Hi all,
I have an issue in Chrome with absolutely normal script which from time to
time throw "Uncaught SyntaxError: Unexpected token )".
It happens only when I use our proxy server which decrypt HTTPS traffic for
me. In DevTools this script looks absolutely normal without any lost or
wrong symbols in it.
Trying to investigate it further I placed several breakpoints and ended up
with such stacktrace:
v8::internal::ParserBase<v8::internal::ParserTraits>::ReportUnexpectedToken(v8::internal::Token::Value
token)
v8::internal::Parser::ParseFunctionLiteral(const
v8::internal::AstRawString * function_name, v8::internal::Scanner::Location
function_name_location, v8::internal::FunctionNameValidity
function_name_validity, v8::internal::FunctionKind kind, int
function_token_pos, v8::internal::FunctionLiteral::FunctionType
function_type, v8::internal::LanguageMode language_mode, bool * ok)
v8::internal::Parser::ParseLazy(v8::internal::Isolate * isolate,
v8::internal::ParseInfo * info, v8::internal::Utf16CharacterStream * source)
v8::internal::Parser::ParseLazy(v8::internal::Isolate * isolate,
v8::internal::ParseInfo * info)
v8::internal::Parser::Parse(v8::internal::ParseInfo * info)
v8::internal::Parser::ParseStatic(v8::internal::ParseInfo * info)
v8::internal::`anonymous
namespace'::GetUnoptimizedCodeCommon(v8::internal::CompilationInfo * info)
v8::internal::`anonymous
namespace'::GetLazyCode(v8::internal::Handle<v8::internal::JSFunction>
function)
v8::internal::Compiler::Compile(v8::internal::Handle<v8::internal::JSFunction>
function, v8::internal::Compiler::ClearExceptionFlag flag)
v8::internal::__RT_impl_Runtime_CompileLazy(v8::internal::Arguments
args, v8::internal::Isolate * isolate)
v8::internal::Runtime_CompileLazy(int args_length, v8::internal::Object
* * args_object, v8::internal::Isolate * isolate)
[External Code]
[Frames below may be incorrect and/or missing]
v8::internal::`anonymous namespace'::Invoke(v8::internal::Isolate *
isolate, bool is_construct, v8::internal::Handle<v8::internal::Object>
target, v8::internal::Handle<v8::internal::Object> receiver, int argc,
v8::internal::Handle<v8::internal::Object> * args,
v8::internal::Handle<v8::internal::Object> new_target)
v8::internal::Execution::Call(v8::internal::Isolate * isolate,
v8::internal::Handle<v8::internal::Object> callable,
v8::internal::Handle<v8::internal::Object> receiver, int argc,
v8::internal::Handle<v8::internal::Object> * argv)
v8::Function::Call(v8::Local<v8::Context> context, v8::Local<v8::Value>
recv, int argc, v8::Local<v8::Value> * argv)
blink::V8ScriptRunner::callFunction(v8::Local<v8::Function> function,
blink::ExecutionContext * context, v8::Local<v8::Value> receiver, int argc,
v8::Local<v8::Value> * args, v8::Isolate * isolate)
blink::ScriptController::callFunction(blink::ExecutionContext *
context, v8::Local<v8::Function> function, v8::Local<v8::Value> receiver,
int argc, v8::Local<v8::Value> * info, v8::Isolate * isolate)
blink::ScriptController::callFunction(v8::Local<v8::Function> function,
v8::Local<v8::Value> receiver, int argc, v8::Local<v8::Value> * info)
blink::V8EventListener::callListenerFunction(blink::ScriptState *
scriptState, v8::Local<v8::Value> jsEvent, blink::Event * event)
blink::V8AbstractEventListener::invokeEventHandler(blink::ScriptState *
scriptState, blink::Event * event, v8::Local<v8::Value> jsEvent)
blink::V8AbstractEventListener::handleEvent(blink::ScriptState *
scriptState, blink::Event * event)
blink::V8AbstractEventListener::handleEvent(blink::ExecutionContext *
executionContext, blink::Event * event)
blink::EventTarget::fireEventListeners(blink::Event * event,
blink::EventTargetData * d,
blink::HeapVector<blink::RegisteredEventListener,1> & entry)
blink::EventTarget::fireEventListeners(blink::Event * event)
blink::Node::handleLocalEvents(blink::Event & event)
blink::NodeEventContext::handleLocalEvents(blink::Event & event)
blink::EventDispatcher::dispatchEventAtTarget()
blink::EventDispatcher::dispatch()
blink::EventDispatchMediator::dispatchEvent(blink::EventDispatcher &
dispatcher)
blink::EventDispatcher::dispatchEvent(blink::Node & node,
blink::EventDispatchMediator * mediator)
blink::Node::dispatchEventInternal(blink::Event * event)
I met several pages with this problem and their stacktrace always looked
similar. Exception always pointed to something like this:
$(function() {
// some long and complicated function...
});
>From what I managed to gather now it seems like in
function Parser::ParseLazy(Isolate* isolate, ParseInfo* info) in parser.cc,
shared_info->start_position() points to the wrong position. But script text
is Ok. Unfortunately I don't have reliably working test case for the issue
so I can't file a bug for it. Just trying to figure out myself. But I don't
familiar with blink and v8 sources so I need some help. Could you show me
where to look now? Parser logic rather complicated for me and I'm not quite
sure that I'll be able to find a correct place where start_position was set.
--
--
v8-users mailing list
v8-users@googlegroups.com
http://groups.google.com/group/v8-users
---
You received this message because you are subscribed to the Google Groups
"v8-users" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to v8-users+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
