https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78055
--- Comment #2 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
As a test, try this patch.
diff --git a/libgfortran/io/io.h b/libgfortran/io/io.h
index edc520a9..00ced533 100644
--- a/libgfortran/io/io.h
+++ b/libgfortran/io/io.h
@@ -514,6 +514,7 @@ typedef struct st_parameter_dt
large enough to hold a complex value (two reals) of the
largest kind. */
char value[32];
+ GFC_IO_INT not_used;
formatted_dtio fdtio_ptr;
unformatted_dtio ufdtio_ptr;
} p;
Maybe it is an alignment issue???
