I have a build which takes about a half-hour to run on Windows, and five minutes on MacOS.
I am running it as a parallel composition build step, one sub-step run on each platform.

If the Mac OS build fails, I have to wait for the Windows build to complete before I can see the results of the failed Mac step.
I would like to just cancel the build and look at what has completed so far.

However, if I cancel the build, all that ends up in the log is the cancellation message.