Fixed Self-Reference Substitution

[troizky]

According to documentation: https://github.com/lightbend/config/blob/master/HOCON.md#examples-of-self-referential-substitutions

A self-reference resolves to the value "below" even if it's part of a path expression. So for example:

foo : { a : { c : 1 } }
foo : ${foo.a}
foo : { a : 2 }

Here, ${foo.a} would refer to { c : 1 } rather than 2 and so the final merge would be { a : 2, c : 1 }.
Recall that for a field to be self-referential, it must have a substitution or value concatenation as its value. If a field has an object or array value, for example, then it is not self-referential even if there is a reference to the field itself inside that object or array.

But I'm getting crash in cases below:

"a": {"b": 27},
"obj": ${a}
# below is failing
"val": ${obj.b}

a = {aa = mama}
b = ${a} { bb = mia }
# below is failing
b.aa = mea
b.bb = culpa

Open Issue #105

[puppetcla]

CLA signed by all contributors.

[MikaelSmith]

Why remove these tests? Decided they duplicated others?

[MikaelSmith]

This all looks sane.

[MikaelSmith]

Thanks so much for looking into this!