GNU DDD 3.3.12 (i386-apple-darwin20.1.0)
Copyright (C) 1995-1999 Technische Universität Braunschweig, Germany.
Copyright (C) 1999-2001 Universität Passau, Germany.
Copyright (C) 2001 Universität des Saarlandes, Germany.
Copyright (C) 2001-2009 Free Software Foundation, Inc.

Compiled with GCC Apple LLVM 12.0.0 (clang-1200.0.32.27)
Requires X11R6, Xt11R7, Motif 2.3.8 (Motif Version 2.3.8)
Includes XPM 3.4.11, Athena Panner (7000002L), Manual, App defaults, DDD core
Built 2020-11-17 by (unknown).
$  ddd
!  Xt error: Unresolved inheritance operation
!  Xt error
!  Cannot save options