Loader returning BigInt breaks dev server

[kesoji]

[Minimal Reproducible Code]
https://stackblitz.com/edit/github-1fxhtuec?file=app%2Froutes%2Fhome.tsx

The problem happens when comment-in a line in loader and reload page.

[Problem]
When a loader returns BigInt data, this error happens and dev server exits.

LOADER routes/home triggered - 1.12ms
TypeError: Do not know how to serialize a BigInt
    at sendEvent (file:///home/projects/github-1fxhtuec/node_modules/react-router-devtools/dist/server.js:34:18)
    at eval (file:///home/projects/github-1fxhtuec/node_modules/react-router-devtools/dist/server.js:363:9)
    at unAwaited (file:///home/projects/github-1fxhtuec/node_modules/react-router-devtools/dist/server.js:240:3)
    at eval (file:///home/projects/github-1fxhtuec/node_modules/react-router-devtools/dist/server.js:355:5)
    at async callRouteHandler (/home/projects/github-1fxhtuec/node_modules/react-router/dist/development/index.js:8628:16)
    at async commonRoute.loader (/home/projects/github-1fxhtuec/node_modules/react-router/dist/development/index.js:8740:19)
    at async eval (/home/projects/github-1fxhtuec/node_modules/react-router/dist/development/index.js:3550:19)

[0xNoWater]

FWIW I'm running into the same thing when trying this out.

file:///Users/dev/ethos/services/emporos/node_modules/react-router-devtools/dist/server.js:17
      body: JSON.stringify({ routine: "request-event", ...event })
                 ^

TypeError: Do not know how to serialize a BigInt

I had a custom reviver before switching to singleFetch, which supports these data types directly via turbo-stream under the hood. https://remix.run/docs/en/main/guides/single-fetch#streaming-data-format