prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  `ak.fill_none(axis=None)` does nothing
  ### Version of Awkward Array
  
  main
  
  ### Description and code to reproduce
  
  The `apply` function for this case does not return (or recurse)
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `src/awkward/operations/ak_fill_none.py`
  Content:
  ```
  1 # BSD 3-Clause License; see https://github.com/scikit-hep/awkward-1.0/blob/main/LICENSE
  2 
  3 import numbers
  4 
  5 import awkward as ak
  6 
  7 np = ak.nplikes.NumpyMetadata.instance()
  8 
  9 
  10 def fill_none(array, value, axis=-1, highlevel=True, behavior=None):
  11     """
  12     Args:
  13         array: Data in which to replace None with a given value.
  14         value: Data with which to replace None.
  15         axis (None or int): If None, replace all None values in the array
  16             with the given value; if an int, The dimension at which this
  17             operation is applied. The outermost dimension is `0`, followed
  18             by `1`, etc., and negative values count backward from the
  19             innermost: `-1` is the innermost  dimension, `-2` is the next
  20             level up, etc.
  21         highlevel (bool): If True, return an #ak.Array; otherwise, return
  22             a low-level #ak.contents.Content subclass.
  23         behavior (None or dict): Custom #ak.behavior for the output array, if
  24             high-level.
  25 
  26     Replaces missing values (None) with a given `value`.
  27 
  28     For example, in the following `array`,
  29 
  30         ak.Array([[1.1, None, 2.2], [], [None, 3.3, 4.4]])
  31 
  32     The None values could be replaced with `0` by
  33 
  34         >>> ak.fill_none(array, 0)
  35         <Array [[1.1, 0, 2.2], [], [0, 3.3, 4.4]] type='3 * var * float64'>
  36 
  37     The replacement value doesn't strictly need the same type as the
  38     surrounding data. For example, the None values could also be replaced
  39     by a string.
  40 
  41         >>> ak.fill_none(array, "hi")
  42         <Array [[1.1, 'hi', 2.2], ... ['hi', 3.3, 4.4]] type='3 * var * union[float64, s...'>
  43 
  44     The list content now has a union type:
  45 
  46         >>> ak.type(ak.fill_none(array, "hi"))
  47         3 * var * union[float64, string]
  48 
  49     The values could be floating-point numbers or strings.
  50     """
  51     with ak._errors.OperationErrorContext(
  52         "ak.fill_none",
  53         dict(
  54             array=array, value=value, axis=axis, highlevel=highlevel, behavior=behavior
  55         ),
  56     ):
  57         return _impl(array, value, axis, highlevel, behavior)
  58 
  59 
  60 def _impl(array, value, axis, highlevel, behavior):
  61     arraylayout = ak.operations.to_layout(array, allow_record=True, allow_other=False)
  62     nplike = ak.nplikes.nplike_of(arraylayout)
  63 
  64     # Convert value type to appropriate layout
  65     if (
  66         isinstance(value, np.ndarray)
  67         and issubclass(value.dtype.type, (np.bool_, np.number))
  68         and len(value.shape) != 0
  69     ):
  70         valuelayout = ak.operations.to_layout(
  71             nplike.asarray(value)[np.newaxis], allow_record=False, allow_other=False
  72         )
  73     elif isinstance(value, (bool, numbers.Number, np.bool_, np.number)) or (
  74         isinstance(value, np.ndarray)
  75         and issubclass(value.dtype.type, (np.bool_, np.number))
  76     ):
  77         valuelayout = ak.operations.to_layout(
  78             nplike.asarray(value), allow_record=False, allow_other=False
  79         )
  80     elif (
  81         ak._util.is_sized_iterable(value)
  82         and not (isinstance(value, (str, bytes)))
  83         or isinstance(value, (ak.highlevel.Record, ak.record.Record))
  84     ):
  85         valuelayout = ak.operations.to_layout(
  86             value, allow_record=True, allow_other=False
  87         )
  88         if isinstance(valuelayout, ak.record.Record):
  89             valuelayout = valuelayout.array[valuelayout.at : valuelayout.at + 1]
  90         elif len(valuelayout) == 0:
  91             offsets = ak.index.Index64(
  92                 nplike.array([0, 0], dtype=np.int64), nplike=nplike
  93             )
  94             valuelayout = ak.contents.ListOffsetArray(offsets, valuelayout)
  95         else:
  96             valuelayout = ak.contents.RegularArray(valuelayout, len(valuelayout), 1)
  97     else:
  98         valuelayout = ak.operations.to_layout(
  99             [value], allow_record=False, allow_other=False
  100         )
  101 
  102     def maybe_fillna(layout):
  103         if layout.is_OptionType:
  104             return layout.fill_none(valuelayout)
  105         else:
  106             return layout
  107 
  108     if axis is None:
  109 
  110         def action(layout, depth, depth_context, **kwargs):
  111             layout = maybe_fillna(layout)
  112 
  113     else:
  114 
  115         def action(layout, depth, depth_context, **kwargs):
  116             posaxis = layout.axis_wrap_if_negative(depth_context["posaxis"])
  117             depth_context["posaxis"] = posaxis
  118             if posaxis + 1 < depth:
  119                 return layout
  120             elif posaxis + 1 == depth:
  121                 return maybe_fillna(layout)
  122 
  123     depth_context = {"posaxis": axis}
  124     out = arraylayout.recursively_apply(action, behavior, depth_context=depth_context)
  125 
  126     return ak._util.wrap(out, ak._util.behavior_of(array, behavior=behavior), highlevel)
  127
  ```
  --- END FILES ---
  
  Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.
  
  Here is an example:
  
  ```diff
  diff --git a/examples/server_async.py b/examples/server_async.py
  --- a/examples/server_async.py
  +++ b/examples/server_async.py
  @@ -313,4 +313,4 @@
   
   
   if __name__ == "__main__":
  -    asyncio.run(run_async_server("."), debug=True)
  +    asyncio.run(run_async_server(), debug=True)
  diff --git a/examples/server_sync.py b/examples/server_sync.py
  --- a/examples/server_sync.py
  +++ b/examples/server_sync.py
  @@ -313,5 +313,5 @@
   
   
   if __name__ == "__main__":
  -    server = run_sync_server(".")
  +    server = run_sync_server()
       server.shutdown()
  
  ```
  
golden_diff: diff --git a/src/awkward/operations/ak_fill_none.py b/src/awkward/operations/ak_fill_none.py
  --- a/src/awkward/operations/ak_fill_none.py
  +++ b/src/awkward/operations/ak_fill_none.py
  @@ -107,8 +107,8 @@
   
       if axis is None:
   
  -        def action(layout, depth, depth_context, **kwargs):
  -            layout = maybe_fillna(layout)
  +        def action(layout, continuation, **kwargs):
  +            return maybe_fillna(continuation())
   
       else:
  
verification_info: {"golden_diff": "diff --git a/src/awkward/operations/ak_fill_none.py b/src/awkward/operations/ak_fill_none.py\n--- a/src/awkward/operations/ak_fill_none.py\n+++ b/src/awkward/operations/ak_fill_none.py\n@@ -107,8 +107,8 @@\n \n     if axis is None:\n \n-        def action(layout, depth, depth_context, **kwargs):\n-            layout = maybe_fillna(layout)\n+        def action(layout, continuation, **kwargs):\n+            return maybe_fillna(continuation())\n \n     else:\n", "issue": "`ak.fill_none(axis=None)` does nothing\n### Version of Awkward Array\r\n\r\nmain\r\n\r\n### Description and code to reproduce\r\n\r\nThe `apply` function for this case does not return (or recurse)\n", "before_files": [{"content": "# BSD 3-Clause License; see https://github.com/scikit-hep/awkward-1.0/blob/main/LICENSE\n\nimport numbers\n\nimport awkward as ak\n\nnp = ak.nplikes.NumpyMetadata.instance()\n\n\ndef fill_none(array, value, axis=-1, highlevel=True, behavior=None):\n    \"\"\"\n    Args:\n        array: Data in which to replace None with a given value.\n        value: Data with which to replace None.\n        axis (None or int): If None, replace all None values in the array\n            with the given value; if an int, The dimension at which this\n            operation is applied. The outermost dimension is `0`, followed\n            by `1`, etc., and negative values count backward from the\n            innermost: `-1` is the innermost  dimension, `-2` is the next\n            level up, etc.\n        highlevel (bool): If True, return an #ak.Array; otherwise, return\n            a low-level #ak.contents.Content subclass.\n        behavior (None or dict): Custom #ak.behavior for the output array, if\n            high-level.\n\n    Replaces missing values (None) with a given `value`.\n\n    For example, in the following `array`,\n\n        ak.Array([[1.1, None, 2.2], [], [None, 3.3, 4.4]])\n\n    The None values could be replaced with `0` by\n\n        >>> ak.fill_none(array, 0)\n        <Array [[1.1, 0, 2.2], [], [0, 3.3, 4.4]] type='3 * var * float64'>\n\n    The replacement value doesn't strictly need the same type as the\n    surrounding data. For example, the None values could also be replaced\n    by a string.\n\n        >>> ak.fill_none(array, \"hi\")\n        <Array [[1.1, 'hi', 2.2], ... ['hi', 3.3, 4.4]] type='3 * var * union[float64, s...'>\n\n    The list content now has a union type:\n\n        >>> ak.type(ak.fill_none(array, \"hi\"))\n        3 * var * union[float64, string]\n\n    The values could be floating-point numbers or strings.\n    \"\"\"\n    with ak._errors.OperationErrorContext(\n        \"ak.fill_none\",\n        dict(\n            array=array, value=value, axis=axis, highlevel=highlevel, behavior=behavior\n        ),\n    ):\n        return _impl(array, value, axis, highlevel, behavior)\n\n\ndef _impl(array, value, axis, highlevel, behavior):\n    arraylayout = ak.operations.to_layout(array, allow_record=True, allow_other=False)\n    nplike = ak.nplikes.nplike_of(arraylayout)\n\n    # Convert value type to appropriate layout\n    if (\n        isinstance(value, np.ndarray)\n        and issubclass(value.dtype.type, (np.bool_, np.number))\n        and len(value.shape) != 0\n    ):\n        valuelayout = ak.operations.to_layout(\n            nplike.asarray(value)[np.newaxis], allow_record=False, allow_other=False\n        )\n    elif isinstance(value, (bool, numbers.Number, np.bool_, np.number)) or (\n        isinstance(value, np.ndarray)\n        and issubclass(value.dtype.type, (np.bool_, np.number))\n    ):\n        valuelayout = ak.operations.to_layout(\n            nplike.asarray(value), allow_record=False, allow_other=False\n        )\n    elif (\n        ak._util.is_sized_iterable(value)\n        and not (isinstance(value, (str, bytes)))\n        or isinstance(value, (ak.highlevel.Record, ak.record.Record))\n    ):\n        valuelayout = ak.operations.to_layout(\n            value, allow_record=True, allow_other=False\n        )\n        if isinstance(valuelayout, ak.record.Record):\n            valuelayout = valuelayout.array[valuelayout.at : valuelayout.at + 1]\n        elif len(valuelayout) == 0:\n            offsets = ak.index.Index64(\n                nplike.array([0, 0], dtype=np.int64), nplike=nplike\n            )\n            valuelayout = ak.contents.ListOffsetArray(offsets, valuelayout)\n        else:\n            valuelayout = ak.contents.RegularArray(valuelayout, len(valuelayout), 1)\n    else:\n        valuelayout = ak.operations.to_layout(\n            [value], allow_record=False, allow_other=False\n        )\n\n    def maybe_fillna(layout):\n        if layout.is_OptionType:\n            return layout.fill_none(valuelayout)\n        else:\n            return layout\n\n    if axis is None:\n\n        def action(layout, depth, depth_context, **kwargs):\n            layout = maybe_fillna(layout)\n\n    else:\n\n        def action(layout, depth, depth_context, **kwargs):\n            posaxis = layout.axis_wrap_if_negative(depth_context[\"posaxis\"])\n            depth_context[\"posaxis\"] = posaxis\n            if posaxis + 1 < depth:\n                return layout\n            elif posaxis + 1 == depth:\n                return maybe_fillna(layout)\n\n    depth_context = {\"posaxis\": axis}\n    out = arraylayout.recursively_apply(action, behavior, depth_context=depth_context)\n\n    return ak._util.wrap(out, ak._util.behavior_of(array, behavior=behavior), highlevel)\n", "path": "src/awkward/operations/ak_fill_none.py"}], "after_files": [{"content": "# BSD 3-Clause License; see https://github.com/scikit-hep/awkward-1.0/blob/main/LICENSE\n\nimport numbers\n\nimport awkward as ak\n\nnp = ak.nplikes.NumpyMetadata.instance()\n\n\ndef fill_none(array, value, axis=-1, highlevel=True, behavior=None):\n    \"\"\"\n    Args:\n        array: Data in which to replace None with a given value.\n        value: Data with which to replace None.\n        axis (None or int): If None, replace all None values in the array\n            with the given value; if an int, The dimension at which this\n            operation is applied. The outermost dimension is `0`, followed\n            by `1`, etc., and negative values count backward from the\n            innermost: `-1` is the innermost  dimension, `-2` is the next\n            level up, etc.\n        highlevel (bool): If True, return an #ak.Array; otherwise, return\n            a low-level #ak.contents.Content subclass.\n        behavior (None or dict): Custom #ak.behavior for the output array, if\n            high-level.\n\n    Replaces missing values (None) with a given `value`.\n\n    For example, in the following `array`,\n\n        ak.Array([[1.1, None, 2.2], [], [None, 3.3, 4.4]])\n\n    The None values could be replaced with `0` by\n\n        >>> ak.fill_none(array, 0)\n        <Array [[1.1, 0, 2.2], [], [0, 3.3, 4.4]] type='3 * var * float64'>\n\n    The replacement value doesn't strictly need the same type as the\n    surrounding data. For example, the None values could also be replaced\n    by a string.\n\n        >>> ak.fill_none(array, \"hi\")\n        <Array [[1.1, 'hi', 2.2], ... ['hi', 3.3, 4.4]] type='3 * var * union[float64, s...'>\n\n    The list content now has a union type:\n\n        >>> ak.type(ak.fill_none(array, \"hi\"))\n        3 * var * union[float64, string]\n\n    The values could be floating-point numbers or strings.\n    \"\"\"\n    with ak._errors.OperationErrorContext(\n        \"ak.fill_none\",\n        dict(\n            array=array, value=value, axis=axis, highlevel=highlevel, behavior=behavior\n        ),\n    ):\n        return _impl(array, value, axis, highlevel, behavior)\n\n\ndef _impl(array, value, axis, highlevel, behavior):\n    arraylayout = ak.operations.to_layout(array, allow_record=True, allow_other=False)\n    nplike = ak.nplikes.nplike_of(arraylayout)\n\n    # Convert value type to appropriate layout\n    if (\n        isinstance(value, np.ndarray)\n        and issubclass(value.dtype.type, (np.bool_, np.number))\n        and len(value.shape) != 0\n    ):\n        valuelayout = ak.operations.to_layout(\n            nplike.asarray(value)[np.newaxis], allow_record=False, allow_other=False\n        )\n    elif isinstance(value, (bool, numbers.Number, np.bool_, np.number)) or (\n        isinstance(value, np.ndarray)\n        and issubclass(value.dtype.type, (np.bool_, np.number))\n    ):\n        valuelayout = ak.operations.to_layout(\n            nplike.asarray(value), allow_record=False, allow_other=False\n        )\n    elif (\n        ak._util.is_sized_iterable(value)\n        and not (isinstance(value, (str, bytes)))\n        or isinstance(value, (ak.highlevel.Record, ak.record.Record))\n    ):\n        valuelayout = ak.operations.to_layout(\n            value, allow_record=True, allow_other=False\n        )\n        if isinstance(valuelayout, ak.record.Record):\n            valuelayout = valuelayout.array[valuelayout.at : valuelayout.at + 1]\n        elif len(valuelayout) == 0:\n            offsets = ak.index.Index64(\n                nplike.array([0, 0], dtype=np.int64), nplike=nplike\n            )\n            valuelayout = ak.contents.ListOffsetArray(offsets, valuelayout)\n        else:\n            valuelayout = ak.contents.RegularArray(valuelayout, len(valuelayout), 1)\n    else:\n        valuelayout = ak.operations.to_layout(\n            [value], allow_record=False, allow_other=False\n        )\n\n    def maybe_fillna(layout):\n        if layout.is_OptionType:\n            return layout.fill_none(valuelayout)\n        else:\n            return layout\n\n    if axis is None:\n\n        def action(layout, continuation, **kwargs):\n            return maybe_fillna(continuation())\n\n    else:\n\n        def action(layout, depth, depth_context, **kwargs):\n            posaxis = layout.axis_wrap_if_negative(depth_context[\"posaxis\"])\n            depth_context[\"posaxis\"] = posaxis\n            if posaxis + 1 < depth:\n                return layout\n            elif posaxis + 1 == depth:\n                return maybe_fillna(layout)\n\n    depth_context = {\"posaxis\": axis}\n    out = arraylayout.recursively_apply(action, behavior, depth_context=depth_context)\n\n    return ak._util.wrap(out, ak._util.behavior_of(array, behavior=behavior), highlevel)\n", "path": "src/awkward/operations/ak_fill_none.py"}]}