# astropy__astropy-7746
# Loki Mode Multi-Agent Patch
# Attempts: 1

Based on the issue description and the architect's analysis, I have enough context to generate the patch. The issue is in the `_array_converter` method in `astropy/wcs/wcs.py`. The fix needs to detect empty input arrays early and return empty arrays of the appropriate shape without calling the underlying WCSLIB function.

Looking at the traceback from the issue:
- Line 1223-1225: The `_return_list_of_arrays` function calls `func(xy, origin)` which fails for empty arrays
- Line 1267-1269: Returns from `_return_list_of_arrays(axes, origin)`

The fix should add a check for empty arrays in the `_return_list_of_arrays` inner function before calling `func`.

--- a/astropy/wcs/wcs.py
+++ b/astropy/wcs/wcs.py
@@ -1220,6 +1220,13 @@ class WCS(WCSBase):
         def _return_list_of_arrays(axes, origin):
             try:
                 axes = np.broadcast_arrays(*axes)
+            except ValueError:
+                pass
+            
+            # Handle empty input arrays - return empty arrays without calling WCSLIB
+            if len(axes) > 0 and len(axes[0]) == 0:
+                return [np.array([], dtype=np.float64) for _ in axes]
+            try:
                 xy = np.asarray(np.vstack(axes).T)
             except ValueError:
                 raise ValueError(