An error is reported when compiling after "go-bindata -pkg webserver -o bindata.go webfiles/"

error message:

github.com/salesforce/sloop/pkg/sloop/webserver

pkg/sloop/webserver/debug.go:99:70: undefined: _webfilesDebugviewkeyHtml
pkg/sloop/webserver/debug.go:205:72: undefined: _webfilesDebuglistkeysHtml
pkg/sloop/webserver/debug.go:346:66: undefined: _webfilesDebughistogramHtml
pkg/sloop/webserver/debug.go:361:68: undefined: _webfilesDebugconfigHtml
pkg/sloop/webserver/debug.go:376:56: undefined: _webfilesDebugHtml
pkg/sloop/webserver/debug.go:401:80: undefined: _webfilesDebugtablesHtml
pkg/sloop/webserver/indexhandler.go:24:56: undefined: _webfilesIndexHtml
pkg/sloop/webserver/resourcehandler.go:58:62: undefined: _webfilesResourceHtml
make: *** [all] Error 2