chain index fix

[ucwong]

No description provided.

[codecov]

Codecov Report

Merging #916 (2015a59) into master (130f947) will increase coverage by 0.02%.
The diff coverage is 50.00%.

❗ Current head 2015a59 differs from pull request most recent head aed6d61. Consider uploading reports for the commit aed6d61 to get more accurate results

@@            Coverage Diff             @@
##           master     #916      +/-   ##
==========================================
+ Coverage   49.39%   49.41%   +0.02%     
==========================================
  Files         415      415              
  Lines       46545    46531      -14     
==========================================
+ Hits        22989    22993       +4     
+ Misses      21555    21544      -11     
+ Partials     2001     1994       -7     

Impacted Files	Coverage Δ
core/rawdb/chain_iterator.go	60.25% <50.00%> (+0.25%)	⬆️
rlp/raw.go	78.98% <0.00%> (-5.74%)	⬇️
trie/sync_bloom.go	54.28% <0.00%> (-5.72%)	⬇️
whisper/whisperv6/message.go	66.23% <0.00%> (-1.30%)	⬇️
rpc/client.go	81.56% <0.00%> (-0.79%)	⬇️
ctxc/filters/api.go	44.60% <0.00%> (-0.75%)	⬇️
p2p/server.go	65.09% <0.00%> (-0.43%)	⬇️
ctxc/downloader/downloader.go	76.75% <0.00%> (+0.21%)	⬆️
trie/proof.go	73.78% <0.00%> (+0.32%)	⬆️
p2p/discover/v5_udp.go	81.06% <0.00%> (+0.53%)	⬆️
... and 8 more