Re: medm edit mode SIGSEGV core dump Ubuntu 24.04.

["Soliday, Robert T. via Tech-talk" <tech-talk at aps.anl.gov>]

I was able to duplicate the problem with MEDM in edit mode on Ubuntu 24.04 and verified that your source code change is an effective workaround. I have updated our Github release to include this fix.

Thanks,

--Bob Soliday

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From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of Rong Huang via Tech-talk <tech-talk at aps.anl.gov>
Sent: Wednesday, December 4, 2024 11:00 AM
To: tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>
Subject: medm edit mode SIGSEGV core dump Ubuntu 24.04.

 

Hello,

Something is wrong with my medm installation.

First time using Ubuntu 24.04 for EPICS. (libmotif-dev 2.3.8-3.1build;  libx11-dev 2:1.8.7-1build1)

This error happens for both medm3_1_19 and medm3_1_20.  medm was built without error messages.

When I use medm in edit mode, by running, for example:

medm simDetector.adl

as long as I click anywhere on the opened GUI, all medm windows crashed, and the messages on the terminal is:

SIGSEGV   Aborted (core dumped)

This crash also happens if I just click on a new empty adl panel or any medm object palette menu item.

Follow ChatGPT instructions, I built medm with USR_CFLAGS = -g, ran medm within gdb, opened simDetector.adl, clicked on the adl GUI, got segmentation fault at initializeResourcePaletteElements () at ../resourcePalette.c:2474

However, if add:

                  sleep(0.05);

right before line 2474, medm edit mode works without crashes.

For my tentative workaround, I am using medm with this sleep(0.05)

Thank you,

Rong Huang