While working on T215293: Moved 100% match was not found (Michgrig bug) a second bug was discovered. The effects of both bugs appear to be the same, but are caused by different pieces of code, and show up in different test cases.

• Bug: https://wmde-wikidiff2-patched.wmflabs.org/core/?diff=47248. The last line on the left side (the line [[Category:New Hampshire state highways|145]]) does have an arrow that points to nowhere.
• Fixed: https://wmde-wikidiff2-debug.wmflabs.org/core/?diff=47248
• Original edit: https://en.wikipedia.org/wiki/Special:Diff/100781760

TODO:

• Already fixed via https://gerrit.wikimedia.org/r/#/c/493258/1..3/Wikidiff2.cpp.
• Add regression test to the wikidiff2 codebase.