Handle bailouts during preload linking

ext/opcache/ZendAccelerator.c

@@ -3850,7 +3850,14 @@ static int accel_preload(const char *config)
 		zend_hash_graceful_reverse_destroy(&EG(symbol_table));
 		zend_hash_init(&EG(symbol_table), 0, NULL, ZVAL_PTR_DTOR, 0);
 
-		preload_link();
+		/* Inheritance errors may be thrown during linking */
+		zend_try {
+			preload_link();
+		} zend_catch {
+			ret = FAILURE;
+			goto finish;
+		} zend_end_try();
+
 		preload_remove_empty_includes();
 
 		/* Don't preload constants */
@@ -3940,6 +3947,7 @@ static int accel_preload(const char *config)
 		zend_shared_alloc_destroy_xlat_table();
 	}
 
+finish:
 	zend_hash_destroy(preload_scripts);
 	efree(preload_scripts);
 	preload_scripts = NULL;

ext/opcache/tests/preload_006.phpt

@@ -0,0 +1,15 @@
+--TEST--
+Handling of errors during linking
+--INI--
+opcache.enable=1
+opcache.enable_cli=1
+opcache.optimization_level=-1
+opcache.preload={PWD}/preload_inheritance_error_ind.inc
+--SKIPIF--
+<?php require_once('skipif.inc'); ?>
+--FILE--
+<?php
+echo "Foobar\n";
+?>
+--EXPECT--
+Fatal error: Declaration of B::foo($bar) must be compatible with A::foo() in Unknown on line 0

ext/opcache/tests/preload_inheritance_error.inc

@@ -0,0 +1,9 @@
+<?php
+
+interface A {
+    public function foo();
+}
+
+class B implements A {
+    public function foo($bar) {}
+}

ext/opcache/tests/preload_inheritance_error_ind.inc

@@ -0,0 +1,2 @@
+<?php
+opcache_compile_file(__DIR__ . '/preload_inheritance_error.inc');