As reported on the Orca mailing list by David E. Price.

(I don't know if there is a better alternate place to file
this. It wasn't obvious. Filing it under Orca for now, so that
it doesn't get lost).

Problems building the Access Bridge 1.5.0. Various warning messages
are now gone, but the following two errors remain:

../../../../impl/org/GNOME/Accessibility/TextImpl.java:28: org.GNOME.Accessibility.TextImpl is not abstract and does not override abstract method getDefaultAttributeSet() in org.GNOME.Accessibility.TextOperations
public class TextImpl extends UnknownImpl implements TextOperations {
       ^
EditableTextImpl.java:29: org.GNOME.Accessibility.EditableTextImpl is not abstract and does not override abstract method getDefaultAttributeSet() in org.GNOME.Accessibility.TextOperations
public class EditableTextImpl extends TextImpl implements EditableTextOperations {
       ^
2 errors
make[4]: *** [EditableTextImpl.class] Error 1
make[3]: *** [all-recursive] Error 1
make[2]: *** [all-recursive] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all-recursive] Error 1