[Bug fortran/88768] Derived type io in conjunction with allocatable component and recursion fails

[mscfd at gmx dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88768

--- Comment #2 from martin <mscfd at gmx dot net> ---
If I add the "generic :: write(unformatted) => write_unformatted" part in my
code (but do not use it), I see other failures somehow triggered by openmp
parallelisation (no recursion involved). Using the address sanitizer I can see
that one thread tries to access some memory already freed by another thread.
However, the concerned variables (of what is type(t) in the example code above)
are thread private and in fact several subroutine calls and modules away from
the openmp parallelisation block.

Unfortunately so far I was not able to produce a simple test case. However, it
looks like that the DT IO part uses some kind of global addresses, which does
not work well with recursion or threading?