Simulink Crashes on Linux when Fast Restart is Turned on

I've created a Simulink S-function on both my Windows and Linux machine. When I run it on my Linux installation of Simulink everything works just fine. But if I turn Fast Restart on and run it, it will crash with the error

free(): double free detected in tcache 2

shortly after exiting the static void mdlStart( SimStruct *S ) function in my s-function .c file. I can't find any documentation or posts talking about this problem. I am able to run it with Fast Restart on Windows, and I am able to run it on Linux without Fast Restart, so I don't believe there's any issue with my S-function itself. I'm pasting the crash logs below. Any help would be greatly appreciated! If I can't run with Fast Restart on my Linux machine it severly reduces its usefulness since I was planning on using it for large batch runs.

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MATLAB Log File

------------------------------------------------

--------------------------------------------------------------------------------

abort() detected at 2024-12-17 16:46:22 -0700

--------------------------------------------------------------------------------

Configuration:

Crash Decoding : Disabled - No sandbox or build area path

Crash Mode : continue (default)

Default Encoding : UTF-8

Deployed : false

Desktop Environment : GNOME

GNU C Library : 2.28 stable

Graphics Driver : Unknown software

Graphics Text Issue Info : xmin=0.000000, ymin=-3.000000, xmax=16.500000, ymax=9.750000

Graphics card 1 : 0x10de ( 0x10de ) 0x2571 Version 0.0.0.0 (0-0-0)

Graphics card 2 : 0x8086 ( 0x8086 ) 0xa780 Version 0.0.0.0 (0-0-0)

Java Version : Java 1.8.0_202-b08 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode

MATLAB Architecture : glnxa64

MATLAB Entitlement ID : 808735

MATLAB Root : /usr/local/MATLAB/R2021b

MATLAB Version : 9.11.0.1769968 (R2021b)

OpenGL : software

Operating System : Linux 5.15.0-200.131.27.1.el8uek.x86_64 #2 SMP Wed Nov 22 18:08:57 PST 2023 x86_64

Process ID : 1279684

Processor ID : x86 Family 6 Model 183 Stepping 1, GenuineIntel

Session Key : d8d58905-aba4-4d3d-9b6f-53a6df1116a4

Static TLS mitigation : Enabled: Full

Window System : The X.Org Foundation (12011000), display :2

Fault Count: 1

Abnormal termination:

abort()

Current Thread: 'MCR 0 interpret' id 23451729393408

Register State (from fault):

RAX = 0000000000000000 RBX = 0000000000000006

RCX = 0000155553f7da4f RDX = 0000000000000000

RSP = 0000155447ff5320 RBP = 0000155447ff5670

RSI = 0000155447ff5320 RDI = 0000000000000002

R8 = 0000000000000000 R9 = 0000155447ff5320

R10 = 0000000000000008 R11 = 0000000000000246

R12 = 0000000000001000 R13 = 0000155447ff5590

R14 = 0000000000000010 R15 = 0000155288d22000

RIP = 0000155553f7da4f EFL = 0000000000000246

CS = 0033 FS = 0000 GS = 0000

Stack Trace (from fault):

[ 0] 0x0000155553f7da4f /lib64/libc.so.6+00322127 gsignal+00000271

[ 1] 0x0000155553f50db5 /lib64/libc.so.6+00138677 abort+00000295

[ 2] 0x0000155553fc0067 /lib64/libc.so.6+00594023

[ 3] 0x0000155553fc71bc /lib64/libc.so.6+00623036

[ 4] 0x0000155553fc8f2d /lib64/libc.so.6+00630573

[ 5] 0x00001551b917631d /usr/local/MATLAB/R2021b/bin/glnxa64/builtins/sl_graphical_classes/../../../../bin/glnxa64/libmwSimulinkBlock.so+02175773 _ZN6SlDimsD1Ev+00000045

[ 6] 0x00001551b9176310 /usr/local/MATLAB/R2021b/bin/glnxa64/builtins/sl_graphical_classes/../../../../bin/glnxa64/libmwSimulinkBlock.so+02175760 _ZN6SlDimsD1Ev+00000032

[ 7] 0x00001551b9176310 /usr/local/MATLAB/R2021b/bin/glnxa64/builtins/sl_graphical_classes/../../../../bin/glnxa64/libmwSimulinkBlock.so+02175760 _ZN6SlDimsD1Ev+00000032

[ 8] 0x00001551b9176310 /usr/local/MATLAB/R2021b/bin/glnxa64/builtins/sl_graphical_classes/../../../../bin/glnxa64/libmwSimulinkBlock.so+02175760 _ZN6SlDimsD1Ev+00000032

[ 9] 0x00001551b9176310 /usr/local/MATLAB/R2021b/bin/glnxa64/builtins/sl_graphical_classes/../../../../bin/glnxa64/libmwSimulinkBlock.so+02175760 _ZN6SlDimsD1Ev+00000032

[ 10] 0x00001551b9176310 /usr/local/MATLAB/R2021b/bin/glnxa64/builtins/sl_graphical_classes/../../../../bin/glnxa64/libmwSimulinkBlock.so+02175760 _ZN6SlDimsD1Ev+00000032

[ 11] 0x00001551b9176310 /usr/local/MATLAB/R2021b/bin/glnxa64/builtins/sl_graphical_classes/../../../../bin/glnxa64/libmwSimulinkBlock.so+02175760 _ZN6SlDimsD1Ev+00000032

[ 12] 0x00001551b9176310 /usr/local/MATLAB/R2021b/bin/glnxa64/builtins/sl_graphical_classes/../../../../bin/glnxa64/libmwSimulinkBlock.so+02175760 _ZN6SlDimsD1Ev+00000032

[ 13] 0x00001551b9176310 /usr/local/MATLAB/R2021b/bin/glnxa64/builtins/sl_graphical_classes/../../../../bin/glnxa64/libmwSimulinkBlock.so+02175760 _ZN6SlDimsD1Ev+00000032

[ 14] 0x00001551b9176310 /usr/local/MATLAB/R2021b/bin/glnxa64/builtins/sl_graphical_classes/../../../../bin/glnxa64/libmwSimulinkBlock.so+02175760 _ZN6SlDimsD1Ev+00000032

[ 15] 0x00001551b9176310 /usr/local/MATLAB/R2021b/bin/glnxa64/builtins/sl_graphical_classes/../../../../bin/glnxa64/libmwSimulinkBlock.so+02175760 _ZN6SlDimsD1Ev+00000032

[ 16] 0x00001551b9176310 /usr/local/MATLAB/R2021b/bin/glnxa64/builtins/sl_graphical_classes/../../../../bin/glnxa64/libmwSimulinkBlock.so+02175760 _ZN6SlDimsD1Ev+00000032

[ 17] 0x00001551b9176310 /usr/local/MATLAB/R2021b/bin/glnxa64/builtins/sl_graphical_classes/../../../../bin/glnxa64/libmwSimulinkBlock.so+02175760 _ZN6SlDimsD1Ev+00000032

[ 18] 0x00001551b9176310 /usr/local/MATLAB/R2021b/bin/glnxa64/builtins/sl_graphical_classes/../../../../bin/glnxa64/libmwSimulinkBlock.so+02175760 _ZN6SlDimsD1Ev+00000032

[ 19] 0x00001551b9176310 /usr/local/MATLAB/R2021b/bin/glnxa64/builtins/sl_graphical_classes/../../../../bin/glnxa64/libmwSimulinkBlock.so+02175760 _ZN6SlDimsD1Ev+00000032

[ 20] 0x00001551b9176310 /usr/local/MATLAB/R2021b/bin/glnxa64/builtins/sl_graphical_classes/../../../../bin/glnxa64/libmwSimulinkBlock.so+02175760 _ZN6SlDimsD1Ev+00000032

[ 21] 0x000015519a86b256 /usr/local/MATLAB/R2021b/bin/glnxa64/sl_proxy/sl_proxy_desktop/../../../../bin/glnxa64/libmwsl_prm_engine.so+03641942

[ 22] 0x000015519a86c70a /usr/local/MATLAB/R2021b/bin/glnxa64/sl_proxy/sl_proxy_desktop/../../../../bin/glnxa64/libmwsl_prm_engine.so+03647242 _Z31slPackSimulinkDataIntoAnMxArrayPKvPK8SLRootBDP21_slDataTypeAccess_tagibPK6SlDimsPK7SLBlockPKlb+00001114

[ 23] 0x000015519ea86951 /usr/local/MATLAB/R2021b/bin/glnxa64/sl_proxy/sl_proxy_desktop/../../../../bin/glnxa64/libmwsimulink.so+25766225

[ 24] 0x000015519ea86ad7 /usr/local/MATLAB/R2021b/bin/glnxa64/sl_proxy/sl_proxy_desktop/../../../../bin/glnxa64/libmwsimulink.so+25766615

[ 25] 0x000015519ea809e6 /usr/local/MATLAB/R2021b/bin/glnxa64/sl_proxy/sl_proxy_desktop/../../../../bin/glnxa64/libmwsimulink.so+25741798

[ 26] 0x000015519ea8285e /usr/local/MATLAB/R2021b/bin/glnxa64/sl_proxy/sl_proxy_desktop/../../../../bin/glnxa64/libmwsimulink.so+25749598

[ 27] 0x000015519e77cbbc /usr/local/MATLAB/R2021b/bin/glnxa64/sl_proxy/sl_proxy_desktop/../../../../bin/glnxa64/libmwsimulink.so+22580156

[ 28] 0x000015519ea8b773 /usr/local/MATLAB/R2021b/bin/glnxa64/sl_proxy/sl_proxy_desktop/../../../../bin/glnxa64/libmwsimulink.so+25786227

[ 29] 0x000015519ea8bc50 /usr/local/MATLAB/R2021b/bin/glnxa64/sl_proxy/sl_proxy_desktop/../../../../bin/glnxa64/libmwsimulink.so+25787472

[ 30] 0x000015519ea8f0a7 /usr/local/MATLAB/R2021b/bin/glnxa64/sl_proxy/sl_proxy_desktop/../../../../bin/glnxa64/libmwsimulink.so+25800871

[ 31] 0x000015519eab0355 /usr/local/MATLAB/R2021b/bin/glnxa64/sl_proxy/sl_proxy_desktop/../../../../bin/glnxa64/libmwsimulink.so+25936725

[ 32] 0x000015519eab0725 /usr/local/MATLAB/R2021b/bin/glnxa64/sl_proxy/sl_proxy_desktop/../../../../bin/glnxa64/libmwsimulink.so+25937701

[ 33] 0x000015519e77cbbc /usr/local/MATLAB/R2021b/bin/glnxa64/sl_proxy/sl_proxy_desktop/../../../../bin/glnxa64/libmwsimulink.so+22580156

[ 34] 0x000015519ea8b773 /usr/local/MATLAB/R2021b/bin/glnxa64/sl_proxy/sl_proxy_desktop/../../../../bin/glnxa64/libmwsimulink.so+25786227

[ 35] 0x000015519ea8bc50 /usr/local/MATLAB/R2021b/bin/glnxa64/sl_proxy/sl_proxy_desktop/../../../../bin/glnxa64/libmwsimulink.so+25787472

[ 36] 0x000015519ea8f0a7 /usr/local/MATLAB/R2021b/bin/glnxa64/sl_proxy/sl_proxy_desktop/../../../../bin/glnxa64/libmwsimulink.so+25800871

[ 37] 0x000015519ea9eac3 /usr/local/MATLAB/R2021b/bin/glnxa64/sl_proxy/sl_proxy_desktop/../../../../bin/glnxa64/libmwsimulink.so+25864899

[ 38] 0x000015519eaabb5a /usr/local/MATLAB/R2021b/bin/glnxa64/sl_proxy/sl_proxy_desktop/../../../../bin/glnxa64/libmwsimulink.so+25918298

[ 39] 0x000015519e9d3f9e /usr/local/MATLAB/R2021b/bin/glnxa64/sl_proxy/sl_proxy_desktop/../../../../bin/glnxa64/libmwsimulink.so+25034654

[ 40] 0x000015519ea0feba /usr/local/MATLAB/R2021b/bin/glnxa64/sl_proxy/sl_proxy_desktop/../../../../bin/glnxa64/libmwsimulink.so+25280186

[ 41] 0x000015519ea10414 /usr/local/MATLAB/R2021b/bin/glnxa64/sl_proxy/sl_proxy_desktop/../../../../bin/glnxa64/libmwsimulink.so+25281556

[ 42] 0x000015519e9b48c7 /usr/local/MATLAB/R2021b/bin/glnxa64/sl_proxy/sl_proxy_desktop/../../../../bin/glnxa64/libmwsimulink.so+24905927

[ 43] 0x000015519e9adff0 /usr/local/MATLAB/R2021b/bin/glnxa64/sl_proxy/sl_proxy_desktop/../../../../bin/glnxa64/libmwsimulink.so+24879088

[ 44] 0x000015519ea01c77 /usr/local/MATLAB/R2021b/bin/glnxa64/sl_proxy/sl_proxy_desktop/../../../../bin/glnxa64/libmwsimulink.so+25222263

[ 45] 0x000015519e2a1c94 /usr/local/MATLAB/R2021b/bin/glnxa64/sl_proxy/sl_proxy_desktop/../../../../bin/glnxa64/libmwsimulink.so+17489044

[ 46] 0x000015519e104403 /usr/local/MATLAB/R2021b/bin/glnxa64/sl_proxy/sl_proxy_desktop/../../../../bin/glnxa64/libmwsimulink.so+15795203 _Z14slFullSimulateiPP11mxArray_tagiS1_+00000195

[ 47] 0x000015519f285b60 /usr/local/MATLAB/R2021b/bin/glnxa64/builtins/sl_proxy_interface/../../../../bin/glnxa64/libmwsl_proxy_interface.so+00023392

[ 48] 0x00001554881508fa /usr/local/MATLAB/R2021b/bin/glnxa64/libmwbuiltin.so+00076026 _ZNK9MathWorks7builtin10BuiltinFcn6invokeEiPP11mxArray_tagiS4_NS1_18VariantsToConsiderE+00000106

[ 49] 0x0000155488ad5b4e /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_dispatcher.so+00764750

[ 50] 0x0000155488ad8938 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_dispatcher.so+00776504

[ 51] 0x0000155488ab8e1a /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_dispatcher.so+00646682

[ 52] 0x0000155488ab90e1 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_dispatcher.so+00647393 _ZN18Mfh_MATLAB_fn_impl8dispatchEiPSt10unique_ptrI11mxArray_tagN6matrix6detail17mxDestroy_deleterEEiPPS1_+00000033

[ 53] 0x00001554712e9f54 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+12611412

[ 54] 0x00001554712ec5f2 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+12621298

[ 55] 0x000015547144626d /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+14037613

[ 56] 0x0000155471437e6b /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+13979243

[ 57] 0x00001554713c6e6d /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+13516397

[ 58] 0x00001554713c6ef0 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+13516528

[ 59] 0x0000155470e8ed40 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+08043840

[ 60] 0x0000155470e90d64 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+08052068

[ 61] 0x0000155470e8ddf1 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+08039921

[ 62] 0x0000155470e83ca5 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+07998629

[ 63] 0x0000155470e84191 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+07999889

[ 64] 0x0000155470e8d63a /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+08037946

[ 65] 0x0000155470e8d736 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+08038198

[ 66] 0x0000155470fbbd7b /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+09276795

[ 67] 0x0000155470fbeca0 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+09288864

[ 68] 0x00001554711ee836 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+11581494

[ 69] 0x00001554712d7e9d /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+12537501

[ 70] 0x00001554712d9315 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+12542741

[ 71] 0x0000155488b48df0 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_dispatcher.so+01236464 _ZN8Mfh_file20dispatch_file_commonEMS_FviPP11mxArray_tagiS2_EiS2_iS2_+00000208

[ 72] 0x0000155488b4a3f3 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_dispatcher.so+01242099

[ 73] 0x0000155488b4a8c1 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_dispatcher.so+01243329 _ZN8Mfh_file8dispatchEiPSt10unique_ptrI11mxArray_tagN6matrix6detail17mxDestroy_deleterEEiPPS1_+00000033

[ 74] 0x00001554712e9f54 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+12611412

[ 75] 0x00001554712ec5f2 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+12621298

[ 76] 0x000015547144626d /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+14037613

[ 77] 0x0000155471437faa /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+13979562

[ 78] 0x00001554713c6e6d /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+13516397

[ 79] 0x00001554713c6f40 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+13516608

[ 80] 0x0000155470e8ed40 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+08043840

[ 81] 0x0000155470e90d64 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+08052068

[ 82] 0x0000155470e8ddf1 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+08039921

[ 83] 0x0000155470e83ca5 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+07998629

[ 84] 0x0000155470e84191 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+07999889

[ 85] 0x0000155470e8d63a /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+08037946

[ 86] 0x0000155470e8d736 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+08038198

[ 87] 0x0000155470fbbd7b /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+09276795

[ 88] 0x0000155470fbeca0 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+09288864

[ 89] 0x00001554711ee836 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+11581494

[ 90] 0x000015547119a7cc /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+11237324

[ 91] 0x000015547119b48c /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+11240588

[ 92] 0x000015547123c9e4 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+11901412

[ 93] 0x000015547123cba9 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwm_lxe.so+11901865

[ 94] 0x0000155488daf679 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwiqm.so+00587385

[ 95] 0x0000155488e0eed2 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwiqm.so+00978642 _ZN3iqm14UserEvalPlugin7executeEP15inWorkSpace_tag+00000642

[ 96] 0x0000155488dea3af /usr/local/MATLAB/R2021b/bin/glnxa64/libmwiqm.so+00828335

[ 97] 0x0000155488df5f26 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwiqm.so+00876326

[ 98] 0x0000155488dba706 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwiqm.so+00632582

[ 99] 0x000015550c095c02 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwbridge.so+00302082

[100] 0x000015550c096543 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwbridge.so+00304451

[101] 0x000015550c09c7f2 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwbridge.so+00329714 _Z22mnGetCommandLineBufferbRbN7mwboost8optionalIKP15inWorkSpace_tagEEbRKNS0_9function2IN6mlutil14cmddistributor17inExecutionStatusERKNSt7__cxx1112basic_stringIDsSt11char_traitsIDsESaIDsEEES4_EE+00000274

[102] 0x000015550c09ca92 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwbridge.so+00330386 _Z8mnParserv+00000482

[103] 0x0000155488c959d7 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwmcr.so+00940503

[104] 0x00001555551e1be0 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwmvm.so+02825184 _ZNK7mwboost9function0IvEclEv+00000032

[105] 0x00001555551e9740 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwmvm.so+02856768 _ZN14cmddistributor15PackagedTaskIIP10invokeFuncIN7mwboost8functionIFvvEEEEENS2_10shared_ptrINS2_13unique_futureIDTclfp_EEEEEERKT_+00000048

[106] 0x00001555551e97e8 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwmvm.so+02856936 _ZNSt17_Function_handlerIFN7mwboost3anyEvEZN14cmddistributor15PackagedTaskIIP10createFuncINS0_8functionIFvvEEEEESt8functionIS2_ET_EUlvE_E9_M_invokeERKSt9_Any_data+00000024

[107] 0x0000155488e0a8bb /usr/local/MATLAB/R2021b/bin/glnxa64/libmwiqm.so+00960699 _ZN3iqm18PackagedTaskPlugin7executeEP15inWorkSpace_tag+00000091

[108] 0x0000155488c93695 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwmcr.so+00931477

[109] 0x0000155488dea3af /usr/local/MATLAB/R2021b/bin/glnxa64/libmwiqm.so+00828335

[110] 0x0000155488db85bc /usr/local/MATLAB/R2021b/bin/glnxa64/libmwiqm.so+00624060

[111] 0x0000155488db9050 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwiqm.so+00626768

[112] 0x0000155488c7dace /usr/local/MATLAB/R2021b/bin/glnxa64/libmwmcr.so+00842446

[113] 0x0000155488c7e0ec /usr/local/MATLAB/R2021b/bin/glnxa64/libmwmcr.so+00844012

[114] 0x0000155488c7e362 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwmcr.so+00844642

[115] 0x00001555536c18a7 /usr/local/MATLAB/R2021b/bin/glnxa64/libmwboost_thread.so.1.72.0+00063655

[116] 0x00001555548971df /lib64/libpthread.so.0+00033247

[117] 0x0000155553f68d83 /lib64/libc.so.6+00236931 clone+00000067

[Debadipto]

The error message "free(): double free detected in tcache 2" typically occurs when a program tries to free the same memory location more than once, which can lead to undefined behavior and crashes. Sharing your S-function code along with the setup (i.e. the overall Simulink model and your workflow) could be helpful in locating the cause of the crash.

Meanwhile, you can try using Valgrind on Linux to obtain any information about invalid memory accesses and memory leaks in your program.

[Walter Roberson]

Possibly related: https://www.mathworks.com/matlabcentral/answers/2137048-problem-with-fast-restart-and-simulink-scenario-reader

[Walter Roberson]

If it is a large model, then see https://www.mathworks.com/support/bugreports/details/2782643

[Parker]

After updating to R2021b Update 7 I don't seem to be encountering the issue anymore, so I think it is related to that bug report. Thank you for the help.