(RustPython) ➜  RustPython git:(master) ✗ cargo build
    Blocking waiting for file lock on build directory
   Compiling rustpython-vm v0.1.2 (//RustPython/vm)
error[E0277]: the trait bound `for<'r> fn(&'r vm::VirtualMachine, function::OptionalArg<pyobject::PyRef<obj::objstr::PyString>>) -> std::result::Result<std::sync::Arc<pyobject::PyObject<(dyn pyobject::PyObjectPayload + 'static)>>, pyobject::PyRef<exceptions::PyBaseException>> {stdlib::os::_os::error}: function::IntoPyNativeFunc<_, _, _>` is not satisfied
   --> vm/src/stdlib/os.rs:277:8
    |
277 |     fn error(vm: &VirtualMachine, message: OptionalArg<PyStringRef>) -> PyResult {
    |        ^^^^^ the trait `function::IntoPyNativeFunc<_, _, _>` is not implemented for `for<'r> fn(&'r vm::VirtualMachine, function::OptionalArg<pyobject::PyRef<obj::objstr::PyString>>) -> std::result::Result<std::sync::Arc<pyobject::PyObject<(dyn pyobject::PyObjectPayload + 'static)>>, pyobject::PyRef<exceptions::PyBaseException>> {stdlib::os::_os::error}`

error: aborting due to previous error

(RustPython) ➜  RustPython git:(master) ✗ cargo build
    Blocking waiting for file lock on build directory
   Compiling rustpython-vm v0.1.2 (//RustPython/vm)
error[E0277]: the trait bound `for<'r> fn(stdlib::os::_os::DirEntry, stdlib::os::FollowSymlinks, &'r vm::VirtualMachine) -> std::result::Result<bool, pyobject::PyRef<exceptions::PyBaseException>> {stdlib::os::_os::DirEntry::is_dir}: function::IntoPyNativeFunc<_, _, _>` is not satisfied
   --> vm/src/stdlib/os.rs:435:12
    |
435 |         fn is_dir(self, follow_symlinks: FollowSymlinks, vm: &VirtualMachine) -> PyResult<bool> {
    |            ^^^^^^ the trait `function::IntoPyNativeFunc<_, _, _>` is not implemented for `for<'r> fn(stdlib::os::_os::DirEntry, stdlib::os::FollowSymlinks, &'r vm::VirtualMachine) -> std::result::Result<bool, pyobject::PyRef<exceptions::PyBaseException>> {stdlib::os::_os::DirEntry::is_dir}`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0277`.
error: could not compile `rustpython-vm`.

To learn more, run the command again with --verbose.

(RustPython) ➜  RustPython git:(master) ✗ cargo build
    Blocking waiting for file lock on build directory
   Compiling rustpython-vm v0.1.2 (/Users/youknowone/Projects/RustPython/vm)
error[E0308]: mismatched types
   --> vm/src/stdlib/io.rs:630:25
    |
630 |                         &os::PyPathLike::new_str(name.as_str().to_owned()),
    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |                         |
    |                         expected struct `stdlib::os::PyPathLike`, found `&stdlib::os::PyPathLike`
    |                         help: consider removing the borrow: `os::PyPathLike::new_str(name.as_str().to_owned())`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0308`.
error: could not compile `rustpython-vm`.

To learn more, run the command again with --verbose.