DDD 3.3.12 (i386-apple-darwin15.5.0) gets Xt error

[Steven Kaney]

I have installed ddd using homebrew on a MacBook Pro running OSX 10.11.6.  My DISPLAY is set to “/private/tmp/com.apple.launchd.pITzOMeZvh/org.macosforge.xquartz:0”.  The problem is 100% repeatable: just run ddd on a program compiled for debug using Xcode command line utilities.  I have xquartz 2.7.9 installed via brew cask.

Error: Unresolved inheritance operation

Xt error (Unresolved inheritance operation).

Oops!  You have found a bug in DDD.

If you can reproduce this bug, please send a bug report

to <address@hidden>, giving a subject like

    DDD 3.3.12 (i386-apple-darwin15.5.0) gets Xt error

To enable us to fix the bug, you should include the following information:

* What you were doing to get this message.  Report all the facts.

* The contents of the `~/.ddd/log' file as generated by this session.

Please read also the section "Reporting Bugs" in the DDD manual.

We thank you for your support.

ddd: Cannot save options