Hi <@U016EM8L91B>, I am running into an odd magic crash when trying to write lef. I have two cells t...

Abhinav Uppal

09/23/2022, 6:37 PM

Hi @Tim Edwards, I am running into an odd magic crash when trying to write lef. I have two cells that are essentially flipped versions of each other. The first one writes lef out ok, but the second one makes magic crash. I updated magic to the latest Magic 8.3 revision 318 and the issue persists. Command used:

lef write -hide

Test case: • Passes: analog_core_Q.mag • Crashes magic: analog_core_I.mag

Abhinav Uppal

09/23/2022, 6:39 PM

Update:

lef write

works ok on analog_core_I.mag Only

lef write -hide

crashes for analog_core_I.mag

Tim Edwards

09/23/2022, 7:24 PM

I can confirm the crash condition, and I am investigating.

🤞 1

❤️ 1

Tim Edwards

09/23/2022, 7:38 PM

The immediate error is that there is a label "vdda" at (407704, 23488) that is attached to nothing (space). The underlying error is that magic crashes when a label attached to space is found by the "lef write" routine. I'm fixing that, but you might be able to work around the problem immediately by dealing with the label.

✅ 1

Tim Edwards

09/23/2022, 7:44 PM

Ah, the label is "vdda1" and it's offset from the wire by a little bit to the right. It appears to be the only label with such an offset, so I think it is a trivial workaround for you.

Abhinav Uppal

09/23/2022, 7:45 PM

Yep I found the problem -- this is where I was manually editing the magic file to quickly convert all labels to ports, and looks like one of my traces fell too short...thank you so much!

Tim Edwards

09/23/2022, 7:45 PM

Thanks for reporting the issue. I was able to correct the crash condition and that will be fixed in the next push.

🙌 1

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