fix: explicitly check for Cell type in primitives

marimo/_runtime/executor.py

@@ -246,9 +246,9 @@ def sanitize_inputs(
                     except TypeError as e:
                         raise CloneError(
                             f"Could not clone reference `{ref}` of type "
-                            f"{getattr(glbls[ref], '__module__', '<module>')}."
-                            f"{glbls[ref].__class__.__name__}"
-                            " try wrapping the object in a `zero_copy`"
+                            f"{getattr(glbls[ref], '__module__', '<module>')}. "
+                            f"{glbls[ref].__class__.__name__} "
+                            "try wrapping the object in a `zero_copy` "
                             "call. If this is a common object type, consider "
                             "making an issue on the marimo GitHub "
                             "repository to never deepcopy."

marimo/_runtime/primitives.py

@@ -7,6 +7,7 @@
 from typing import TYPE_CHECKING, Any, Callable, Optional, Union
 
 from marimo._ast.visitor import Name, VariableData
+from marimo._ast.cell import Cell
 
 if TYPE_CHECKING:
     from marimo._runtime.dataflow import DirectedGraph
@@ -130,6 +131,9 @@ def is_instance_by_name(obj: object, name: str) -> bool:
 
 
 def is_unclonable_type(obj: object) -> bool:
+    # Cell objects in particular are hidden by functools.wraps.
+    if isinstance(obj, Cell):
+        return True
     return any([is_instance_by_name(obj, name) for name in UNCLONABLE_TYPES])