Handle chr() range checks without Rust integer overflow (#7422)

moreal · web-flow · commit 21d549caf6a8 · 2026-03-14T15:47:45.000+09:00
diff --git a/Lib/test/test_builtin.py b/Lib/test/test_builtin.py
@@ -367,7 +367,6 @@ class C3(C2): pass
         c3 = C3()
         self.assertTrue(callable(c3))
 
-    @unittest.expectedFailure # TODO: RUSTPYTHON; OverflowError: Python int too large to convert to Rust isize
     def test_chr(self):
         self.assertEqual(chr(0), '\0')
         self.assertEqual(chr(32), ' ')
diff --git a/crates/vm/src/stdlib/builtins.rs b/crates/vm/src/stdlib/builtins.rs
@@ -88,7 +88,7 @@ mod builtins {
     #[pyfunction]
     fn chr(i: PyIntRef, vm: &VirtualMachine) -> PyResult<CodePoint> {
         let value = i
-            .try_to_primitive::<isize>(vm)?
+            .as_bigint()
             .to_u32()
             .and_then(CodePoint::from_u32)
             .ok_or_else(|| vm.new_value_error("chr() arg not in range(0x110000)"))?;
