improve error message when the router hander definition is not standrad

[gqcn]

No description provided.

[codecov-commenter]

Codecov Report

Patch and project coverage have no change.

Comparison is base (56f5d51) 78.61% compared to head (fc01286) 78.62%.

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Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2528   +/-   ##
=======================================
  Coverage   78.61%   78.62%           
=======================================
  Files         630      630           
  Lines       51388    51388           
=======================================
+ Hits        40401    40403    +2     
+ Misses       9001     8999    -2     
  Partials     1986     1986           

Flag	Coverage Δ
go-1.15-386	78.64% <0.00%> (ø)
go-1.15-amd64	78.65% <0.00%> (-0.01%)	⬇️
go-1.16-386	78.65% <0.00%> (+0.02%)	⬆️
go-1.16-amd64	78.64% <0.00%> (+<0.01%)	⬆️
go-1.17-386	78.66% <0.00%> (+0.02%)	⬆️
go-1.17-amd64	78.65% <0.00%> (+<0.01%)	⬆️
go-1.18-386	78.60% <0.00%> (+0.04%)	⬆️
go-1.18-amd64	78.59% <0.00%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
net/ghttp/ghttp_server_service_handler.go	59.70% <0.00%> (ø)

... and 1 file with indirect coverage changes

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