[dtech]

You can still have them in 2 commits, and configure your CI to build both of them, and the first 1 should fail.

We actually have a rule that there must be 1 commit just introducing a test that fails on CI for bugfix PRs.

[chrisweekly]

That's interesting, explicitly to require that bugs be reproduced in CI. It makes sense in theory, but in praxis (IME) CI systems tend to be overtaxed / underprovisioned - meaning this extra burden might be questionable. /$.02

[dtech]

Given the cost a typical CI system vs the salary cost of a typical dev, the business case should be fairly easy that devs always should have CI capacity available.

[nemetroid]

The same burden is present when splitting the two commits into two PRs.

[chrisweekly]

Actually no, the burden I referred to was -- unrelated to stacked vs serial PRs -- specifically the GP's practice of requiring that tests fail in CI.

"rule that there must be 1 commit just introducing a test that fails on CI for bugfix PRs"