[Bug fortran/89174] [8/9 Regression] Allocation segfault with CLASS(*) MOLD

[tkoenig at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89174

--- Comment #6 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
And on my AMD system, it does indeed pass with r265170. OK.

Looking at the diff of the tree dumps between the two versions,
the difference is

--- a.r265170   2019-02-24 10:56:39.138713129 +0100
+++ a.r265171   2019-02-24 10:56:59.598888069 +0100
@@ -229,10 +229,7 @@
     }
   (struct __vtype__STAR *) this->_data->mold._vptr = (struct __vtype__STAR *)
((struct __class__STAR_t *) value)->_vptr;
   this->_data->mold._len = ((struct __class__STAR_t *) value)->_len;
-  if (this->_data->mold._vptr->_def_init != 0B)
-    {
-      (void) __builtin_memcpy (this->_data->mold._data, (void *)
this->_data->mold._vptr->_def_init, (unsigned long)
this->_data->mold._vptr->_size);
-    }
+  (void) __builtin_memcpy (this->_data->mold._data, (void *)
this->_data->mold._vptr->_def_init, (unsigned long)
this->_data->mold._vptr->_size);
 }


so there is a NULL pointer check missing from the code compiled with
r265171.