Exception when resolving links in docstrings of deferred bound methods

[ZedThree]

[Issue] when resolving links in the docstring of deferred bound methods. For example:

module hello_mod
    implicit none

    private

    type, public, abstract :: foo_t
        contains
        !> See [[bar]] for more information
        procedure(foo_iface), public, deferred :: foo
    end type

    abstract interface
        subroutine foo_iface(self)
            import :: foo_t
            class(foo_t), intent(in) :: self
        end subroutine
    end interface

    public bar

contains

    !> More details about [[foo_t]] API
    subroutine bar
    end subroutine
end module

leads to:

Attribute error

  Parsing files         ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 100% 1/1 0:00:00 0:00:00 ../src/hello.f90
  Correlating information from different parts of your project...
  ...done in 0.000s
⠋ Processing comments   ━━━━━━━━━━━━━━━━━━━━╺━━━━━━━━━━━━━━━━━━━  50% 4/8 0:00:01 0:00:00 foo
Traceback (most recent call last):
  File "/home/adrien/.pyenv/versions/3.11.4/bin/ford", line 8, in <module>
    sys.exit(run())
             ^^^^^
  File "/home/adrien/.pyenv/versions/3.11.4/lib/python3.11/site-packages/ford/__init__.py", line 491, in run
    main(proj_data, proj_docs)
  File "/home/adrien/.pyenv/versions/3.11.4/lib/python3.11/site-packages/ford/__init__.py", line 446, in main
    project.markdown(md, base_url)
  File "/home/adrien/.pyenv/versions/3.11.4/lib/python3.11/site-packages/ford/fortran_project.py", line 403, in markdown
    item.markdown(md)
  File "/home/adrien/.pyenv/versions/3.11.4/lib/python3.11/site-packages/ford/sourceform.py", line 405, in markdown
    self.doc = md.reset().convert(
               ^^^^^^^^^^^^^^^^^^^
  File "/home/adrien/.pyenv/versions/3.11.4/lib/python3.11/site-packages/ford/_markdown.py", line 119, in convert
    return super().convert(source)
           ^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/adrien/.pyenv/versions/3.11.4/lib/python3.11/site-packages/markdown/core.py", line 258, in convert
    newRoot = treeprocessor.run(root)
              ^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/adrien/.pyenv/versions/3.11.4/lib/python3.11/site-packages/markdown/treeprocessors.py", line 367, in run
    self.__handleInline(text), child
    ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/adrien/.pyenv/versions/3.11.4/lib/python3.11/site-packages/markdown/treeprocessors.py", line 127, in __handleInline
    data, matched, startIndex = self.__applyPattern(
                                ^^^^^^^^^^^^^^^^^^^^
  File "/home/adrien/.pyenv/versions/3.11.4/lib/python3.11/site-packages/markdown/treeprocessors.py", line 268, in __applyPattern
    node, start, end = pattern.handleMatch(match, data)
                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/adrien/.pyenv/versions/3.11.4/lib/python3.11/site-packages/ford/_markdown.py", line 236, in handleMatch
    return self.convert_link(m), m.start(0), m.end(0)
           ^^^^^^^^^^^^^^^^^^^^
  File "/home/adrien/.pyenv/versions/3.11.4/lib/python3.11/site-packages/ford/_markdown.py", line 201, in convert_link
    item = find_child(context)
           ^^^^^^^^^^^^^^^^^^^
  File "/home/adrien/.pyenv/versions/3.11.4/lib/python3.11/site-packages/ford/_markdown.py", line 198, in find_child
    return context.find_child(name, m["entity"])
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/adrien/.pyenv/versions/3.11.4/lib/python3.11/site-packages/ford/sourceform.py", line 583, in find_child
    return _find_in_list(collection, name)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/adrien/.pyenv/versions/3.11.4/lib/python3.11/site-packages/ford/sourceform.py", line 108, in _find_in_list
    if name == item.name.lower():
               ^^^^^^^^^
AttributeError: 'str' object has no attribute 'name'

Here is a mwe for convenience:

ford_name_resol_test.tar.gz

Originally posted by @amorison in #583 (comment)

[amorison]

I confirm that this solves the issue, thanks!