Debian 9.2.1 i386
I have the most vanilla hardware you could hope for. So much so, that you might want to convert this to a bug report.
Low-power 32 bit Pentium M. 4Gb ram. Installing onto a 750gb drive that runs fine in knoppix and I checked it against badblocks. Empty drive.
I used all three 32 bit debian disks, no problems there. Graphical install:
When I got to "Select and Install Software", everything went great for the 15 minutes; swimmingly, and it got all the way (or nearly) to the end of the progress bar and gave:
"An installation step failed. You can try to run the failing item again from the menu, or skip it and choose something else. The failing step is: Select and install software."
So, naturally I tried skipping it.
Went back to the next step on the list, which is installing grub.
"The "grub-pc" package failed to install into /target/. Without the GRUB boot loader, the installed system will not boot."
My hardware is pristine; ideal; not nuanced whatsoever; vanilla; tested; using the latest full release, not beta, Debian 9.2.1 i386. So you can't blame my particular system. (I've been a LAMP developer for 20 years.) We want to switch from CentOS to Debian but.... this is... we dipped our toe in and it burns, right?
I'm leaving the install window open on that box, ready when you are, to help fix your broken installer.
Please advise.