engine switch fix

[ucwong]

No description provided.

[codecov]

Codecov Report

Merging #362 (f365884) into master (555da42) will decrease coverage by 0.25%.
The diff coverage is 53.07%.

❗ Current head f365884 differs from pull request most recent head 61dadb1. Consider uploading reports for the commit 61dadb1 to get more accurate results

@@            Coverage Diff             @@
##           master     #362      +/-   ##
==========================================
- Coverage   40.16%   39.91%   -0.25%     
==========================================
  Files          12       12              
  Lines        2684     2703      +19     
==========================================
+ Hits         1078     1079       +1     
- Misses       1499     1515      +16     
- Partials      107      109       +2     

Impacted Files	Coverage Δ
backend/chaindb.go	0.00% <0.00%> (ø)
backend/handler.go	49.49% <51.80%> (+0.70%)	⬆️
backend/torrent.go	51.70% <54.34%> (-4.97%)	⬇️
fs.go	32.88% <72.97%> (+0.87%)	⬆️

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 4bb9f0b...61dadb1. Read the comment docs.