Unlink of locked file fails on shared folder

[egooo]

I noticed that some programs crash, when working on data in a shared folder. I recorded the file operations with strace and was able to write a small program, that reproduces the error. The attached program basically acquires a lock on a file and then tries to delete it before closing.

To reproduce the error, execute the attached program in a Linux guest, on a Windows host. It prints "Test failed" when being executed in a shared folder. When executed outside the shared folder, it prints "Test passed."