Handle session close during connection, KeyError: <aiohttp.connector.…

[fafhrd91]

…_TransportPlaceholder> #2193

[codecov-io]

Codecov Report

Merging #2282 into master will decrease coverage by 0.01%.
The diff coverage is 85.71%.

@@            Coverage Diff             @@
##           master    #2282      +/-   ##
==========================================
- Coverage   97.25%   97.24%   -0.02%     
==========================================
  Files          39       39              
  Lines        8091     8095       +4     
  Branches     1408     1410       +2     
==========================================
+ Hits         7869     7872       +3     
  Misses         97       97              
- Partials      125      126       +1

Impacted Files	Coverage Δ
aiohttp/connector.py	97.6% <85.71%> (-0.19%)	⬇️

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[asvetlov]

Looks good!

[asvetlov]

@fafhrd91 could you make a test for fixing partial coverage blame?
If not -- I could live with it.
Your code is safe, the change is obvious.
I'm talking just about raising coverage level a bit.
If we'll merge the PR as is -- nobody will write a test for the case, sure.

[lock]

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