[Bf-committers] Error building on Windows, with OSL's oslc.exe, "Permission denied"

[Campbell Barton]

Recently I tried to build Blender on a MSVC, 64bit, with a fresh CMake
config, using default configuration.
(since I had a report it was broken).

The build failed, because oslc.exe fails to run.
Even on a fresh checkout of "lib/win64_vc12/osl"

Just executing it on the command line as admin prints "Permission denied",

This could be a problem running inside VirtualBox, but so far all
other executables from our "lib/win64_vc12/" run fine.

Is this a known issue?