Adding a test for speculative wait case

When Who What
2020-03-24 19:13:30 Andres Freund (andresfreund) Closed in commitfest 2020-03 with status: Committed
2020-03-24 19:13:30 Andres Freund (andresfreund) Changed committer to andresfreund
2020-02-01 12:43:08 Tomas Vondra (fuzzycz) Closed in commitfest 2020-01 with status: Moved to next CF
2019-11-29 06:24:55 Michael Paquier (michael-kun) Closed in commitfest 2019-11 with status: Moved to next CF
2019-09-30 18:53:54 Álvaro Herrera (alvherre) Closed in commitfest 2019-09 with status: Moved to next CF
2019-07-03 17:51:07 Ashwin Agrawal (ashwinstar) Changed authors to Ashwin Agrawal (ashwinstar), Melanie Plageman (melanieplageman)
2019-07-03 17:50:37 Ashwin Agrawal (ashwinstar) Attached mail thread CAAKRu_a7hbyrk=wveHYhr4LbcRnRCG=yPUVoQYB9YO1CdUBE9Q@mail.gmail.com
2019-07-03 17:50:37 Ashwin Agrawal (ashwinstar) Created patch record