cmd: Add warning for type convert instead

[Xuanwo]

Signed-off-by: Xuanwo [email protected]

[codecov]

Codecov Report

Merging #670 (74329b7) into master (385b5ea) will not change coverage.
The diff coverage is n/a.

❗ Current head 74329b7 differs from pull request most recent head 7519cc0. Consider uploading reports for the commit 7519cc0 to get more accurate results

@@           Coverage Diff           @@
##           master     #670   +/-   ##
=======================================
  Coverage   21.09%   21.09%           
=======================================
  Files          21       21           
  Lines         806      806           
=======================================
  Hits          170      170           
  Misses        629      629           
  Partials        7        7           

Flag	Coverage Δ
unittests	21.09% <ø> (ø)

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