fix older JAX

Author: crusaderky

array_api_compat/common/_helpers.py

@@ -800,8 +800,11 @@ def to_device(x: Array, device: Device, /, *, stream: Optional[Union[int, Any]]
         raise ValueError(f"Unsupported device {device!r}")
     elif is_jax_array(x):
         if not hasattr(x, "__array_namespace__"):
-            # In JAX v0.4.31 and older, this import adds to_device method to x.
+            # In JAX v0.4.31 and older, this import adds to_device method to x...
             import jax.experimental.array_api # noqa: F401
+            # ... but only on eager JAX. It won't work inside jax.jit.
+            if not hasattr(x, "to_device"):
+                return x
         return x.to_device(device, stream=stream)
     elif is_pydata_sparse_array(x) and device == _device(x):
         # Perform trivial check to return the same array if