UserAgent: Mozilla/5.0 (X11; CrOS x86_64 7978.66.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.91 Safari/537.36
Platform: windows

Steps to reproduce the problem:
creating a PDF with the following java script

var interval = app.setInterval("app.alert('this will not stop');",5000);
app.clearInterval(interval);

then open the pdf in chrome

What is the expected behavior?
You should never see the pop up occur because the Interval was cleared before it could trigger.  It should also not keep going

What went wrong?
The PDF keeps showing the pop up ever 5 seconds.

Did this work before? Yes 

Chrome version: 50.0.2661.91  Channel: stable
OS Version: 7978.66.0
Flash Version: Shockwave Flash 21.0 r0

the problem is in app::ClearTimerCommon the first line checks to see if of type CJS_Value::VT_fxobject.  how ever, there is no way for getType() to return CJS_Value::VT_fxobject. 

changing that line to 
if (param.GetType() != CJS_Value::VT_object)

seems to have fixed the problem

faulty line of code
https://cs.chromium.org/chromium/src/third_party/pdfium/fpdfsdk/javascript/app.cpp?rcl=1465989426&l=461
 

Deleted: bug.pdf 1.1 KB

bug.pdf 1.1 KB Download

Deleted: bug.js 103 bytes

bug.js 103 bytes View Download