Why do Background jobs always exit code 0

[snowystinger]

If I want to run lint + constraints + something else in parallel, always exiting with code 0 means my CI jobs never fail.

berry/packages/yarnpkg-shell/tests/shell.test.ts

Line 2004 in 7fab4f1

it(`should print errors to stderr and always exit with exit code 0`, async () => {

@paul-soporan looks like you were the implementor for this feature, can you share any insight