compilation error with go version go1.10.3 linux/amd64

[nephaste]

impossible to compile it with latest Go 1.10.3

github.com/qiniu/log
github.com/robfig/cron
github.com/codeskyblue/webcron

github.com/codeskyblue/webcron

src/github.com/codeskyblue/webcron/keeper.go:93:13: cannot assign to xe.ShowSQL
src/github.com/codeskyblue/webcron/keeper.go:124:13: cannot assign to xe.ShowSQL
src/github.com/codeskyblue/webcron/keeper.go:126:13: cannot assign to xe.ShowSQL