Circuit showing bug with Sweep component with a single value and Type=list

test_sweep.sch

<Qucs Schematic 0.0.18>
<Properties>
  <View=0,-51,887,800,1,0,51>
  <Grid=10,10,1>
  <DataSet=test_sweep.dat>
  <DataDisplay=test_sweep.dpl>
  <OpenDisplay=0>
  <Script=test_sweep.m>
  <RunScript=0>
  <showFrame=0>
  <FrameText0=Title>
  <FrameText1=Drawn By:>
  <FrameText2=Date:>
  <FrameText3=Revision:>
</Properties>
<Symbol>
</Symbol>
<Components>
  <GND * 1 60 160 0 0 0 0>
  <R R1 1 240 90 15 -26 0 1 "R1" 1 "26.85" 0 "0.0" 0 "0.0" 0 "26.85" 0 "US" 0>
  <Idc I1 1 60 90 18 -26 0 1 "1 A" 1>
  <.DC DC1 1 60 230 0 43 0 0 "26.85" 0 "0.001" 0 "1 pA" 0 "1 uV" 0 "no" 0 "150" 0 "no" 0 "none" 0 "CroutLU" 0>
  <.SW SW1 1 60 420 0 71 0 0 "DC1" 1 "list" 1 "R1" 1 "5 Ohm" 0 "50 Ohm" 0 "[1]" 1>
  <.SW SW2 0 400 420 0 71 0 0 "DC1" 1 "const" 1 "R1" 1 "5 Ohm" 0 "50 Ohm" 0 "[1]" 1>
</Components>
<Wires>
  <60 40 60 60 "" 0 0 0 "">
  <60 40 240 40 "" 0 0 0 "">
  <240 40 240 60 "" 0 0 0 "">
  <60 120 60 140 "" 0 0 0 "">
  <60 140 240 140 "" 0 0 0 "">
  <240 120 240 140 "" 0 0 0 "">
  <60 140 60 160 "" 0 0 0 "">
  <240 40 240 40 "out" 270 10 0 "">
</Wires>
<Diagrams>
  <Tab 500 277 179 97 3 #c0c0c0 1 00 1 0 1 1 1 0 1 1 1 0 1 1 315 0 225 "" "" "">
	<"out.V" #0000ff 0 3 1 0 0>
  </Tab>
</Diagrams>
<Paintings>
  <Text 50 340 12 #ff0000 0 "Sweep with a single value and\nType=list does NOT work">
  <Text 390 340 12 #ff0000 0 "Sweep with a single value and\nType=const works fine">
</Paintings>