Fwd: Message with no Package: tag cannot be processed! (Fwd: Debian Testing Cannot be installed on Hyper-V 2012 R2)

---------- Forwarded message ----------
From: Debian Bug Tracking System <owner@bugs.debian.org>
Date: Tue, Jun 21, 2016 at 9:51 AM
Subject: Message with no Package: tag cannot be processed! (Fwd: Debian Testing Cannot be installed on Hyper-V 2012 R2)
To: Larry Sevilla <sevilla.larry.oss@gmail.com>

Your message didn't have a Package: line at the very first line of the
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Your message was dated Tue, 21 Jun 2016 09:46:02 +0800 and had
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---------- Forwarded message ----------
From: Larry Sevilla <sevilla.larry.oss@gmail.com>
To: submit@bugs.debian.org
Cc:
Date: Tue, 21 Jun 2016 09:46:02 +0800
Subject: Fwd: Debian Testing Cannot be installed on Hyper-V 2012 R2

---------- Forwarded message ----------
From: Larry Sevilla <sevilla.larry.oss@gmail.com>
Date: Tue, Jun 21, 2016 at 9:11 AM
Subject: Debian Testing Cannot be installed on Hyper-V 2012 R2
To: debian-user@lists.debian.org

I'm trying to install Debian Testing under Hyper-V Windows Server 2012 R2.

iso file: debian-testing-i386-netinst.iso dated 2016-06-20 07:33 391Mb

mem: Start-up 1024Mb Dynamic Min 512Mb Max 3584

proc: 2

vhd: 10Gb

Install it using non-GUI.

Then It freezes during:
Partitions formatting at 33%

Creating ext4 file system for / in partition #1 of SCSI3 (0,0,0) (sda)...

Note: I have installed Debian 7/Wheezy 7.11 and 8/Jessie 8.5 on Hyper-V;
so far no problem on installation with the two versions...