Cannot nicely arrange connectors after re-opening file

[Gus Polly]

I can create a network of connectors with the Connector Tool, and then use "Nicely arrange selected connector network" from the Connector Tool toolbar or the Align & Distribute panel to nicely arrange it. However, if I save the file (as an Inkscape SVG, I did check that), close Inkscape, re-start Inkscape and then re-open the file, the arrangement command doesn't do anything.

Opening Inkscape in a terminal so I can see stderr, it gives the following errors when trying to do this:

** (inkscape:17275): WARNING **: getAttachedConnectors: Object with id="void" is not found. Skipping.

** (inkscape:17275): WARNING **: getAttachedConnectors: Object with id="-g-type-private--dependants-array" is not found. Skipping.

** (inkscape:17275): WARNING **: getAttachedConnectors: Object with id="-g-type-private--GTypeFlags" is not found. Skipping.

** (inkscape:17275): WARNING **: getAttachedConnectors: Object with id="-g-type-private--IFaceHolder" is not found. Skipping.

I am using Inkscape 0.92.0 r15299 on Debian testing, from the stretch repository (0.92.0-4).

[su_v (suv-lp)]

Based on tests with archived builds (on OS X 10.7.5):
- not reproduced with Inkscape 0.91 r13725,
- not reproduced with lp:inkscape rev <= 14244,
- reproduced with lp:inkscape rev >= 14245,
- reproduced with Inkscape 0.92.0 r15299, 0.92.1 r15371;
it seems likely that this regression was exposed in the changes of r14245:

"Fix for circular references detection in almost all cases, fixing bug #167247 and a few of its duplicates."
https://bazaar.launchpad.net/~inkscape.dev/inkscape/trunk/revision/14245

[Nathan Lee (nathan.lee)]

Original bug fixed in 1.0 (still present in 0.92.x); however marking as Fix committed because "Nicely arrange connectors" wasn't working until 1.1-dev (see https://gitlab.com/inkscape/inkscape/-/issues/1708), so you still couldn't nicely arrange connectors after opening file.

It was specifically fixed by https://gitlab.com/inkscape/inkscape/-/merge_requests/2177 (commit ca266cef9c8c8ec90bee5aa911c0c34ddce01e7d)