added test

refs ticket:4850

Belonging to [master]:
  - OpenModelica/OMCompiler#2332
  - OpenModelica/OpenModelica-testsuite#910

simulation/modelica/commonSubExp/testBug4850.mos

@@ -0,0 +1,34 @@
+// name: cseSum
+// keywords: cse
+// status: correct
+
+loadString("
+function foo
+  input Real[:] x;
+  output Real[:] y = x;
+end foo;
+
+model foobar
+  Real y = sum(foo({time, time*2}));
+end foobar;
+");
+getErrorString();
+
+simulate(foobar);
+getErrorString();
+
+val(y, {0,1});
+
+// Result:
+// true
+// ""
+// record SimulationResult
+//     resultFile = "foobar_res.mat",
+//     simulationOptions = "startTime = 0.0, stopTime = 1.0, numberOfIntervals = 500, tolerance = 1e-06, method = 'dassl', fileNamePrefix = 'foobar', options = '', outputFormat = 'mat', variableFilter = '.*', cflags = '', simflags = ''",
+//     messages = "LOG_SUCCESS       | info    | The initialization finished successfully without homotopy method.
+// LOG_SUCCESS       | info    | The simulation finished successfully.
+// "
+// end SimulationResult;
+// ""
+// {0.0,3.0}
+// endResult