[LinuxCNC/linuxcnc Issue#561] Linuxcnc gui freezing when put subprogram into a while[1] About GRBL HAL

Issue #561 | 状态: 进行中 | 作者: lethang12cdt | 创建时间: 2019-02-20

Here are the steps I follow to reproduce the issue:

1. Creat a sub program (or subprogram file)
2. Creat a program that have while[1] , in while[1] call subprogram
3. Open this program by Linuxcnc gui (axis,gscreen,…)

This is what I expected to happen:

Program run normally

This is what happened instead:

Gui freezing when i open this program

Information about my hardware and software:

* I am using this Linuxcnc 2.8 on ubuntu 16.04
* I am using this kernel version (shown by uname -a): realtime preempt-rt 4.9.47-rt37

#1 – andypugh 于 2019-02-25

There probably should be a trap for this.
What is happening is that LinuxCNC is fine, but the graphical preview is stuck in an infinite loop.
There are workarounds, though I do think that maybe this classes as a bug.
You can use “magic comments” (AXIS, STOP) to a prevent the preview loop, though a cleverer way is to use the #<_task> parameter
O100 WHILE [#<_task> EQ -1.0]

原始Issue: https://github.com/LinuxCNC/linuxcnc/issues/561

Here are the steps I follow to reproduce the issue:

This is what I expected to happen:

This is what happened instead:

Information about my hardware and software:

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