[mejrs]

This is invalid as the no_mangle attribute has no meaning on foreign statics.

This crate surfaced in a recent crater run, where 56 crates started failing with errors like:

error: the `no_mangle` attribute cannot be used on foreign statics
   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/i-slint-backend-qt-0.3.5/qt_accessible.rs:116:9
    |
116 | /         cpp!(unsafe [obj as "QObject*"] {
117 | |             QTimer::singleShot(0, [obj = QPointer(obj)]() {
118 | |                 if (!obj)
119 | |                     return;
...   |
129 | |             });
130 | |         });
    | |__________^
    |
    = help: the `no_mangle` attribute can be applied to functions and statics
    = note: this error originates in the macro `__cpp_closure_impl` which comes from the expansion of the macro `cpp` (in Nightly builds, run with -Z macro-backtrace for more info)