diff --git a/Zend/Optimizer/zend_func_infos.h b/Zend/Optimizer/zend_func_infos.h
index 42435e695a515..0fc33ae2f6e1c 100644
--- a/Zend/Optimizer/zend_func_infos.h
+++ b/Zend/Optimizer/zend_func_infos.h
@@ -429,7 +429,7 @@ static const func_info_t func_infos[] = {
 #endif
 	F1("get_current_user", MAY_BE_STRING),
 	FN("get_cfg_var", MAY_BE_STRING|MAY_BE_ARRAY|MAY_BE_ARRAY_KEY_LONG|MAY_BE_ARRAY_KEY_STRING|MAY_BE_ARRAY_OF_STRING|MAY_BE_ARRAY_OF_ARRAY|MAY_BE_FALSE),
-	F1("error_get_last", MAY_BE_ARRAY|MAY_BE_ARRAY_KEY_STRING|MAY_BE_ARRAY_OF_LONG|MAY_BE_ARRAY_OF_STRING|MAY_BE_NULL),
+	F1("error_get_last", MAY_BE_ARRAY|MAY_BE_ARRAY_KEY_STRING|MAY_BE_ARRAY_OF_LONG|MAY_BE_ARRAY_OF_STRING|MAY_BE_ARRAY_OF_ARRAY|MAY_BE_NULL),
 	F1("highlight_file", MAY_BE_STRING|MAY_BE_BOOL),
 	F1("php_strip_whitespace", MAY_BE_STRING),
 	F1("highlight_string", MAY_BE_STRING|MAY_BE_TRUE),
diff --git a/Zend/zend.c b/Zend/zend.c
index 60eab332fa158..fcac6c08ac140 100644
--- a/Zend/zend.c
+++ b/Zend/zend.c
@@ -1050,6 +1050,8 @@ void zend_startup(zend_utility_functions *utility_functions) /* {{{ */
 	CG(map_ptr_last) = 0;
 #endif /* ZTS */
 	EG(error_reporting) = E_ALL & ~E_NOTICE;
+	EG(fatal_error_backtrace_on) = false;
+	ZVAL_UNDEF(&EG(last_fatal_error_backtrace));
 
 	zend_interned_strings_init();
 	zend_startup_builtin_functions();
diff --git a/Zend/zend_execute_API.c b/Zend/zend_execute_API.c
index 07e3d95bd60fe..1f55521fb72f1 100644
--- a/Zend/zend_execute_API.c
+++ b/Zend/zend_execute_API.c
@@ -824,7 +824,7 @@ zend_result zend_call_function(zend_fcall_info *fci, zend_fcall_info_cache *fci_
 		return SUCCESS; /* we would result in an unstable executor otherwise */
 	}
 
-	ZEND_ASSERT(fci->size == sizeof(zend_fcall_info));
+	ZEND_ASSERT(ZEND_FCI_INITIALIZED(*fci));
 
 	if (!fci_cache || !fci_cache->function_handler) {
 		char *error = NULL;
diff --git a/ext/standard/basic_functions.stub.php b/ext/standard/basic_functions.stub.php
index 1934610dc0fed..e7f4ff8844714 100644
--- a/ext/standard/basic_functions.stub.php
+++ b/ext/standard/basic_functions.stub.php
@@ -1977,7 +1977,7 @@ function get_cfg_var(string $option): string|array|false {}
 function error_log(string $message, int $message_type = 0, ?string $destination = null, ?string $additional_headers = null): bool {}
 
 /**
- * @return array<string, int|string>|null
+ * @return array<string, int|string|array>|null
  * @refcount 1
  */
 function error_get_last(): ?array {}
diff --git a/ext/standard/basic_functions_arginfo.h b/ext/standard/basic_functions_arginfo.h
index 61feae1d88c68..3d92288643159 100644
--- a/ext/standard/basic_functions_arginfo.h
+++ b/ext/standard/basic_functions_arginfo.h
@@ -1,5 +1,5 @@
 /* This is a generated file, edit the .stub.php file instead.
- * Stub hash: b0a0ccc94c6db2831f7f0b8e67562cd6a734fcdf */
+ * Stub hash: 85677dc3476d25b7820fd3a26fe39f2e9378b6e7 */
 
 ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_set_time_limit, 0, 1, _IS_BOOL, 0)
 	ZEND_ARG_TYPE_INFO(0, seconds, IS_LONG, 0)