Segfault in case of Material at beginning of beamline

Error output:
OPAL> 
OPAL> --- BEGIN FIELD LIST ---------------------------------------------------------------
OPAL> 
OPAL> --- 0.2 m -- 0.200228 m --  has surface physics ------------------------------------
OPAL> DMA_DEG1
OPAL> --- 0.200228 m -- 1.20023 m -- -----------------------------------------------------
OPAL> D1
OPAL> 
OPAL> --- END FIELD LIST -----------------------------------------------------------------
OPAL> 
[opalrunner:18498] *** Process received signal ***
[opalrunner:18498] Signal: Segmentation fault (11)
[opalrunner:18498] Signal code: Address not mapped (1)
[opalrunner:18498] Failing at address: 0x30
[opalrunner:18498] [ 0] /lib64/libpthread.so.0[0x32ea20f7e0]
[opalrunner:18498] [ 1] opal(_ZN12OpalBeamline14switchElementsERKdS1_S1_RKb+0x1cf)[0xf1829f]
[opalrunner:18498] [ 2] opal[0x10758bd]
[opalrunner:18498] [ 3] opal(_ZN16ParallelTTracker21executeDefaultTrackerEv+0x2c0)[0x107c520]
[opalrunner:18498] [ 4] opal(_ZN16ParallelTTracker7executeEv+0x1f)[0x107d35f]
[opalrunner:18498] [ 5] opal(_ZN8TrackRun7executeEv+0x751)[0x1043b51]
[opalrunner:18498] [ 6] opal(_ZNK10OpalParser7executeEP6ObjectRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE+0x35)[0xcac6c5]
[opalrunner:18498] [ 7] opal(_ZNK10OpalParser11parseActionER9Statement+0x11a)[0xcb062a]
[opalrunner:18498] [ 8] opal(_ZNK10OpalParser5parseER9Statement+0x186)[0xcb0076]
[opalrunner:18498] [ 9] opal(_ZNK10OpalParser3runEv+0x2c)[0xcb158c]
[opalrunner:18498] [10] opal(_ZN8TrackCmd7executeEv+0x343)[0xd63cb3]
[opalrunner:18498] [11] opal(_ZNK10OpalParser7executeEP6ObjectRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE+0x35)[0xcac6c5]
[opalrunner:18498] [12] opal(_ZNK10OpalParser11parseActionER9Statement+0x11a)[0xcb062a]
[opalrunner:18498] [13] opal(_ZNK10OpalParser5parseER9Statement+0x186)[0xcb0076]
[opalrunner:18498] [14] opal(_ZNK10OpalParser3runEv+0x2c)[0xcb158c]
[opalrunner:18498] [15] opal(_ZNK10OpalParser3runEP11TokenStream+0x6a)[0xcb0a8a]
[opalrunner:18498] [16] opal(main+0x8e8)[0xc3f858]
[opalrunner:18498] [17] /lib64/libc.so.6(__libc_start_main+0xfd)[0x32e961ed1d]
[opalrunner:18498] [18] opal[0xc36cb5]
[opalrunner:18498] *** End of error message ***
--------------------------------------------------------------------------
mpirun noticed that process rank 0 with PID 18498 on node opalrunner exited on signal 11 (Segmentation fault).
We doesn't crash when we add a drift in front of the material.