pyclass: add !Send compile_error test
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@ -26,6 +26,7 @@ fn test_compile_errors() {
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fn tests_rust_1_49(t: &trybuild::TestCases) {
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t.compile_fail("tests/ui/invalid_frompy_derive.rs");
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t.compile_fail("tests/ui/invalid_pymethod_receiver.rs");
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t.compile_fail("tests/ui/pyclass_send.rs");
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#[cfg(Py_LIMITED_API)]
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t.compile_fail("tests/ui/abi3_nativetype_inheritance.rs");
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@ -0,0 +1,25 @@
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use pyo3::prelude::*;
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use std::rc::Rc;
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#[pyclass]
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struct NotThreadSafe {
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data: Rc<i32>
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}
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fn main() {
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let gil = Python::acquire_gil();
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let py = gil.python();
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let obj = PyCell::new(py, NotThreadSafe { data: Rc::new(5) }).unwrap().to_object(py);
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drop(gil);
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std::thread::spawn(move || {
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let gil = Python::acquire_gil();
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let py = gil.python();
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// Uh oh, moved Rc to a new thread!
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let c: &PyCell<NotThreadSafe> = obj.as_ref(py).downcast().unwrap();
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assert_eq!(*c.borrow().data, 5);
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}).join().unwrap();
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}
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@ -0,0 +1,14 @@
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error[E0277]: `Rc<i32>` cannot be sent between threads safely
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--> $DIR/pyclass_send.rs:4:1
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4 | #[pyclass]
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| ^^^^^^^^^^ `Rc<i32>` cannot be sent between threads safely
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::: $WORKSPACE/src/pyclass.rs
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| pub struct ThreadCheckerStub<T: Send>(PhantomData<T>);
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| ---- required by this bound in `ThreadCheckerStub`
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= help: within `NotThreadSafe`, the trait `Send` is not implemented for `Rc<i32>`
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= note: required because it appears within the type `NotThreadSafe`
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= note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
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