The problem is that if you put it in the rendering code this will basically get invoked every 30 ms. A more practical solution is to use haltOnce. This is the same as halt, only that it is guarded by a global flag. Just make sure that you enable it from the Debug world menu.

I am not expert in Morphic, but I feel there is a bug in how exceptions in Morph are handled. Create a subclass of Morph and put a "self halt" (or "1/0") in the drawOn: method. Open the morph and it will appear in red, telling that there is an error in the render loop. Now, for some reason, when blocks are heavily, the image freeze. I tried to isolate the error (i.e., without Mondrian), but I could not figure out how to do it. Alexandre

Cheers, Doru

On 2 Dec 2009, at 13:10, Johan Fabry wrote:

...

Hi Stef, this is the same behavior as what I reported in http://code.google.com/p/pharo/issues/detail?id=1525 and http://code.google.com/p/moose-technology/issues/detail?id=237 How to reproduce is also there. On 02 Dec 2009, at 08:30, Stéphane Ducasse wrote:

...

Do you have a example that we can reproduce?

Stef

On Dec 1, 2009, at 9:23 PM, Alexandre Bergel wrote:

...

...

Regarding the problem with the number of arguments in the block. Why is it crashing the image?

The image is not crashing actually. It just hangs on forever without giving a chance to interrupt the process.

...

Anyway, you might want to use an approach similar to the implementation of glamourValue: in Glamour.

It could be a nice fix, but clearly not a general solution. The image hangs because of a bug in Squeak/Pharo. For some reason, the exception thrown by the virtual machine is not properly caught. This is a hard problem that will need to be fixed some days.

Alexandre

-- Johan Fabry jfabry@dcc.uchile.cl - http://dcc.uchile.cl/~jfabry PLEIAD Lab - Computer Science Department (DCC) - University of Chile

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