Using latest GCC builds with VMware Workstation 12 Player some files are not shown in Explorer or CMD "dir". Steps to reproduce:
Create a new VMware machine and accept all defaults.
Open Rapps and download 7-zip and Mozilla Firefox 48.
Go to "https://github.com/reactos/reactos" and downlload project ZIP.
From downloaded ZIP extract "dll/apitests" to C:\.
Using 7-zip select all files in this directory and you will see that there are 212 files.
Using ReactOS Explorer to show the files and you will see that there are only 211 files.
Also, open a CMD prompt and navigate to the new c:\apitests directory and do a "dir" and there will only be 211 files here as well.
The attached patch seems to fix the problem for me.
This was first seen when I tried to do a "ninja bootcd" and a file in this directory was not found as shown in the attached screen shot.