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Improve CPython compatibility related with PyBoundMethod #7476

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Merged
youknowone merged 3 commits into from
Mar 20, 2026
+31 −7
Merged

Improve CPython compatibility related with PyBoundMethod #7476

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333af80
Add GetDescriptor for PyBoundMethod (return self)
moreal Mar 20, 2026
1a3fd9f
Add constructor validation for PyBoundMethod
moreal Mar 20, 2026
b725ca7
Fix PyBoundMethod __reduce__ to propagate errors
moreal Mar 20, 2026
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Fix PyBoundMethod __reduce__ to propagate errors 
Previously swallowed errors from get_attr with .ok(), silently
returning None. Now propagates errors matching CPython's method_reduce.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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@moreal @claude
moreal and claude committed Mar 20, 2026
commit b725ca7ecb04cedd5e026515c99ec90eec417db3
8 changes: 4 additions & 4 deletions crates/vm/src/builtins/function.rs
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Expand Up @@ -1291,11 +1291,11 @@ impl PyBoundMethod {
fn __reduce__(
&self,
vm: &VirtualMachine,
) -> (Option<PyObjectRef>, (PyObjectRef, Option<PyObjectRef>)) {
let builtins_getattr = vm.builtins.get_attr("getattr", vm).ok();
) -> PyResult<(PyObjectRef, (PyObjectRef, PyObjectRef))> {
let builtins_getattr = vm.builtins.get_attr("getattr", vm)?;
let func_self = self.object.clone();
let func_name = self.function.get_attr("__name__", vm).ok();
(builtins_getattr, (func_self, func_name))
let func_name = self.function.get_attr("__name__", vm)?;
Ok((builtins_getattr, (func_self, func_name)))
}

#[pygetset]
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