attribute_goals/3 existence error while following "Attributed Variables" chapter

[jasonhemann]

Following the "Attributed Variables" chapter https://www.metalevel.at/prolog/attributedvariables, in a fresh REPL using scryer-prolog version "v0.9.0-63-gc490d818", I constructed a file attrmod.pl, and then attempted to use it at toplevel.

%% File attrmod.pl
:- module(attrmod, []).
:- use_module(library(atts)).
:- attribute a/1.

?- consult('/path/to/attrmod.pl').
   true.
?- attrmod:put_atts(X, a(test)).
caught: error(existence_error(procedure,attribute_goals/3),attribute_goals/3)

I did not expect this behavior. Perhaps a default implementation of attribute_goals in the suggested attrmod.pl file?

[triska]

Thank you, I have filed this as an issue for Scryer Prolog: mthom/scryer-prolog#1432.

[triska]

This is now corrected in Scryer Prolog via mthom/scryer-prolog@ed89c43!