cli: command "form list" does not extract combobox values

[sbourlon]

• Your issue is based on the latest commit

v0.6.0 dev

$ pdfcpu version
pdfcpu: v0.6.0 dev
panic: runtime error: slice bounds out of range [:8] with length 1

goroutine 1 [running]:
main.printVersion(0xc0001e1110)
        /home/stefan/Local/Go/pkg/mod/github.com/pdfcpu/pdfcpu@v0.6.0/cmd/pdfcpu/process.go:143 +0x24b
main.commandMap.process(0x44113c?, {0x7fff0e661735, 0x7}, {0x0, 0x0})
        /home/stefan/Local/Go/pkg/mod/github.com/pdfcpu/pdfcpu@v0.6.0/cmd/pdfcpu/cmd.go:143 +0x335
main.main()
        /home/stefan/Local/Go/pkg/mod/github.com/pdfcpu/pdfcpu@v0.6.0/cmd/pdfcpu/main.go:56 +0xa6
stefan@stefan-sb [03:47:52 PM] [~/tmp/cor/pdf]

• State your OS and OS version

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 23.10
Release:        23.10
Codename:       mantiUbuntu 23.10c

• Bug

Hello Horst, the bug is with the command pdfcpu form list

$ pdfcpu form list t2short-fill-19e.orig2.pdf  | grep -i combo
     ComboBox  │ 349.353.385.437.302     │ form1[0].Page3[0].Head_office[0].Line_016[0].Input_016[0]                            │         │       │ ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
     ComboBox  │ 349.353.386.429.293     │ form1[0].Page3[0].Mailing_address[0].Line_026[0].Input_026[0]                        │         │       │ ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
     ComboBox  │ 349.353.387.420.285     │ form1[0].Page3[0].Location_books[0].Line_036[0].Input_036[0]                         │         │       │ ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

The value of the three combo box (page 3) are not reported by pdfcpu when using the PDF https://www.canada.ca/content/dam/cra-arc/formspubs/pbg/t2short/t2short-fill-19e.pdf, neither the combox box options.

 $ pdfcpu info ~/Downloads/t2short-fill-19e.pdf
/home/stefan/Downloads/t2short-fill-19e.pdf:
              Source: /home/stefan/Downloads/t2short-fill-19e.pdf
         PDF version: 1.7
          Page count: 4
           Page size: 612.00 x 792.00 points
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
               Title: T2 Short Return (2019 and later tax years)
              Author:
             Subject:
        PDF Producer: Designer 6.3
     Content creator: Designer 6.3
       Creation date: D:20191212115624-05'00'
   Modification date: D:20200108145629-05'00'
        Viewer Prefs: DisplayDocTitle = true
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
              Tagged: Yes
              Hybrid: No
          Linearized: No
  Using XRef streams: Yes
Using object streams: Yes
         Watermarked: No
          Thumbnails: No
                Form: Yes
     SignaturesExist: Yes
          AppendOnly: Yes
            Outlines: No
               Names: Yes
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
           Encrypted: Yes
         Permissions:
permission bits: 101100110100 (xB34)
Bit  3: true (print(rev2), print quality(rev>=3))
Bit  4: false (modify other than controlled by bits 6,9,11)
Bit  5: true (extract(rev2), extract other than controlled by bit 10(rev>=3))
Bit  6: true (add or modify annotations)
Bit  9: true (fill in form fields(rev>=3)
Bit 10: true (extract(rev>=3))
Bit 11: false (modify(rev>=3))
Bit 12: true (print high-level(rev>=3))

However, using the provided example english.pdf from pdfcpu website, the values are properly extracted.

Do you have any guidance to debug this issue? I would be happy to contribute with a fix.

[hhrutter]

Thanks for reporting this!

[hhrutter]

This is fixed with the latest commit!