Rule Definer: Error on new rule

[Kingloko]

Description

Adding a rule from workbase causes an error, while adding the exact same rule via the console is fine.

Environment

1. Grakn version: Grakn Core 1.5.2
2. OS of Grakn server: Ubuntu 16.4
3. Workbase version: 1.2.1
4. OS of Workbase: Ubuntu 18.04
5. Other environment details:

Reproducible Steps

Steps to create the smallest reproducible scenario:
It seems I cant upload screen shots, but one is available in slack.
The following is the text I supplied to the form:
name: gp_rule2
when:

(parent: $a, child: $b) isa parentOf;
(parent: $b, child: $c) isa parentOf;

then:

(gprnt: $a, gc: $c) isa grandparentOf;

Expected Output

rule added without a problem

Actual Output

no viable alternative at input '{(parent: $a, child: $b) isa parentOf;\n(parent: $b, child: $c) isa parentOf;\n}'
syntax error at line 3:
}
 ^

Additional information

I tried creating this exact same rule via the console and had no problem:

define
------

person sub entity,
    plays gc,
    plays gprnt,
    plays child,
    plays parent;

parentOf sub relation,
    relates child,
    relates parent;

grandparentOf sub relation,
    relates gprnt,
    relates gc;

gp sub rule,
when{
(parent: $a, child: $b) isa parentOf;
(parent: $b, child: $c) isa parentOf;
}, then {
(gprnt: $a, gc: $c) isa grandparentOf;
};

[Irtazaraza]

Is a nodejs-client bug: refer to vaticle/typedb-driver-nodejs#42

[sorsaffari]

@Irtazaraza we need to follow up with the issue you have referred the author to.