RustPython · youknowone · Jan 24, 2026 · Jan 24, 2026 · Jan 24, 2026
diff --git a/Cargo.toml b/Cargo.toml
@@ -222,7 +222,6 @@ wasm-bindgen = "0.2.106"
 unsafe_code = "allow"
 unsafe_op_in_unsafe_fn = "deny"
 elided_lifetimes_in_paths = "warn"
-missing_copy_implementations = "warn"
 
 [workspace.lints.clippy]
 # alloc_instead_of_core = "warn"

diff --git a/crates/vm/src/anystr.rs b/crates/vm/src/anystr.rs
@@ -16,13 +16,13 @@ pub struct SplitArgs<T: TryFromObject> {
     maxsplit: isize,
 }
 
-#[derive(Clone, Copy, FromArgs)]
+#[derive(FromArgs)]
 pub struct SplitLinesArgs {
     #[pyarg(any, default = false)]
     pub keepends: bool,
 }
 
-#[derive(Clone, Copy, FromArgs)]
+#[derive(FromArgs)]
 pub struct ExpandTabsArgs {
     #[pyarg(any, default = 8)]
     tabsize: isize,

diff --git a/crates/vm/src/builtins/descriptor.rs b/crates/vm/src/builtins/descriptor.rs
@@ -168,21 +168,19 @@ impl Representable for PyMethodDescriptor {
     }
 }
 
-#[derive(Clone, Copy, Debug)]
+#[derive(Debug)]
 pub enum MemberKind {
     Bool = 14,
     ObjectEx = 16,
 }
 
 pub type MemberSetterFunc = Option<fn(&VirtualMachine, PyObjectRef, PySetterValue) -> PyResult<()>>;
 
-#[derive(Clone, Copy)]
 pub enum MemberGetter {
     Getter(fn(&VirtualMachine, PyObjectRef) -> PyResult),
     Offset(usize),
 }
 
-#[derive(Clone, Copy)]
 pub enum MemberSetter {
     Setter(MemberSetterFunc),
     Offset(usize),

diff --git a/crates/vm/src/builtins/module.rs b/crates/vm/src/builtins/module.rs
@@ -9,7 +9,7 @@ use crate::{
 };
 
 #[pyclass(module = false, name = "module")]
-#[derive(Clone, Copy, Debug)]
+#[derive(Debug)]
 pub struct PyModuleDef {
     // pub index: usize,
     pub name: &'static PyStrInterned,
@@ -26,7 +26,7 @@ pub type ModuleCreate =
     fn(&VirtualMachine, &PyObject, &'static PyModuleDef) -> PyResult<PyRef<PyModule>>;
 pub type ModuleExec = fn(&VirtualMachine, &Py<PyModule>) -> PyResult<()>;
 
-#[derive(Clone, Copy, Default)]
+#[derive(Default)]
 pub struct PyModuleSlots {
     pub create: Option<ModuleCreate>,
     pub exec: Option<ModuleExec>,
@@ -83,7 +83,7 @@ impl PyModuleDef {
 
 #[allow(clippy::new_without_default)] // avoid Default implementation
 #[pyclass(module = false, name = "module")]
-#[derive(Clone, Copy, Debug)]
+#[derive(Debug)]
 pub struct PyModule {
     // PyObject *md_dict;
     pub def: Option<&'static PyModuleDef>,

diff --git a/crates/vm/src/builtins/namespace.rs b/crates/vm/src/builtins/namespace.rs
@@ -14,8 +14,8 @@ use crate::{
 ///
 /// SimpleNamespace(**kwargs)
 #[pyclass(module = "types", name = "SimpleNamespace")]
-#[derive(Copy, Clone, Debug, Default)]
-pub struct PyNamespace;
+#[derive(Debug, Default)]
+pub struct PyNamespace {}
 
 impl PyPayload for PyNamespace {
     #[inline]

diff --git a/crates/vm/src/builtins/object.rs b/crates/vm/src/builtins/object.rs
@@ -18,7 +18,7 @@ use itertools::Itertools;
 /// When called, it accepts no arguments and returns a new featureless
 /// instance that has no instance attributes and cannot be given any.
 #[pyclass(module = false, name = "object")]
-#[derive(Clone, Copy, Debug)]
+#[derive(Debug)]
 pub struct PyBaseObject;
 
 impl PyPayload for PyBaseObject {

diff --git a/crates/vm/src/builtins/singletons.rs b/crates/vm/src/builtins/singletons.rs
@@ -9,7 +9,7 @@ use crate::{
 };
 
 #[pyclass(module = false, name = "NoneType")]
-#[derive(Clone, Copy, Debug)]
+#[derive(Debug)]
 pub struct PyNone;
 
 impl PyPayload for PyNone {
@@ -75,7 +75,7 @@ impl AsNumber for PyNone {
 }
 
 #[pyclass(module = false, name = "NotImplementedType")]
-#[derive(Clone, Copy, Debug)]
+#[derive(Debug)]
 pub struct PyNotImplemented;
 
 impl PyPayload for PyNotImplemented {

diff --git a/crates/vm/src/builtins/slice.rs b/crates/vm/src/builtins/slice.rs
@@ -301,7 +301,7 @@ impl Representable for PySlice {
 }
 
 #[pyclass(module = false, name = "EllipsisType")]
-#[derive(Copy, Clone, Debug)]
+#[derive(Debug)]
 pub struct PyEllipsis;
 
 impl PyPayload for PyEllipsis {

diff --git a/crates/vm/src/builtins/zip.rs b/crates/vm/src/builtins/zip.rs
@@ -24,7 +24,7 @@ impl PyPayload for PyZip {
     }
 }
 
-#[derive(Clone, Copy, FromArgs)]
+#[derive(FromArgs)]
 pub struct PyZipNewArgs {
     #[pyarg(named, optional)]
     strict: OptionalArg<bool>,

diff --git a/crates/vm/src/dict_inner.rs b/crates/vm/src/dict_inner.rs
@@ -124,7 +124,7 @@ struct DictEntry<T> {
 }
 static_assertions::assert_eq_size!(DictEntry<PyObjectRef>, Option<DictEntry<PyObjectRef>>);
 
-#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+#[derive(Debug, PartialEq, Eq)]
 pub struct DictSize {
     indices_size: usize,
     pub entries_size: usize,

diff --git a/crates/vm/src/function/method.rs b/crates/vm/src/function/method.rs
@@ -63,7 +63,7 @@ macro_rules! define_methods {
     };
 }
 
-#[derive(Clone, Copy)]
+#[derive(Clone)]
 pub struct PyMethodDef {
     pub name: &'static str, // TODO: interned
     pub func: &'static dyn PyNativeFn,
@@ -270,7 +270,7 @@ impl core::fmt::Debug for PyMethodDef {
 // This is not a part of CPython API.
 // But useful to support dynamically generated methods
 #[pyclass(name, module = false, ctx = "method_def")]
-#[derive(Clone, Copy, Debug)]
+#[derive(Debug)]
 pub struct HeapMethodDef {
     method: PyMethodDef,
 }

diff --git a/crates/vm/src/function/number.rs b/crates/vm/src/function/number.rs
@@ -14,7 +14,7 @@ use num_traits::PrimInt;
 /// method, this method will first be called to convert the object into a float.
 /// If `__complex__()` is not defined then it falls back to `__float__()`. If
 /// `__float__()` is not defined it falls back to `__index__()`.
-#[derive(Clone, Copy, Debug, PartialEq)]
+#[derive(Debug, PartialEq)]
 #[repr(transparent)]
 pub struct ArgIntoComplex {
     value: Complex64,
@@ -52,7 +52,7 @@ impl TryFromObject for ArgIntoComplex {
 /// If the object is not a Python floating point object but has a `__float__()`
 /// method, this method will first be called to convert the object into a float.
 /// If `__float__()` is not defined then it falls back to `__index__()`.
-#[derive(Clone, Copy, Debug, PartialEq)]
+#[derive(Debug, PartialEq)]
 #[repr(transparent)]
 pub struct ArgIntoFloat {
     value: f64,
@@ -95,7 +95,7 @@ impl TryFromObject for ArgIntoFloat {
 /// By default an object is considered true unless its class defines either a
 /// `__bool__()` method that returns False or a `__len__()` method that returns
 /// zero, when called with the object.
-#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
+#[derive(Debug, Default, PartialEq, Eq)]
 pub struct ArgIntoBool {
     value: bool,
 }

diff --git a/crates/vm/src/protocol/buffer.rs b/crates/vm/src/protocol/buffer.rs
@@ -14,7 +14,6 @@ use alloc::borrow::Cow;
 use core::{fmt::Debug, ops::Range};
 use itertools::Itertools;
 
-#[derive(Clone, Copy)]
 pub struct BufferMethods {
     pub obj_bytes: fn(&PyBuffer) -> BorrowedValue<'_, [u8]>,
     pub obj_bytes_mut: fn(&PyBuffer) -> BorrowedValueMut<'_, [u8]>,

diff --git a/crates/vm/src/protocol/mapping.rs b/crates/vm/src/protocol/mapping.rs
@@ -48,7 +48,7 @@ impl PyMappingSlots {
 }
 
 #[allow(clippy::type_complexity)]
-#[derive(Clone, Copy, Default)]
+#[derive(Default)]
 pub struct PyMappingMethods {
     pub length: Option<fn(PyMapping<'_>, &VirtualMachine) -> PyResult<usize>>,
     pub subscript: Option<fn(PyMapping<'_>, &PyObject, &VirtualMachine) -> PyResult>,

diff --git a/crates/vm/src/protocol/sequence.rs b/crates/vm/src/protocol/sequence.rs
@@ -70,7 +70,7 @@ impl PySequenceSlots {
 }
 
 #[allow(clippy::type_complexity)]
-#[derive(Clone, Copy, Default)]
+#[derive(Default)]
 pub struct PySequenceMethods {
     pub length: Option<fn(PySequence<'_>, &VirtualMachine) -> PyResult<usize>>,
     pub concat: Option<fn(PySequence<'_>, &PyObject, &VirtualMachine) -> PyResult>,

diff --git a/crates/vm/src/sliceable.rs b/crates/vm/src/sliceable.rs
@@ -252,7 +252,6 @@ impl<T: Clone> SliceableSequenceOp for [T] {
     }
 }
 
-#[derive(Clone, Copy)]
 pub enum SequenceIndex {
     Int(isize),
     Slice(SaturatedSlice),
@@ -404,7 +403,6 @@ impl SaturatedSlice {
     }
 }
 
-#[derive(Clone, Copy)]
 pub struct SaturatedSliceIter {
     index: isize,
     step: isize,

diff --git a/crates/vm/src/stdlib/marshal.rs b/crates/vm/src/stdlib/marshal.rs
@@ -25,7 +25,6 @@ mod decl {
     #[pyattr(name = "version")]
     use marshal::FORMAT_VERSION;
 
-    #[derive(Clone, Copy)]
     pub struct DumpError;
 
     impl marshal::Dumpable for PyObjectRef {

diff --git a/crates/vm/src/stdlib/os.rs b/crates/vm/src/stdlib/os.rs
@@ -35,7 +35,7 @@ impl crate::convert::IntoPyException for rustix::io::Errno {
 }
 
 #[allow(dead_code)]
-#[derive(FromArgs, Default, Copy, Clone)]
+#[derive(FromArgs, Default)]
 pub struct TargetIsDirectory {
     #[pyarg(any, default = false)]
     pub(crate) target_is_directory: bool,

diff --git a/crates/vm/src/stdlib/typevar.rs b/crates/vm/src/stdlib/typevar.rs
@@ -988,7 +988,7 @@ pub(crate) mod typevar {
 
     #[pyattr]
     #[pyclass(name = "Generic", module = "typing")]
-    #[derive(Copy, Clone, Debug, PyPayload)]
+    #[derive(Debug, PyPayload)]
     #[allow(dead_code)]
     pub struct Generic;
 

diff --git a/crates/vm/src/stdlib/typing.rs b/crates/vm/src/stdlib/typing.rs
@@ -49,7 +49,7 @@ pub(crate) mod decl {
     }
 
     #[pyclass(no_attr, name = "NoDefaultType", module = "typing")]
-    #[derive(Clone, Copy, Debug, PyPayload)]
+    #[derive(Debug, PyPayload)]
     pub struct NoDefault;
 
     #[pyclass(with(Constructor, Representable), flags(BASETYPE))]