fix(rsc): await handler to avoid unhandled rejection (#576)

Author: hi-ogawa

packages/plugin-rsc/src/plugin.ts

@@ -303,7 +303,9 @@ export default function vitePluginRsc(
                 `[vite-rsc] failed to resolve server handler '${source}'`,
               )
               const mod = await environment.runner.import(resolved.id)
-              createRequestListener(mod.default)(req, res)
+              // ensure catching rejected promise
+              // https://github.com/mjackson/remix-the-web/blob/b5aa2ae24558f5d926af576482caf6e9b35461dc/packages/node-fetch-server/src/lib/request-listener.ts#L87
+              await createRequestListener(mod.default)(req, res)
             } catch (e) {
               next(e)
             }
@@ -336,7 +338,7 @@ export default function vitePluginRsc(
         return () => {
           server.middlewares.use(async (req, res, next) => {
             try {
-              handler(req, res)
+              await handler(req, res)
             } catch (e) {
               next(e)
             }