I can also confirm this bug. I have an UEFI system and latest Ubuntu 19.10 installed with updated packages. Grub2 shows these errors when trying to list an ISO with ls command from Command line in the grub2 environment. It doesn't show any error if I list a pdf it any other files. Problem seems to be in the iso9660 module.
I can also confirm this bug. I have an UEFI system and latest Ubuntu 19.10 installed with updated packages. Grub2 shows these errors when trying to list an ISO with ls command from Command line in the grub2 environment. It doesn't show any error if I list a pdf it any other files. Problem seems to be in the iso9660 module.