Bug#966575: grub-pc: error: symbol `grub_calloc' not found

[Steve McIntyre]

Hi John,

On Fri, Jul 31, 2020 at 09:29:43AM +0100, John Lines wrote:
>I have the same error, on a DNUK Workstar 700, dating back to 2014, so
>upgraded from squeeze on up to buster.It is possible this legacy which
>has resulted in something unusual in the grub configuration. 
>
>I upgraded grub yesterday, and am working on recovering now. Posting
>from another system.

ACK. Same thing applies as I suggested to Paul - maybe an inconsistent
set of updates. Do you have multiple disks? If so, try "grub-install
<disk>" on all the bootable disks and that may fix your problem. If
not, please get back to us ASAP and we'll try to debug the problem
here.

-- 
Steve McIntyre, Cambridge, UK.                                steve at einval.com
Into the distance, a ribbon of black
Stretched to the point of no turning back