Don't return a pointer from 'alias'.

[maleadt]

No description provided.

[codecov]

Codecov Report

Merging #513 into master will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #513   +/-   ##
=======================================
  Coverage   80.53%   80.53%           
=======================================
  Files         166      166           
  Lines        8878     8878           
=======================================
  Hits         7150     7150           
  Misses       1728     1728           

Impacted Files	Coverage Δ
src/pool.jl	72.91% <100.00%> (ø)

---

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 025f286...421928f. Read the comment docs.