Is unknown to the pdumper with --enable-checking=structs:

  CC       pdumper.o
pdumper.c: In function ‘dump_buffer’:
pdumper.c:2751:3: error: #error "buffer changed. See CHECK_STRUCTS comment in config.h."

Does the field need any special handling, or can HASH_buffer be safely
updated?

Thanks,

-- 
Basil