Package: imagemagick-6.q16 Version: 8:6.9.11.60+dfsg-1.6+deb12u2 For some (not all) PDF files, the bug occurs when by running `convert` on it and compressing it with JPEG2000: $ ls -la input_file.pdf | cut -d' ' -f5 78192505 $ convert input_file.pdf -compress JPEG2000 -quality 50 output_file.pdf convert: ../../magick/string.c:1186: GetStringInfoDatum: Assertion `string_info->signature == MagickCoreSignature' failed. Abgebrochen $ ls -la output_file.pdf | cut -d' ' -f5 1949696 $ pdfinfo output_file.pdf Syntax Error: Couldn't find trailer dictionary Syntax Error: Couldn't find trailer dictionary Syntax Error: Couldn't read xref table If I switch the local to en_US.utf8, the error message becomes “convert: ../../magick/string.c:1186: GetStringInfoDatum: Assertion `string_info->signature == MagickCoreSignature' failed.” The output file is broken and can be viewed with neither evince nor okular. Unfortunately, I cannot disclose the input file itself, but it was created, if my memory serves me right, with `convert out1.pnm … out11.pnm -compress Zip -quality 100 input_file.pdf` from 11 PNM files (one file for each page), and here is its metadata: $ pdfinfo input_file.pdf Custom Metadata: no Metadata Stream: no Tagged: no UserProperties: no Suspects: no Form: none JavaScript: no Pages: 11 Encrypted: no Page size: 2480 x 3507 pts Page rot: 0 File size: 78192505 bytes Optimized: no PDF version: 1.7
