Setting Origin on request headers causes sentry-electron to crash Electron

[timfish]

Many APIs will reject requests without an Origin header, or an Origin set to file://*. To mitigate this in Electron, it's common to add a dummy Origin header like this:

app.on('ready', () => {
  session.defaultSession.webRequest.onBeforeSendHeaders(
    (details: any, callback: any) => {
      details.requestHeaders.Origin = 'www.some-random-origin.com';
      callback({ cancel: false, requestHeaders: details.requestHeaders });
    }
  );
});

With the above, sentry-electron@0.17.1 will immediately crash on attempting to upload a minidump which will usually be during startup..

This regression is no doubt due to a recent change to electron-fetch:

v1.2.0

• Using electron's defaultSession by default

[timfish]

Once I disabled adding this header, Sentry uploaded this crash which looks like this: