Commit a20b8c2199d2cf3e9a7c3e58f5842eef2c395ec9
2018-10-25T14:26:28
ci: fail on test failures PowerShell can _read_ top-level variables in functions, but cannot _update_ top-level variables in functions unless they're explicitly prefixed with `$global`. (cherry picked from commit 0e26717a57169d1222bdebef3f0caa728fd85b75)