Fix gc track for iterator and pair_list.

[iemelyanov]

Resolve #320

Only iterators and pair_list contains this bug.

[codecov]

Codecov Report

Merging #321 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #321   +/-   ##
=======================================
  Coverage   93.48%   93.48%           
=======================================
  Files          10       10           
  Lines         936      936           
=======================================
  Hits          875      875           
  Misses         61       61

---

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[codecov]

Codecov Report

Merging #321 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #321   +/-   ##
=======================================
  Coverage   93.48%   93.48%           
=======================================
  Files          10       10           
  Lines         936      936           
=======================================
  Hits          875      875           
  Misses         61       61

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 7be235c...862b940. Read the comment docs.

[asvetlov]

I think views should be tracked as well

[iemelyanov]

I think views should be tracked as well

Mb I am missing something but all objects created by gc_new in views don't have this problem.

[asvetlov]

You are right, sorry.
I did look on outdated sources.

[asvetlov]

LGTM, please merge

[iemelyanov]

LGTM, please merge

What I should use for merge - "Squash and merge" or "Rebase and merge"? :)

[asvetlov]

Squash.
Please re-read the squashed commit message.
If it is too long or contains non-valuable lines like Fixed tests etc -- edit the message before committing.

[iemelyanov]

Squash.
Please re-read the squashed commit message.
If it is too long or contains non-valuable lines like Fixed tests etc -- edit the message before committing.

Ok. I understand. Thank you.