编译失败 undefined: sort.Slice

make all
go build -v -o ./bin/server
github.com/asaskevich/govalidator
# github.com/asaskevich/govalidator
../../asaskevich/govalidator/types.go:27: undefined: sort.Slice
make[1]: *** [all] Error 2
make: *** [build] Error 2

Reproduce the failure with `make all` and inspect the reported dependency file `../../asaskevich/govalidator/types.go` around the `sort.Slice` reference. Check the Go build and dependency context shown by the error; done means `make all` completes without the undefined `sort.Slice` failure.

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