IE Edge 17 issue

IE Edge Preview 17 is not throwing an exception Raven can handle. I assume the exception returned is not an Error object or does not have the Error prototype. It’s hard for me to verify the issue as Browserstack does not have IE preview available. Im currently downloading windows IE VM preview to try and verify.

Discarded invalid value for parameter ‘exception’ Collapse
Name
exception
Value

{
values: [
{
stacktrace: {
frames: [
{
filename: "***** url  ***" 
function: ?, 
in_app: True
}
]
}
}
]
}