unconnected net lines are sometimes not visible

[Thomas Pointhuber]

Sometimes, unconnected nets are not visually shown inside pcbnew using lines:

https://owncloud.oe5tpo.com/index.php/s/GjqKAGXUMv1ANHw

https://owncloud.oe5tpo.com/index.php/s/PNHZuBqay67YI9R

Application: kicad
Version: (2017-08-01 revision 9cbcb3224)-master, release build
Libraries: wxWidgets 3.0.3
           libcurl/7.54.1 OpenSSL/1.1.0f zlib/1.2.11 libpsl/0.17.0 (+libicu/59.1) libssh2/1.8.0 nghttp2/1.23.1
Platform: Linux 4.12.3-1-ARCH x86_64, 64 bit, Little endian, wxGTK
- Build Info -
wxWidgets: 3.0.3 (wchar_t,wx containers,compatible with 2.8)
Boost: 1.64.0
Curl: 7.54.1
KiCad - Compiler: GCC 7.1.1 with C++ ABI 1011
        Settings: USE_WX_GRAPHICS_CONTEXT=OFF
                  USE_WX_OVERLAY=OFF
                  KICAD_SCRIPTING=ON
                  KICAD_SCRIPTING_MODULES=ON
                  KICAD_SCRIPTING_WXPYTHON=ON
                  KICAD_SCRIPTING_ACTION_MENU=OFF
                  BUILD_GITHUB_PLUGIN=ON
                  KICAD_USE_OCE=OFF

[Thomas Pointhuber (pointhi)]

A clean rebuild seems to fix the issue on my system, which means it's likely invalid

[Thomas Pointhuber (pointhi)]

ok, it's a bug. It appeared again, and simply closing and opening KiCad fixed the issue this time.

[Jeff Young (jeyjey)]

Does anyone know of reproducible steps for this? How often does it happen?

[Maciej Suminski (orsonmmz)]

In June 2017 a new connectivity algorithm was developed, most likely it has fixed the issue described in this bug report.

[Nick Østergaard (nickoe)]

@maciej, but the original bug was reported on a later build from beginning of august, which is later, if you mean that the new connectivity algo was merged at that time.

[Maciej Suminski (orsonmmz)]

Right, I must have misread the date. Thank you for the correction.

[Thomas Pointhuber (pointhi)]

I did a test with this project again, using a current dev version:

* On GAL: nothing suspcious noticed anymore
* On Legacy: doing a simple "Route Track" causes the unconnected lines to disappear. Doing a simple zoom action makes them visible again.

[Jeff Young (jeyjey)]

@pointhi, thanks for checking. There are a bunch of "oddities" with rats-nests in Legacy, and at this point (near its retirement) I don't think they'll get fixed.

[jean-pierre charras (jp-charras)]

commit 0f0d9afa should fix this artifact.