Only the first command runs with --kill-others -m 1 flags in v9

[quantuminformation]

node v22.10.0, mac OS 15/0/1, "concurrently": "^9.1.0",

when running "test": "concurrently --kill-others -m 1 -c auto pnpm:lint pnpm:test:unit pnpm:typecheck",
only the lint command works
when moving back to v 8 they all run as expected

[gustavohenke]

Hey.
I had tagged this as a bug, but I remembered it's a different behaviour that I forgot to call out as a breaking change in https://github.com/open-cli-tools/concurrently/releases/tag/v9.0.0. It's related to the usage of the --max-processes/-m flag there.

#433 (comment) explains the thought process.

With the above in mind, I wanted to point out that --kill-others + --max-processes 1 might not make much sense together, but maybe I'm missing your intention with this flag combo.
Did you mean to use --kill-others-on-fail instead? It'd mean something like "don't try running other commands as one of the others is broken anyway".