Bug#844519: Stretch Alpha 8 Installation Failure

[Michael Owen <mowen1947@gmail.com>]

Package: installation-reports

    Stretch Alpha 8 Installation Failure

Boot method: netinst, both Alpha 8 and Daily Build
Image version: Alpha 8
Date: Multiple times, multiple machines, multiple drives

Machine: Gigabyte GA-G31M-ES2K
         Dell Inspiron 3847
Processor: Intel Core2 Duo 7800 (Gigabyte)
           Intel i3 4th Generation (Dell)
Memory: 4 GB DDR2 (Gigabyte)
        8 GB DDR3 (Dell)
Partitions: sda1 full drive, sda5 (Gigabyte)
        sda1 and sda5 (Dell)
        (multiple configurations testing, including full drive single
partition)

Output of lspci -knn (or lspci -nn):

Base System Installation Checklist:
[O] = OK, [E] = Error (please elaborate below), [ ] = didn't try it

Initial boot:           [O]
Detect network card:    [O]
Configure network:      [O]
Detect CD:              [O]
Load installer modules: [O]
Detect hard drives:     [O]
Partition hard drives:  [O]
Install base system:    [E]
Clock/timezone setup:   [O]
User/password setup:    [O]
Install tasks:          [ ]
Install boot loader:    [ ]
Overall install:        [E]

Comments/Problems:
Installation fails on base system install with the following error message:
    /lib/partman/choose_partition/60partition_tree/do_option: line 88
then it states
    /lib/partman/active_choices/copy/choices: not found
then it states
    debootstrap error 127

<Description of the install, in prose, and any thoughts, comments
      and ideas you had during the initial install.>

I get the identical error on both machines and in all possible
configurations. The two copies
of netinst were full download of netinst and a daily obtained with jigdo
with good checksum.
The only thing in common between the machines is both have Intel
processors with Intel graphics
but the Dell is much later version.