Back in 2010 I submitted a small feature to allow the creation of minidumps when backends crashed; see commit dcb09b595f88a3bca6097a6acc17bf2ec935d55f .
At the time Windows lacked useful support for postmortem debugging and crash-dump management in the operating system its self, especially for applications running as services. That has since improved considerably.
The feature was also included in 9.4, which I think was the PostgreSQL release that was really rock solid on Windows. Consequently it's never served the purpose I wrote it for, a way to make it easy to get crash data from end users into the hands of a developer without needing to remote-debug the users' system.
It's practically dead code and we might as well remove it unless there's someone out there using it who's keeping quiet about it.
