linuxcncrsh crashes when get_spindle or get_spindle_overide commands executed

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galmiklos
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24 Aug 2026 02:43 - 24 Aug 2026 02:58 #348949 by galmiklos

linuxcncrsh crashes when get_spindle or get_spindle_overide commands executed was created by galmiklos

Running linuxcnc 2.9.10 with linuxcncrsh loaded. When a client connects and executes a get spindle or get spindle_override command, linuxcncrsh crashes with segmentation fault.

This is the line in custom.hal.

[code]loadusr linuxcncrsh --port 5007 --connectpw EMC --enablepw EMCT00

linuxcncrsh started like this

[code]gal@linuxcnc-vm:~/linuxcnc/configs/sim.qtdragon_hd.qtdragon_hd_xyz$ linuxcncrsh -p 5007 -w EMC -e EMCT00 -- -ini /home/gal/linuxcnc/configs/sim.qtdragon_hd.qtdragon_hd_xyz/qtdragon_hd_xyz.ini
Connected to telnet
Segmentation fault

These are the commands on the client side.

[code]gal@roki:~$ telnet 192.168.3.125 5007
Trying 192.168.3.125...
Connected to 192.168.3.125.
Escape character is '^]'.
hello EMC telnet 1.0
HELLO ACK EMCNETSVR 1.1
get spindle
get spindle
Connection closed by foreign host.

[/code][/code][/code]

Last edit: 24 Aug 2026 02:58 by galmiklos.

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Aciera
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24 Aug 2026 15:43 #348958 by Aciera

Replied by Aciera on topic linuxcncrsh crashes when get_spindle or get_spindle_overide commands executed

There has been a fair bit of work going on there.
Could you raise an issue on GitHub?
github.com/LinuxCNC/linuxcnc/issues

If not then I can open one and link here but it would be better to have you in the loop.

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tommylight
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24 Aug 2026 16:00 #348960 by tommylight

Replied by tommylight on topic linuxcncrsh crashes when get_spindle or get_spindle_overide commands executed

Is LinuxCNC running inside a VM or bare metal?

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galmiklos
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24 Aug 2026 16:22 #348962 by galmiklos

Replied by galmiklos on topic linuxcncrsh crashes when get_spindle or get_spindle_overide commands executed

I tried it with a VM and sim config, as well as with a real CNC (PrintNC) on a Pi5, same behaviour.

I installed a recent dev version (github.com/LinuxCNC/linuxcnc/actions/runs/32728344015), and the linuxcncrsh coming with it works as expected. Since this dev version appeared to be a 2.10 pre-release, if the release of 2.10 is in the near future, I can live with using this dev version, don't see the need for opening an issue for 2.9.

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