Let simple array equations pass the backend, ticket:5110

if -d=-nfScalarize
- adapt equation count
- turn error from strongComponentsScalar to warning

Belonging to [master]:
  - #2679

Compiler/BackEnd/BackendDAETransform.mo

@@ -104,8 +104,13 @@ algorithm
     then (syst, comps);
 
     else algorithm
-      Error.addInternalError("function strongComponentsScalar failed (sorting strong components)", sourceInfo());
-    then fail();
+      if Flags.isSet(Flags.NF_SCALARIZE) then
+        Error.addInternalError("function strongComponentsScalar failed (sorting strong components)", sourceInfo());
+        fail();
+      else
+        Error.addCompilerWarning("BackendDAETransform.strongComponentsScalar failed (sorting strong components)");
+      end if;
+    then (inSystem, {});
   end matchcontinue;
 end strongComponentsScalar;
 

Compiler/BackEnd/BackendEquation.mo

@@ -188,11 +188,17 @@ public function equationArraySize "author: lochel
   should correspond to the number of variables."
   input BackendDAE.EquationArray equationArray;
   output Integer outSize;
+protected
+  Boolean nfScalarize = Flags.isSet(Flags.NF_SCALARIZE);
 algorithm
   outSize := 0;
   for i in 1:ExpandableArray.getLastUsedIndex(equationArray) loop
     if ExpandableArray.occupied(i, equationArray) then
-      outSize := outSize + equationSize(ExpandableArray.get(i, equationArray));
+      if nfScalarize then
+        outSize := outSize + equationSize(ExpandableArray.get(i, equationArray));
+      else
+        outSize := outSize + 1;
+      end if;
     end if;
   end for;
 end equationArraySize;