I wasted a lot of time debugging a hang in CI in the Windows LUCI tests in a flutter/packages PR, and eventually discovered that it was because I forgot to update some #includes for a file rename (and missed it locally because I still had the file in the old location). This should have failed with a clear error message in CI after a couple of minutes; instead it hung for an hour and a half and provided no useful output.

STR:

• Make a branch from 3b311692c8bb234b9efd7426d3e61aff2bd88d8e in [pigeon] Use a shared generation step for platform_tests/ packages#2823
• Run Windows custom_package_tests master - packages against that branch

Having CI hang with missing log output instead of failing immediately with errors is a huge productivity drain when things go wrong.