From vanderhyde at sxu.edu  Thu Jan 25 10:27:40 2024
From: vanderhyde at sxu.edu (Vanderhyde, James)
Date: Thu, 25 Jan 2024 15:27:40 +0000
Subject: alice-teacher AssertionError when dropping a procedure with a
	parameter
Message-ID: <7D601664-6B7D-472F-A3A1-2A248BE343B1@sxu.edu>

I discovered a bug in Alice 3.8 when demoing something in class yesterday. Some students experienced it in class as well. It happens on both Mac and Windows.

The bug occurs when creating a scene procedure with a parameter. If the procedure is already in use, it has to be updated, OK. If you try to drag another invocation of the procedure, the drop sometimes generates an AssertionError. The Queen pops up. The drag and drop action is interrupted. I tell students to save and relaunch Alice. Nothing bad seems to happen after.

Here are the steps to reproduce the error:
1. Launch Alice. Create a new scene.
2. Add a scene procedure.
3. Switch back to myFirstMethod and call the new procedure.
4. Switch back to the new procedure and add a parameter. Tick the box "I understand I need to update the invocations to this procedure."
5. Switch back to myFirstMethod.
6. Fix the invocation (or not, it doesn't matter)
7. Drag a new invocation of the procedure, and drop it _above_ the existing procedure invocation.
This generates an "Assertion Error."

I have been using this same process for teaching parameters for years in Alice 3 without encountering this issue, so I think it is new to version 3.8. I filed the bug report within the Alice environment.

James
?
James Vanderhyde
Associate Professor
Computer Science
Saint Xavier University
3700 W. 103rd St.
Chicago, IL 60655
773-298-3454
vanderhyde at sxu.edu<mailto:vanderhyde at sxu.edu>
sxu.edu<http://sxu.edu>

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From melanielam at cmu.edu  Thu Jan 25 14:08:36 2024
From: melanielam at cmu.edu (Melanie Lam)
Date: Thu, 25 Jan 2024 11:08:36 -0800
Subject: alice-teacher AssertionError when dropping a procedure with a
	parameter
In-Reply-To: <7D601664-6B7D-472F-A3A1-2A248BE343B1@sxu.edu>
References: <7D601664-6B7D-472F-A3A1-2A248BE343B1@sxu.edu>
Message-ID: <CAAuKJEFEPLyNpE8GwjA4uk5QJ=AcbY=j=ruuZw=z=M5SpzfeBQ@mail.gmail.com>

James,

Thanks for the write up of the bug. The issue is logged and can be tracked
here:
https://github.com/TheAliceProject/alice3/issues/370

As always, we appreciate our community for helping us improve Alice!
Issues can be reported directly to our github issue page:
https://github.com/TheAliceProject/alice3/issues

best
Melanie





On Thu, Jan 25, 2024 at 8:59?AM Vanderhyde, James <vanderhyde at sxu.edu>
wrote:

> I discovered a bug in Alice 3.8 when demoing something in class yesterday.
> Some students experienced it in class as well. It happens on both Mac and
> Windows.
>
> The bug occurs when creating a scene procedure with a parameter. If the
> procedure is already in use, it has to be updated, OK. If you try to drag
> another invocation of the procedure, the drop sometimes generates an
> AssertionError. The Queen pops up. The drag and drop action is interrupted.
> I tell students to save and relaunch Alice. Nothing bad seems to happen
> after.
>
> Here are the steps to reproduce the error:
> 1. Launch Alice. Create a new scene.
> 2. Add a scene procedure.
> 3. Switch back to myFirstMethod and call the new procedure.
> 4. Switch back to the new procedure and add a parameter. Tick the box "I
> understand I need to update the invocations to this procedure."
> 5. Switch back to myFirstMethod.
> 6. Fix the invocation (or not, it doesn't matter)
> 7. Drag a new invocation of the procedure, and drop it _above_ the
> existing procedure invocation.
> This generates an "Assertion Error."
>
> I have been using this same process for teaching parameters for years in
> Alice 3 without encountering this issue, so I think it is new to version
> 3.8. I filed the bug report within the Alice environment.
>
> James
> ?
>
> *James Vanderhyde *Associate Professor
> Computer Science
> Saint Xavier University
> 3700 W. 103rd St.
> Chicago, IL 60655
> 773-298-3454
> vanderhyde at sxu.edu
> sxu.edu
>
> _______________________________________________
> alice-teachers mailing list
> alice-teachers at lists.andrew.cmu.edu
> To change settings or unsubscribe visit:
> https://lists.andrew.cmu.edu/mailman/listinfo/alice-teachers



-- 
*Melanie Lam* | Director | The Alice Project
*Entertainment Technology Center | Carnegie Mellon University*
| 415 608 4033 | melanielam at cmu.edu
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