Fix Stack Overflow for Debug::fmt

[jcdickinson]

This Pull Request fixes/closes #608.

It changes the following:

• Adds RecursionLimiter. This tracks the GcObject pointers that have been visited during a Debug::fmt call.
• Adds a test for the stack overflow.

The same object cannot appear twice in the output, by design. JS object graphs tend the be huge, and comprehending a massive data dump is nearly impossible. If the same object appears twice, even if not recursive, it is always elided. The following graph:

let a = {};
a.c = a;
let b = {
 d: a, e: a
};
debug(b);

Would print:

{
  d: {
    c: ... // Recursion protected
  },
  e: ... // Will never appear twice
}

[codecov]

Codecov Report

Merging #630 into master will increase coverage by 0.06%.
The diff coverage is 95.00%.

@@            Coverage Diff             @@
##           master     #630      +/-   ##
==========================================
+ Coverage   72.56%   72.62%   +0.06%     
==========================================
  Files         179      179              
  Lines       13259    13279      +20     
==========================================
+ Hits         9621     9644      +23     
+ Misses       3638     3635       -3     

Impacted Files	Coverage Δ
boa/src/builtins/object/gcobject.rs	84.84% <93.33%> (+7.07%)	⬆️
boa/src/builtins/value/tests.rs	100.00% <100.00%> (ø)
boa/src/builtins/function/mod.rs	73.05% <0.00%> (+2.39%)	⬆️

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[Razican]

I like how this was done :)
I added some comments, mostly to add a bit of documentation and to maybe improve the debug output if you agree.

Thanks!

[HalidOdat]

Looks perfect to me! :)

[Razican]

Almost ready! I just found one undocumented static.

[jcdickinson]

Windows check failed with no logs, not sure if I can rerun it?

[HalidOdat]

Windows check failed with no logs, not sure if I can rerun it?

That is strange. Ill rerun it :)