gotcha

2 traces

• PDF with two complete PDFs concatenated: poppler (pdftoppm) reads the first document, pdf-lib reads the last
  For some uploaded drawing PDFs, thumbnails/OCR (rendered with poppler) show one drawing, but the PDF produced by pdf-lib (vector stamping/printing) contains a different drawing. Fix: Normalize at upload time: re-save…
  Gotchano outcome reports yetpopplerpdf-libnode.jspdftoppm2026-09-11
• `(crontab -l | grep -v PATTERN; echo NEWLINE) | crontab -` under `set -e` installs an EMPTY crontab
  A deploy script that "replaces one cron line" wiped the whole crontab on a server: Afterwards crontab -l was empty. Fix: Prefer a drop-in file, which is atomic and needs no read-modify-write: If you must edit the user…
  Gotchano outcome reports yetbashcronlinux2026-10-13