KSP crashes every time I load this save.

[rsparkyc]

This is a RP-0 install. I'm on a mac, so I had to use lamont's build from here: https://github.com/lamont-granquist/Principia/releases/tag/catalan-macosx-3
Archive.zip

[pleroy]

Stack with 2017052520-Catalan-219-g2563cb5c5a80e5b47693a0e43d90bfa1ddd0694d:

    @   000007FEF2F84E99  	google::LogMessageFatal::~LogMessageFatal [0x000007FEF2F84E98+104] (google\glog\src\logging.cc:2034)
    @   000007FEF2EC32B2  	principia::integrators::internal_symplectic_runge_kutta_nyström_integrator::SymplecticRungeKuttaNyströmIntegrator<principia::geometry::internal_point::Point<principia::geometry::internal_grassmann::Multivector<principia::quantities::internal_quantities::Q [0x000007FEF2EC32B1+513] (principia\integrators\symplectic_runge_kutta_nyström_integrator_body.hpp:49)
    @   000007FEF2EC5389  	principia::integrators::internal_symmetric_linear_multistep_integrator::SymmetricLinearMultistepIntegrator<principia::geometry::internal_point::Point<principia::geometry::internal_grassmann::Multivector<principia::quantities::internal_quantities::Quantity [0x000007FEF2EC5388+648] (principia\integrators\symmetric_linear_multistep_integrator_body.hpp:290)
    @   000007FEF2EC0E2D  	principia::integrators::internal_symmetric_linear_multistep_integrator::SymmetricLinearMultistepIntegrator<principia::geometry::internal_point::Point<principia::geometry::internal_grassmann::Multivector<principia::quantities::internal_quantities::Quantity [0x000007FEF2EC0E2C+172] (integrators\symmetric_linear_multistep_integrator_body.hpp:41)
    @   000007FEF2F35C30  	principia::physics::internal_ephemeris::Ephemeris<principia::geometry::internal_frame::Frame<enum principia::serialization::Frame_PluginTag,7,1> >::FlowWithFixedStep [0x000007FEF2F35C2F+319] (principia\physics\ephemeris_body.hpp:530)
    @   000007FEF2EFFA94  	principia::ksp_plugin::internal_pile_up::PileUp::AdvanceTime [0x000007FEF2EFFA93+883] (principia\ksp_plugin\pile_up.cpp:152)
    @   000007FEF2F2140A  	principia::ksp_plugin::internal_plugin::Plugin::AdvanceParts [0x000007FEF2F21409+313] (principia\ksp_plugin\plugin.cpp:540)
    @   000007FEF2F219D7  	principia::ksp_plugin::internal_plugin::Plugin::AdvanceTime [0x000007FEF2F219D6+646] (principia\ksp_plugin\plugin.cpp:595)
    @   000007FEF2ECBC4B  	principia__AdvanceTime [0x000007FEF2ECBC4A+170] (principia\ksp_plugin\interface.cpp:173)
    @   0000000016C4D1BD  	(No symbol) [0x0000000016C4D1BC]

[eggrobin]

For future reference: the FATAL failure itself:

F0615 23:16:30.734341 52753344 symplectic_runge_kutta_nyström_integrator_body.hpp:49] Check failed: current_state.time.value < t_final (-1.54628893389484382e+09 s vs. -1.54628893393484378e+09 s)