Building a fresh checkout of [84de05583b0631640bcb0f697345f4743c74da0b] within MSYS on Windows 7 and running "make test" produces the following failed test:

==== fCmd-9.4.a file rename: comprehensive: dir to new name FAILED
==== Contents of test case:

    file mkdir td1 td2
    testchmod 0o555 td2
    file rename td1 td3
    file rename td2 td4
    list [lsort [glob td*]] [file writable td3] [file writable td4]

---- Test generated error; Return code was: 1
---- Return code should have been one of: 0 2
---- errorInfo: error renaming "td2" to "td4": permission denied
    while executing
"file rename td2 td4"
    ("uplevel" body line 5)
    invoked from within
"uplevel 1 $script"
---- errorCode: POSIX EACCES {permission denied}
==== fCmd-9.4.a FAILED