>> This seems to have given rise to the following build error with --enable-checking=structs:
>>
>> pdumper.c: In function ‘dump_buffer’:
>> pdumper.c:2705:3: error: #error "buffer changed. See CHECK_STRUCTS comment in config.h."
>>  2705 | # error "buffer changed. See CHECK_STRUCTS comment in config.h."
>>       |   ^~~~~
>>
>> Is this the right fix?
>
> Yes, thanks.
>

Thanks.  But how comes this warning did not show up in my 
--enable-checking=all build?  Is "all" not really "all"?  If not, what's 
the appropriate value for "really all"?