We've previously noted that the Bastion changes on the PTR have seemed to make him feel a bit broken - especially the damage reduction while in Sentry mode.
A Reddit user by the name of Squidblimp tested all of the things that Bastion can now survive while healing, that he wasn't able to before:
Reaper's entire ultimate.
Reaper's entire 8 shot clip (if Bastion makes sure to heal slightly before he shoots, to keep his health in armor).
Pharah's entire rocket clip.
Torbjorn's Level 2 Turret can NEVER kill Bastion in Sentry mode. (He can literally tank it forever and never die by healing periodically. Tanked it for an entire minute and was at full 300 HP at the end.)
Torbjorn's Molten Core Turret (until healing runs out, at which point Bastion can turn and kill it).
Symmetra's laser does literally zero damage until healing runs out.
6 Symmetra turrets.
Genji's entire ultimate from start to finish if Genji only attacks Bastion (he only loses about a third HP).
Soldier's entire clip + rockets.
Tracer's bullets can literally be tanked forever until healing runs out.
McCree's ultimate, if he fires it right as the circle disappears (leaves Bastion with 60HP).
Zarya at 100 charges firing her entire laser clip.
Junkrat's entire clip.
Here's some video evidence of the above, starting at 8:35:
It's worth noting that there are still burst damage abilities that he can't survive, though. Here's a full list of those abilities:
Soldier's entire ultimate (2 full clips of bullets + rockets)!
Bastion in Tank and Sentry mode.
McCree's ultimate if you wait slightly longer.
Roadhog hook into a shot, because it pulls you out of Sentry Mode.
Reinhardt charges into swing, because it pulls you out of Sentry Mode.
Tracer's ultimate + her entire clip.
Hanzo's ultimate (although he almost actually lives it).
It seems like Roadhog and Reinhardt, in general, are going to be great counters to Bastion in the upcoming patch - as will D.Va and Hanzo.
Dustin Steiner has seen esports from nearly every angle, from tournament administration to live event coverage. He has worked in the space for over six years for outlets such as the Capcom Pro Tour, eSportsMax, ESFI World, Evil Geniuses and GameZone.