This build failed while compiling setup_lib.installer_crash_reporting.obj

https://build.chromium.org/p/chromium/builders/Win/builds/45068

It complains about kasko_features.h missing. This is generated by the build flag system, and appears to be flake as the previous and next builds both succeeded, with nothing touching any code at all related to Crashpad or Kasko. The kasko_features is a public_dep of kasko, which is a public dep of crash, so the particular setup_lib build step should be waiting for the header file to be generated.

Is Kasko using the build flag features incorrectly, or is there problem with the GN implementation of build flags?

This has happened a couple of times sporadically over the last couple of months, specifically with kasko_features.h. I'm not aware of it happening with other build flag header files, but that doesn't mean it hasn't happened.

NB. Kasko is disappearing "real soon now" (being ripped out of SyzyASAN, the last piece of code depending on it), which will mitigate this particular issue in short order.