Phase 9b's fixture installs spawn ephemeral daemons whose mapped
generation backings pin files in the fixture HOME; the cleanup rm then
races the daemon's asynchronous drain and loses nondeterministically on
Windows (Device or resource busy on a generations backing — the same
class the final-phase daemon retirement already fixed for the smoke
cache, two rounds green then one red on identical code). The retirement
is now a shared helper with a cheap not-running probe, called before
every fixture cleanup that follows an install and by the final phase; a
daemon that will not retire stays a hard failure.
The 9b fixtures also route LOCALAPPDATA under the fixture HOME: their
installs staged launcher pairs into the real runner profile, outside
the fixture's isolation and the harness's cleanup reach.
Verified: full VM smoke green end to end (all 9b subphases, phase 17
through the shared helper).
Signed-off-by: Martin Vogel <martin.vogel.tech@gmail.com>
Martin Vogel
e4400b6f49