Gulp doesn't shut down on Ctrl-C when `watchGraphQlOperations` is used

Created by: mrnugget

• Sourcegraph version: main
• Platform information:

Steps to reproduce:

1. ./node_modules/.bin/gulp --color watch
2. Hit Ctrl-C

Expected behavior:

Process shuts down in reasonable amount of time (less than 1s?)

Actual behavior:

Process doesn't shut down.

---

In our dev environment the process gets killed after 10s by goreman. Until then, it blocks all the other processes from shutting down.

When I add another task to the gulpfile.js that's close to watchGenerate, except that it doesn't include watchGraphQlOperations, the shutdown is immediate:

// gulpfile.js
// [...]
const watchGenerate = gulp.series(generate, gulp.parallel(watchSchema, watchGraphQlSchema, watchGraphQlOperations))
const watchGenerateWithoutOps = gulp.series(generate, gulp.parallel(watchSchema, watchGraphQlSchema))

module.exports = {
// [...]
  watchGenerate,
// [...]
  watchGenerateWithoutOps,
}

GIF: