/1). (Laruence)
+
 - PCRE:
   . Fixed bug #74183 (preg_last_error not returning error code after error).
     (Andrew Nester)

ext/opcache/Optimizer/zend_optimizer.c

@@ -306,6 +306,8 @@ int zend_optimizer_update_op1_const(zend_op_array *op_array,
 			/* This would require a non-local change.
 			 * zend_optimizer_replace_by_const() supports this. */
 			return 0;
+		case ZEND_INSTANCEOF:
+			return 0;
 		case ZEND_CASE:
 		case ZEND_FETCH_LIST:
 			return 0;

ext/opcache/tests/bug75556.phpt

@@ -0,0 +1,26 @@
+--TEST--
+Bug #75556 (Invalid opcode 138/1/1)
+--INI--
+opcache.enable=1
+opcache.enable_cli=1
+opcache.optimization_level=-1
+--SKIPIF--
+<?php require_once('skipif.inc'); ?>
+--FILE--
+<?php
+ function createFromFormat($format, $date, ?\DateTimeZone $tz = null): ?\DateTimeInterface
+ {
+	 if ($tz !== null
+			 || ($tz instanceof \DateTimeZone && !in_array($tz->getName(), ['UTC', 'Z'], true))
+		) {
+		 $msg = 'Date objects must have UTC as their timezone';
+		 throw new \UnexpectedValueException($msg);
+	 }
+
+	return null;
+}
+
+var_dump(createFromFormat('m/d/Y', '12/07/2017', null));
+?>
+--EXPECT--
+NULL