Text Input emits zero rows when Offset is set and Limit is left empty #7346

What happened?

TextInputSourceOpExec computes the end of its slice as offset + limit.getOrElse(Int.MaxValue). When the user sets an Offset and leaves Limit empty, that addition overflows to a negative number and the operator emits no rows at all, silently and with no error — the workflow reports success. Any Offset ≥ 1 with an empty Limit is affected.

Expected: Offset = 1 with an empty Limit reads from line 1 to the end of the input.

How to reproduce?

1. Add a Text Input source operator.
2. Paste five lines of text into the Text property (a, b, c, d, e on separate lines).
3. Leave Attribute Type at its default (string, i.e. one tuple per line).
4. Set Offset (lines) to 1. Leave Limit (lines) empty.
5. Run the workflow and view the results.

Observed: zero rows, with the workflow reporting success.
Expected: four rows — b, c, d, e.

Version/Branch

1.3.0-incubating-SNAPSHOT (main)

Commit Hash (Optional)

No response

What browsers are you seeing the problem on?

No response

Relevant log output