failed upgrade buster -> bullseye

["D. R. Evans" <doc.evans@gmail.com>]

I just tried to upgrade my main desktop machine (this machine) from buster to 
bullseye.

The upgrade halted with:

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...
Setting up libgnustep-base1.27 (1.27.0-3) ...
Processing triggers for shared-mime-info (2.0-1) ...
Setting up gnustep-base-runtime (1.27.0-3) ...
Setting up unar (1.10.1-2+b6) ...
Errors were encountered while processing:
 linux-image-5.10.0-8-amd64
 linux-image-amd64

Sub-process /usr/bin/dpkg returned an error code (1)

----

I have no idea what to do (other than to refrain from rebooting and hope that 
I don't lose power for so long that the UPS dies).

How do I start to find and fix the problem???

I do have a script record of the entire upgrade. It's about 6MB in length.

  Doc

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