segfault with sol.solint=0 sol.nchan=0

[revoltek]

setting

sol.solint=0
sol.nchan=0

results in:

 MSReader selecting baselines ...
MSReader
  input MS:       /localwork/fdg/test-dp3/cut.MS
  baseline:       [CR]*&&;!RS208LBA;!RS210LBA;!RS307LBA;!RS310LBA;!RS406LBA;!RS407LBA;!RS409LBA;!RS508LBA;!RS509LBA
  band            0
  startchan:      0  (0)
  nchan:          20  (0)
  ncorrelations:  4
  nbaselines:     378
  first time:     2019/07/02/18:40:24
  last time:      2019/07/02/18:42:02
  ntimes:         50
  time interval:  2.00278
  DATA column:    DATA
  WEIGHT column:  WEIGHT_SPECTRUM
  autoweight:     false
DDECal sol.
  H5Parm:              tec1.h5
  solint:              50
  nchan:               20
  directions:          [[]]
  use model column:    true
  tolerance:           0.0005
  max iter:            300
  flag unconverged:    false
     diverged only:    false
  propagate solutions: true
       converged only: false
  detect stalling:     true
  step size:           0.2
  mode (constraints):  tec
  antennaconstraint:   [[CS002LBA,CS003LBA,CS004LBA,CS005LBA,CS006LBA,CS007LBA]]
  approximate fitter:  true
  only predict:        false
  subtract model:      false
UVWFlagger sol.
  uvm:            [80000,1e+15]
  um:             []
  vm:             []
  wm:             []
  uvlambda:       [-1e+15,100]
  ulambda:        []
  vlambda:        []
  wlambda:        []
  phasecenter:    []
MSUpdater msout.
  MS:             /localwork/fdg/test-dp3/cut.MS
  datacolumn:     DATA
  weightcolumn    WEIGHT_SPECTRUM
  Compressed:     no

  flush:          0

Processing 50 time slots ...

0%Segmentation fault (core dumped)