ClassCastException crashes on some PDFs, no output produced
pdftk crashes with a Java ClassCastException on some valid PDFs, producing no output file.
Tier I · Proven The best-established problems.
7 public reports · first reported 2 April 2020 · last reported 4 October 2025
What's going wrong
Users running pdftk to flatten, stamp, cat, burst or save PDFs hit a Java ClassCastException that aborts the run with an empty or missing output.
AI-assisted: written with the help of AI from the reports. The idea report has the full summary.
In the idea report
- The full summary.
- The products the 7 reports are about, and how many came each month.
- Related problems.
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