Splitting a self intersecting way does not highlight the right segments before the split

[FvGordon]

What steps will reproduce the problem?

1. Open a self intersecting line (a line, which uses the same node twice in a line, but not at the first and last node of a closed line) like this one: ​https://www.openstreetmap.org/way/377283802

2. Mark two nodes, one somewhere before and one somewhere after the common used node (in the given example one node of the island and the other one somewhere on the outline of the lake).

3. Now split the line e.g. with the letter P from the keyboard or with the menu. The following dialog window does not highlight the right segments when clicking the different lines of the dialog box to select, which part shall become the old ID and also the history.

What is the expected result?

Selecting all lines in the dialog box one after the other should highlight in the sum each segment (segment is here the part of the line between two adjacent nodes).

What happens instead?

Selecting all lines in the dialog box one after the other does not highlight one segment and highlights one other segment duplicate.

Please provide any additional information below. Attach a screenshot if possible.

Revision: 8969
Repository Root: http://josm.openstreetmap.de/svn
Relative URL: ^/trunk
Last Changed Author: Don-vip
Last Changed Date: 2015-10-29 22:15:23 +0100 (Thu, 29 Oct 2015)
Build-Date: 2015-10-30 02:32:24
URL: http://josm.openstreetmap.de/svn/trunk
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last Changed Rev: 8969

Identification: JOSM/1.5 (8969 de) Windows 8.1 64-Bit
Memory Usage: 194 MB / 455 MB (106 MB allocated, but free)
Java version: 1.8.0_65, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Dataset consistency test: No problems found

Plugins:
- imageryadjust (31690)
- kendzi3d (1.0.188)
- kendzi3d-jogl (41)
- kendzi3d-resources (0.0.1)
- log4j (31603)
- measurement (31694)
- reverter (31694)
- turnlanes (31603)
- turnrestrictions (31694)
- undelete (31603)
- utilsplugin2 (31694)

[simon04]

In 8990/josm:

fix #12052 - Splitting a self intersecting way does not highlight the right segments