Deleting body file results in infinitely sending request

[gricey432]

Bit of an odd one, if you pick a file for the request body and then delete the file, clicking Send results in the request apparently running but never completing.

Debug shows an unhandled promise rejection

index.js:120342 Unhandled promise rejection: NotFoundError: A requested file or directory could not be found at the time an operation was processed.
window.addEventListener @ index.js:120342

Expected outcome

An error should inform the user their file is unreadable

Actual outcome

UI looks like the request is in flight but hasn't returned yet

Versions

App: 10.0.12
Platform: 5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36

Steps to reproduce

1. Create POST request
2. Choose a file for body
3. Delete the file on disk
4. Click Send