-268.15°C cold gas no longer seems to crash while in pipes, however after it exits a vent and turns into solid form, it seems to crash after a second or two.
Steps to Reproduce
In the save I've attached, simply connect the gas pipe from the Thermo Regulator, to the pipe leading to the vent above. it should crash if the airlocks are closed when the oxygen freezes, but can sometimes be fine if they are open. Otherwise, to do it yourself just loop a Thermo Regulator back into itself till the gas hits -268.15°C, then add a pipe leading to a vent.
This issue has not been confirmed by a developer yet.