https://bugs.winehq.org/show_bug.cgi?id=48142
--- Comment #6 from François Gouget fgouget@codeweavers.com --- (In reply to Vincent Povirk from comment #5)
That could be it. In every failing case, it's <tag>-32 followed by <tag>-64. The -32 succeeds and the -64 fails.
Yes, the non-TestBot machines (so cw-* and fg-*) first run the 32 bit WineTest and then run the 64 bit WineTest. That's because for these machines a "revert" means restoring the Windows partition from backup so it's a bit on the heavy side.
That's not the case for the TestBot VMs. Those perform a revert between each WineTest run.
That said the tests should try not to completely break the test environment: if a 32 bit test unit kills explorer.exe that could just as well impact the other 32 bit test units that follow.