Snapshot of REGRESSIONS based on last night's runs
Merge pull request #509 from bradcray/triage-sep-blc

Snapshot of REGRESSIONS based on last night's runs

Bad:
- memLeaks/promotion failed in --baseline testing

Good:
+ memLeaks/promotion no longer failing in compilation (except in cygwin which lags by several hours)

Business as usual:
* regex cygwin failure back again -- makes sense since re2 was accidentally disabled for a night
* a few other cygwin timeouts have returned; noting them here for now to look at them more before handing off