------- Comment #1 from burnus at gcc dot gnu dot org 2007-11-24 23:02 ------- Some debugging notes. While the following crashes C_NULL_PTR1 = transfer(0_C_INTPTR_T, C_NULL_PTR1) it works after replacing the constant by a variable.
In gfc_simplify_transfer (for the constant expression), /* And read the buffer back into the new expression. */ gfc_target_interpret_expr (buffer, buffer_size, result); is called. Here, "result" is of the type(c_ptr), i.e. ts.type == BT_DERIVED. As it is not a real derived type calling gfc_interpret_derived fails (segfault); converting it into INTEGER works in principle, but it fails in the "C_NULL_PTR1 =" assignment step as one cannot assign an integer to a derived type. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34199
