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[Torbjörn Rathsman <1993294@xxxxxxxxxxxxxxxxxx>]

Could this be related to a recent break of syscall copy_file_range.

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https://bugs.launchpad.net/bugs/1993294

Title:
  Export png fails with: Invalid cross-device link

Status in inkscape package in Ubuntu:
  Confirmed

Bug description:
  Export png fails with "Invalid cross-device link" if /tmp is mount as
  tmpfs.

  I have stored https://assets.ubuntu.com/v1/ce518a18-CoF-2022_solid+O.svg as file /home/user/CoF-2022_solid+O.svg.
  I open inkscape on the command line with inkscape CoF-2022_solid+O.svg.
  I select export png and try to export to my home directory.
  A file of length 0 is created.
  The console shows an error message:
  "boost::filesystem::copy_file: Invalid cross-device link: "/tmp/ink_ext_CF77T1", "/home/user/temp/cof.png"

  The following mounts exist:

  /dev/mapper/vgkubuntu-home on /home type ext4 (rw,relatime)
  zfsdt@workstation5:~/temp$ mount | grep '\/tmp'
  tmpfs on /tmp type tmpfs (rw,relatime,inode64)

  So /tmp and /home are actually separate devices.

  ln -s /home/user/temp/cof.png /tmp/cof.png
  works fine.

  ln /home/user/temp/cof.png /tmp/cof.png
  fails with 
  ln: failed to create hard link '/tmp/cof.png' => '/home/user/temp/cof.png': Invalid cross-device link

  Exporting to /tmp works.

  Inkscape should not create hardlinks on /tmp as /tmp typically is a
  tmpfs.

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