[Bug fortran/77327] AddressSanitizer: heap-use-after-free gcc-trunk-239276/gcc/fortran/interface.c:403 in compare_components

[zeccav at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77327

--- Comment #8 from Vittorio Zecca <zeccav at gmail dot com> ---
Yes, it seems to me that import4.f90 is sufficient to trigger the asan
memory checker.

How strange, even without "implicit none" the loader should have complained
that "sub2" was referenced but undefined. This is how I find the bug.

It is not that trivial to build a sanitized version of
gcc/g++/gfortran but nonetheless
it is possible.

Once you have a sanitized gfortran and f951 then you can check it
against the gcc testsuite
Fortran files, as I did.