Segmentation fault during simulation of rectifier using negative Start Time

[christiankral]

Description

When I simulate the included thyristor bridge model using a current source, the simulation works OK if the simulation Start Time is set to zero. If I pick the Start Time = -1s

the simulation process crashes:

Process crashed Simulation process failed. Exited with code 11.
Process crashed

Limited backtrace at point of segmentation fault
/lib/x86_64-linux-gnu/libpthread.so.0(+0x14420)[0x7fac173f5420]
/usr/bin/../lib/x86_64-linux-gnu/omc/libSimulationRuntimeC.so(cleanValueListbyTime+0x39)[0x7fac1b39e3d6]
/usr/bin/../lib/x86_64-linux-gnu/omc/libSimulationRuntimeC.so(cleanUpOldValueListAfterEvent+0x42)[0x7fac1b3a0f76]
/tmp/OpenModelica_christian/OMEdit/B2/B2(B2_performSimulation+0x8df)[0x407f2f]
/usr/bin/../lib/x86_64-linux-gnu/omc/libSimulationRuntimeC.so(solver_main+0x3b9)[0x7fac1b3ac14b]
/usr/bin/../lib/x86_64-linux-gnu/omc/libSimulationRuntimeC.so(+0x1f9b33)[0x7fac1b401b33]
/usr/bin/../lib/x86_64-linux-gnu/omc/libSimulationRuntimeC.so(startNonInteractiveSimulation+0xb56)[0x7fac1b400f62]
/usr/bin/../lib/x86_64-linux-gnu/omc/libSimulationRuntimeC.so(_main_SimulationRuntime+0x72)[0x7fac1b403230]
/tmp/OpenModelica_christian/OMEdit/B2/B2(main+0x1f2)[0x40abf4]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3)[0x7fac17211083]
/tmp/OpenModelica_christian/OMEdit/B2/B2(_start+0x2e)[0x40758e]

Steps to Reproduce

Simulate the following model:

within ;
model B2
  import Modelica.Units.SI;
  import Modelica.Constants.pi;
  extends
    Modelica.Electrical.PowerConverters.Examples.ACDC.ExampleTemplates.ThyristorBridge2Pulse(
      Vrms=100,
      sinevoltage(startTime=-1));
  extends Modelica.Icons.Example;
  parameter SI.Current id = 5 "Load current";
  Modelica.Electrical.Analog.Sources.ConstantCurrent constantCurrent(I=id)
    annotation (Placement(transformation(
        extent={{-10,-10},{10,10}},
        rotation=270,
        origin={20,10})));
equation
  connect(constantCurrent.p, voltagesensor.p) annotation (Line(points={{20,20},{
          20,40},{50,40},{50,20}}, color={0,0,255}));
  connect(constantCurrent.n, currentSensor.p)
    annotation (Line(points={{20,0},{20,-40},{10,-40}}, color={0,0,255}));
  annotation (experiment(
      StartTime=-1,
      StopTime=0.02,
      Tolerance=1e-06, Interval = 0.0002), uses(Modelica(version="4.0.0")));
end B2;

Additional comment

The simulation did not crash if I simulate Modelica.Blocks.Examples.Filter with Start Time = -1s.

Version and OS

Connected to OpenModelica 1.20.0~dev-222-g2c88f03
Connected to OMSimulator Linux Mint 20.3, 64bit

[casella]

Given the MWE and the stack trace, finding the cause of the problem shouldn't be too difficult. @AnHeuermann, @phannebohm please have a look at your earliest convenience.

[casella]

Thanks @phannebohm! ❤️

@christiankral please check with the next nightly build and confirm that all works well now.

[christiankral]

I confirm that everything works as expected. Thanks!