The source is already included in the error, so it is redundant, eg: pprof http://nowhere.nothere Currently produces: http://nowhere.nothere: http fetch http://nowhere.nothere: Get http://nowhere.nothere: dial tcp: lookup nowhere.nothere: no such host With this commit: http://nowhere.nothere: http fetch: Get http://nowhere.nothere: dial tcp: lookup nowhere.nothere: no such host