Tests fail on Windows (Visual Studio)

[GrimMaple]

Having compiled this GC using Visual Studio (CMake, clang-cl-x64), the tests fail:

---=[ GC tests
Unexpected number of collected bytes in strdup
Tests run: 12

However, if the log function is changed to use printf instead of fprintf. and the log level is raised to LOGLEVEL_DEBUG, tests pass. I don't know what kind of magic this is, but... it is what it is.