safeDump produces invalid YAML if there's an anchor in an array item

[olydis]

I assume you basically use safeDump from js-yaml, so the bug might originate there; but here is what happens:

Reproducing Object

const x = {};
x.a = [{ c: 345 }];
x.b = x.a[0];

[email protected] dumps

a:
  - &ref_0c: 345
b: *ref_0

[email protected] dumps

a:
  - &ref_0
    c: 345
b: *ref_0

Problem

Note that what yaml-ast-parser dumps is invalid YAML. The anchor is directly concatenated with key c.