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Fix PyCode constructor/replace by youknowone · Pull Request #6193 · RustPython/RustPython · GitHub

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Fix PyCode constructor/replace #6193

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Merged
youknowone merged 2 commits into from
Oct 22, 2025
Conversation 20 Commits 2 Checks 11 Files changed
Merged

Fix PyCode constructor/replace #6193

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f2e19bd
Fix PyCode constructor
youknowone Oct 16, 2025
2166a05
Reuse MarshalError
youknowone Oct 22, 2025
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6 changes: 0 additions & 6 deletions Lib/test/test_code.py
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Original file line number Diff line number Diff line change
Expand Up @@ -222,8 +222,6 @@ class List(list):
obj = List([1, 2, 3])
self.assertEqual(obj[0], "Foreign getitem: 1")

# TODO: RUSTPYTHON
@unittest.expectedFailure
def test_constructor(self):
def func(): pass
co = func.__code__
Expand Down Expand Up @@ -255,8 +253,6 @@ def test_qualname(self):
CodeTest.test_qualname.__qualname__
)

# TODO: RUSTPYTHON
@unittest.expectedFailure
def test_replace(self):
def func():
x = 1
Expand Down Expand Up @@ -297,8 +293,6 @@ def func2():
self.assertEqual(new_code.co_varnames, code2.co_varnames)
self.assertEqual(new_code.co_nlocals, code2.co_nlocals)

# TODO: RUSTPYTHON
@unittest.expectedFailure
def test_nlocals_mismatch(self):
def func():
x = 1
Expand Down
2 changes: 0 additions & 2 deletions Lib/test/test_funcattrs.py
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Original file line number Diff line number Diff line change
Expand Up @@ -65,8 +65,6 @@ def duplicate():
return 3
self.assertNotEqual(self.b, duplicate)

# TODO: RUSTPYTHON
@unittest.expectedFailure
def test_copying___code__(self):
def test(): pass
self.assertEqual(test(), None)
Expand Down
22 changes: 14 additions & 8 deletions compiler/core/src/marshal.rs
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Expand Up @@ -165,6 +165,19 @@ impl<'a> ReadBorrowed<'a> for &'a [u8] {
}
}

/// Parses bytecode bytes into CodeUnit instructions.
/// Each instruction is 2 bytes: opcode and argument.
pub fn parse_instructions_from_bytes(bytes: &[u8]) -> Result<Box<[CodeUnit]>> {
bytes
.chunks_exact(2)
.map(|cu| {
let op = Instruction::try_from(cu[0])?;
let arg = OpArgByte(cu[1]);
Ok(CodeUnit { op, arg })
})
.collect()
}

pub struct Cursor<B> {
pub data: B,
pub position: usize,
Expand All @@ -185,14 +198,7 @@ pub fn deserialize_code<R: Read, Bag: ConstantBag>(
) -> Result<CodeObject<Bag::Constant>> {
let len = rdr.read_u32()?;
let instructions = rdr.read_slice(len * 2)?;
let instructions = instructions
.chunks_exact(2)
.map(|cu| {
let op = Instruction::try_from(cu[0])?;
let arg = OpArgByte(cu[1]);
Ok(CodeUnit { op, arg })
})
.collect::<Result<Box<[CodeUnit]>>>()?;
let instructions = parse_instructions_from_bytes(instructions)?;

let len = rdr.read_u32()?;
let locations = (0..len)
Expand Down
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