Failed to merge Modelica text @ comment and newline before equation

[Jan Kokert]

Dear developers,

I noticed, that from time to time OMEdit will shrink my source code together when I manipulate my model graphically. At the beginning, it seemed random, but I narrowed it down to a single issue (took me a while).

The Issue: When a model contains a comment sitting in the very front of the line AND followed by one (or) more newlines (can have white spaces) AND followed by equation (algorithm is fine actually), so this:

  Modelica.Electrical....
// comment at the very beginning and followed by a new line

equation
  connect ...

then the error message will pop up, as soon as you move components in the DiagramView:

[C:/dev/OpenModelica64bit/OMCompiler/Compiler/Script/CevalScriptBackend.mo: 1054:13-1054:204]: Internal error After merging the strings, the semantics changed for some reason (will simply return s2):
s1:
model test 
  Modelica.Electrical.Analog.Basic.Ground ground1 annotation( ... ) 

...

Please find attached the example.

Finally, your code is screwed up (all comment are cluttered and new lines are removed).

[Martin Sjölund]

Smaller example triggering the bug:

diffModelicaFileListings("model test
  M x;
// comment

equation
  connect(a, b);
end test;","model test
  M y;
  // comment
equation
  connect(a, c);
end test;", OpenModelica.Scripting.DiffFormat.color);getErrorString();

Note for myself: triggers in 2 places; fixMoveOperations causes the comment to be duplicated while disabling it causes the comment to be removed...

[Martin Sjölund]

​https://github.com/OpenModelica/OMCompiler/pull/2099 should fix this issue. Hopefully some of the other tickets as well.

[Martin Sjölund]

Fixed in maint/1.12 and master