crash after pressing page down in swatch manager

[mray]

Inkscape 0.91+devel r on Ubuntu 14.10 64bit

Steps to reproduce crash:
1. open document with an object and multiple swatches
2. select a swatch (not the lowest in the swatch list)
3. press "page down"

[su_v (suv-lp)]

Thank you for taking the time and filing this report.

Crash reproduced with Inkscape 0.91+devel r14030 and r14035 on OS X 10.7.5, with this console message:
Gtk:ERROR:gtkrbtree.c:967:_gtk_rbtree_node_find_offset: assertion failed: (node->left)

Based on the attached backtrace (created with 0.91+devel r14035), and the similarities of gradient and swatch (single-stop gradient) lists in the 'Fill and Stroke' dialog, the same kind of issue was filed earlier and is now tracked in
* Bug #1392668 “[trunk] crash in gradient dialog”
  https://bugs.launchpad.net/inkscape/+bug/1392668

Proposing to link as duplicate (variation) to bug #1392668.

[su_v (suv-lp)]

Also reproduced with current stable Inkscape 0.91 r13725 on OS X 10.7.5 (testing GTK+ 2.24.27 with both available backends on OS X).