invalid argument for command iline

[eseiler]

Describe the bug
After #8632, I'm getting warnings when using \if.

/*!\brief Some struct
 * \if DEV
 * Some conditional stuff
 * \endif
 */
struct S{};

/*!\brief Some other struct
 * \if DEV Some conditional stuff \endif
 */
struct T{};

This will emit:

/run/shm/example/example.hpp:2: warning: invalid argument for command iline
/run/shm/example/example.hpp:9: warning: invalid argument for command iline
/run/shm/example/example.hpp:2: warning: invalid argument for command iline
/run/shm/example/example.hpp:9: warning: invalid argument for command iline

This is independent of whether DEV is added to ENABLED_SECTIONS or not.
Except for the warning, the behaviour is otherwise the same, i.e. the if is evaluated correctly and the resulting documentation does not change.

Expected behavior
No warning, or, if syntactical error, point to what is wrong.

To Reproduce
example.tar.gz

Version
fc67a82
Any version before #8632 will work.

[albert-github]

Looks like a mean interaction between the \brief command and the, internal \iline command (the \iline is necessary to get proper line numbers in warnings in case the \if command is used).

Adding an empty line before the \if command is a workaround for the problem.

[albert-github]

I've just pushed a proposed patch, pull request #8644

[albert-github]

Code has been integrated in master on github, closing issue as it was only present in master.