message: we use as_fail witch was introduced in failure = "0.1.2"
diff: @@ -14,7 +14,7 @@ license = "Apache-2.0/MIT"
  [dependencies]
  criterion-plot = { path="plot", version="0.2.4", optional = true }
  criterion-stats = { path="stats", version="0.2.4" }
  -failure = "0.1.1"
  +failure = "0.1.2"
  failure_derive = "0.1.1"
  itertools = "0.7"
  itertools-num = "0.1"
  