Crash when time accelerating

[warmist]

Sometimes ksp crashes when time accelerating. In this instance i've captured an asteroid and was starting mining. Full time accelerate crashed ksp.
Logs: https://gist.github.com/warmist/2b6ad7c1a4925241b318a0e79841aa5e

[pleroy]

Decoded stack trace:

physics/discrete_trajectory_body.hpp:322
physics/discrete_trajectory_body.hpp:209
physics/body_centred_body_direction_dynamic_frame_body.hpp:99
ksp_plugin/renderer.cpp:161
ksp_plugin/renderer.cpp:268
ksp_plugin/plugin.cpp:905
ksp_plugin/interface.cpp:679

[warmist]

Also not sure if it's relevant but the game kept lagging (i.e. stopping for half a second) every few minutes.

[pleroy]

The periodic slowdown is probably due to autosaving: the Principia data occupies about 40 MiB, which is going to take a little while to write to the file.

Speaking of which: would you by any chance have the save that was created shortly before the crash? (Around 17:30:30 according to the logs.) The trajectory of the asteroid seems to be wedged, and we don't quite understand how it could get in that state.

[warmist]

Save was a bit older (17:22) and reloading it and playing did not crash again.

[pleroy]

Closing, see the comments in #1569.