Duplicate (double) documentation generated for friend function

[scott-zhong]

Describe the bug
Duplicate (double) documentation generated for friend function. See the following testcase

/**
 * A docs
 */
class A
{
public:
    friend A operator*(const A& x, const A& y);
};

/**
 * \relates A
 * 
 * A operator* docs
 */
A operator*(const A& x, const A& y);

/**
 * B docs
 */
template <typename T>
class B
{
public:
    /**
     * B operator* docs
     */
    T operator*(void) const
    {
        return T();
    }
};

A operator*() is documented twice in Doxygen 1.8.18 - Doxygen trunk (eb11063*)

Screenshots
Doxygen 1.8.17:

Doxygen 1.8.18 - trunk (eb11063*)

To Reproduce
testcase.zip

Expected behavior
Single instance of A operator*() documentation

Version
1.8.18 - trunk (eb11063*)

[albert-github]

It looks like the difference is the result of:

369e821fc6870e9e6b30aa13d59592c12c760800 is the first bad commit
Date:   Wed Apr 8 22:10:56 2020 +0200

    Replaced MemberNameSDict by MemberNameLinkedMap based on LinkedMap

 src/clangparser.cpp  |    8 +-
 src/classdef.cpp     |   62 +-
 src/code.l           |   40 +-
 src/context.cpp      |   36 +-
 src/doxygen.cpp      | 1980 ++++++++++++++++++++++++--------------------------
 src/doxygen.h        |    6 +-
 src/fortrancode.l    |  193 ++---
 src/membername.cpp   |   43 +-
 src/membername.h     |   42 +-
 src/namespacedef.cpp |  138 ++--
 src/pre.l            |   15 +-
 src/searchindex.cpp  |   20 +-
 src/util.cpp         |   80 +-
 13 files changed, 1231 insertions(+), 1432 deletions(-)

[scott-zhong]

I think this is the same bug with template and friend function.

/**
 * A docs
 */
template< class T >
class A
{
public:

    friend A<double> fun(const A<double>& v);
};

/**
 * \relates A
 * fun docs
 */
A<double> fun(const A<double>& V);

/**
 * B docs
 */
template< class T >
class B
{
public:

    friend B<double> fun(const B<double>& v);
};

1.8.17

1.8.18 - trunk (eb11063)

[doxygen]

@scott-zhong Please verify if the referenced commit fixes the problem for you. Do not close the issue, this will be done automatically when the next official release becomes available.

[scott-zhong]

@doxygen This does fix it. Thank you!!!

[doxygen]

This issue was previously marked 'fixed but not released',
which means it should be fixed in doxygen version 1.11.0.
Please verify if this is indeed the case. Reopen the
issue if you think it is not fixed and please include any additional information
that you think can be relevant (preferably in the form of a self-contained example).