Begin forwarded message:
From: Camillo Bruni <camillobruni@gmail.com> Subject: [Lsehub-staff] How to Debug :D Date: May 2, 2013 6:22:06 PM GMT+02:00 To: RMoD private list <lsehub-staff@lists.gforge.inria.fr> Reply-To: RMoD private list <lsehub-staff@lists.gforge.inria.fr>
Igor: Camillo can you help me debugging this strange athens rendering bug Cami: sure
Igor: where do you think the bug is? The green path jumps if I change the Y coordinate and it shouldn't... Cami: no clue...
Igor: Any clue how to get to the bug? Cami: let's use the ASTInterpreter to interpret two methods with different transformation matrices and see when they diverge.
Result: ------- - after 1h comparing AST Debugger is ready - we run the two traces, they do NOT diverge => ????
Conclusion: ----------- Cairo, which was chosen as reference, did not properly draw the path!!!
So we should publish the code of the ComparingInterpreter a bit and we can use it for a few more tasks in Pharo ;)