Nested Lists in ColumnText not rendered correctly

[joostme]

Describe the bug

When adding multiple nested lists, ColumnText stops rendering the list, when the nesting is reduced by more than one nesting level.
Let's say we have the following list

• 1
  • a
    • i
• 2

Note the differences in nesting. ColumnText will only render "1", "a" and "i". This happens because the reduction of nesting back to "2" involves more than 1 layer of nesting. If you have a layer in between, it works.

So this example works as expected:

• 1
  • a
    • i
  • b
• 2

I managed to track it down to this function https://github.com/LibrePDF/OpenPDF/blob/master/openpdf/src/main/java/com/lowagie/text/pdf/ColumnText.java#L1321 where it seems to exit early when the nesting is reduced by more than one layer.

To Reproduce

I added a very simple reproduction Repo to test this: https://github.com/joostme/openpdf-test/blob/main/src/main/java/org/example/Main.java

Expected behavior

All of the list (regardless of nesting changes) should be rendered in the ColumnText.

System

• OS: MacOS, Sonoma 14.4.1
• Used font: Default OpenPDF Font
• OpenPDF version: 2.0.2

Your real name

Joost Zöllner