[Gptfdisk-general] Please add a sanity check on a minimal block device size variable

[Christoph B. <sou...@ma...>]

Hello,

as reported in Debian bug report <https://bugs.debian.org/873452>: There
is a minimum block device size to hold a valid GP table. If I understand
the documents correctly it's 68 (512 byte) sectors and, violating the
specification, as low as four - but that's not something gptfdisk should
support anyway.

However, the report above tells gdisk shows weird results when operating
on a very small disk.

Please consider implementing a sanity limit to avoid such a weirdness.

Thanks in advance,

    Christoph