Hello, perhaps this is a problem is just in image that i use, -- I tried reproducing bug in stock image and I see no problem there, so, sorry for noise.

Can you confirm this is exactly what you are doing: press blue button on world background press this halo handle:

yes.

What do you mean exactly with "stalls the Smalltalk"? Can you interrupt

anything by pressing cmd+dot? Does your VM react? Do you see any debuggers?

Smalltalk process starts using ~66%CPU, and cmd+dot does not work. will try to find out why this happened to mine image.

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*Von:* Squeak-dev squeak-dev-bounces@lists.squeakfoundation.org im Auftrag von Vaidotas Didžbalis vaidasd@gmail.com *Gesendet:* Freitag, 28. Februar 2020 12:46 Uhr *An:* Squeak-Dev *Betreff:* [squeak-dev] [bug] Squeak5.3rc2. Clicking on World's "paint background" Halo stalls the Smalltalk

Clicking on World's "paint background" Halo stalls the Smalltalk.

Squeak5.3rc2 latest update: #19422 Image format 6521 (32 bit)

Virtual Machine

Open Smalltalk Cog[Spur] VM [CoInterpreterPrimitives VMMaker.oscog-eem.2597] Unix built on Jan 6 2020 16:11:12 Compiler: 5.4.0 20160609 platform sources revision VM: 201912311458

regards, Vaidotas