DRC Potential Graphical Bug in 0.29.9 and 0.29.10

[adarcie]

2025-01-15_DRC_Bug_Testing.zip

Hi Matthias,

I've run into what seems like a fairly major graphical issue when running DRC on the two latest releases (0.29.9 and 0.29.10). 0.29.8 is stable for me.

Bug Description:
-After running DRC and selecting one of the results, the pattern in the main layout window disappears - only DRC-flagged regions are visible.
-Clicking into the main layout window causes the whole cell tree to disappear.
-Objects in the layout window are still selectable, and the layer tree will act as if nothing is out of the ordinary, but none of the colors or patterns will be visible.

Steps to recreate:
-Update KLayout to version 0.29.9 or 0.29.10.
-Run DRC on a layout.
-Click one of the DRC results.
-Click anywhere in the main layout window.

I've attached a zip file containing a simple layout and DRC script. Let me know if you're able to recreate it, or if there's an existing bug report that covers it.

Thanks!
Adam

[klayoutmatthias]

Hi @adarcie,

thanks for reporting that issue. I can reproduce the problem on my side with the mentioned versions.

I think the problem is related to issue #1955. This has been fixed in the master branch. You can try if that is the case: nightly builds of the master branch are provided here: https://www.klayout.org/downloads/master/ (disclaimer: the binaries are not signed).

I will release the next version (0.29.11 soon).

Best regards,

Matthias

[klayoutmatthias]

Hi @adarcie,

I can no longer reproduce the problem with the 0.29.11 version I have just released. If you think the bug is gone, please close this ticket.

Thanks,

Matthias