gEDA-bug: [Bug 698570] Re: gnetlist can create an invalid netlist

[Krzysztof KoÅciuszkiewicz <698570@xxxxxxxxxxxxxxxxxx>]

It seems the bug is triggered when one net is renamed multiple times, each time to another name.
This patch adds a check for this and works correctly for the attached testcase.

It might be worthwile to add a hook in gnetlist to resolve rename conflicts.
This would allow for deterministic choice of the resulting netname.

** Patch added: "0001-gnetlist-fix-multiple-renames-for-same-source-net.patch"
   https://bugs.launchpad.net/geda/+bug/698570/+attachment/1922212/+files/0001-gnetlist-fix-multiple-renames-for-same-source-net.patch

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https://bugs.launchpad.net/bugs/698570

Title:
  gnetlist can create an invalid netlist

Status in GPL Electronic Design Automation tools:
  Triaged

Bug description:
  Attempting to netlist the attached schematics, will generate an
  invalid netlist.  The various nets will not be consolidated.

  These schematics contain:

  1) components which have multiple generic power symbols attached to the same net
  2) and these components are on at least two pages.

  The netlister should be creating one connected net.

  Note, this bug has probably existed since the beginning of time and is
  not backend specific.


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