That says it all. Things took a minor turn towards bad and the wounded had to try to fight off a fire. Bishop decided to get some infections and collapsed traversing an incomplete pool table and no one could rescue him. I tried getting rid of it and still, no bueno.
(http://i.imgur.com/syR5Xdf.png)
From looking at the screenshot, this appears to be WAD and not a bug, though since I cannot tell how the area South of the screenshot is set up, I cannot tell if there is a clear path there.
That being said, from the screenshot provided, from where your pawn "Brown" is, "Brown" cannot carry "Bishop" to a bed.
"Brown" would have to walk through fire in order to carry "Bishop" to a bed.
If you put out the fires, or deconstruct a wall section between the housing area and the common room where "Bishop" is downed, you should be able to rescue "Bishop" after that.
If this does not resolve the problem, uploading a copy of the saved game may help someone diagnose the issue further.
bump, it's because the pawn is unreachable because of temperature, it's possible that it's already fixed in A17