Downloader mode race

[ucwong]

No description provided.

[codecov]

Codecov Report

Merging #626 into master will increase coverage by 0.08%.
The diff coverage is 3.57%.

@@            Coverage Diff             @@
##           master     #626      +/-   ##
==========================================
+ Coverage   46.38%   46.46%   +0.08%     
==========================================
  Files         398      398              
  Lines       50707    50713       +6     
==========================================
+ Hits        23519    23565      +46     
+ Misses      25405    25374      -31     
+ Partials     1783     1774       -9     

Impacted Files	Coverage Δ
cmd/cortex/chaincmd.go	0.00% <0.00%> (ø)
ctxc/downloader/downloader.go	0.00% <0.00%> (ø)
ctxc/downloader/modes.go	0.00% <ø> (ø)
ctxc/handler.go	39.51% <100.00%> (ø)
p2p/simulations/mocker.go	33.63% <0.00%> (-1.82%)	⬇️
p2p/discv5/table.go	60.27% <0.00%> (-1.37%)	⬇️
p2p/rlpx.go	70.53% <0.00%> (-0.29%)	⬇️
p2p/server.go	66.98% <0.00%> (ø)
core/tx_pool.go	77.13% <0.00%> (+0.53%)	⬆️
rpc/client.go	81.69% <0.00%> (+0.70%)	⬆️
... and 8 more

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