bugGNU Octave - Bugs: bug #50692, Command Window outputs spurious...


bug #50692: Command Window outputs spurious newline every 30 sec.

Submitted by:  None
Submitted on:  Fri Mar 31 16:30:25 2017  
Category: GUISeverity: 3 - Normal
Priority: 5 - NormalItem Group: None
Status: NoneAssigned to: None
Originator Name: tcbrookeOriginator Email: -unavailable-
Open/Closed: OpenRelease: 4.2.1
Operating System: Microsoft Windows

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Tue Apr 4 17:15:11 2017, comment #2:

After reinstalling Octave: still does it.

No OF packages loaded.
Just start "Octave (GUI)" and click things.
However, it's my understanding that some packages are loaded implicitly (e.g., general and miscellaneous). Here's my path immediately after startup:

p = .;C:\Octave\OCTAVE~1.1\lib\octave\4.2.1\site\oct\x86_64-w64-mingw32;C:\Octave\OCTAVE~1.1\lib\octave\site\oct\

It still does it after closing/showing the Command Window, and/or the File Browser, and/or the Workspace, and/or the Command History panes.

During installation, Octave reported that it couldn't find a JRE. There is a JRE installed, and on the path, but the items on the path are symlinks. I could not find a way to tell Octave where to look specifically.

During installation, I selected the [default] "OpenBLAS" library.

No idea if any of that matters.

Mon Apr 3 20:41:40 2017, comment #1:

I tried your examples in Octave-4.3.0+ (dev version) but I cannot reproduce your issues.
The sort of problems you describe are often fairly hard to reproduce anyway.
Windows 10 with all its silent if not stealth updates / upgrades is a bit of a moving target - that already broke some of my hardware drivers (reason for me to stick with Win 7 as much as I can).

Have you tried re-installing Octave?
Did you have any OF packages loaded (using the "pkg load <list of packages>" command?
Have you experimented with showing / hiding panes?
(sorry for all those questions but you seem to be able to reproduce, so you're the one best suited to discover some sort of pattern or consistent behavior)

Philip Nienhuis <philipnienhuis>
Project Member
Fri Mar 31 16:30:25 2017, original submission:

Some commands/actions cause the Command Window to output a newline every 30 seconds or so. Even when in the middle of entering a command.

Once it starts, there does not seem to be any way to stop it.

Things which seem to cause it to happen:

  • Expand a directory (the '+' icon) in the File Browser panel.
  • Select a recent directory from the File Browser current working directory choice/drop-down/combo-box control
  • Double-click a directory in the File Browser panel.

Things which don't seem to cause it to happen:

  • Scroll the list of files/directories in the File Browser panel.
  • Show the drop-down list of recent directories (without selecting one)
  • Select (single-click) a directory in the File Browser panel.

Additionally, some commands seem to trigger the problem fairly reliably -- but not universally:

  • 'cd Someplace' (no quotes)
  • 'cd ".."'

Others do not:

  • 'cd "Someplace"' (with quotes)

Clearing the command window does NOT stop the periodic newlines.

Unchecking the preference "Synchronize Octave Working Directory with file browser" does not stop the periodic newlines, nor does it prevent them from happening in the first place.


Windows10 (yes, I realize this is still experimental)

GNU Octave, version 4.2.1
Octave was configured for "x86_64-w64-mingw32".

Installed from "octave-4.2.1-w64-installer.exe"

Invoked from "Octave (GUI)" choice on Start menu



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