use more general fix suggested by @vtjnash

Author: thchr

base/number.jl

@@ -4,7 +4,7 @@
 
 # Numbers are convertible
 convert(::Type{T}, x::T)      where {T<:Number} = x
-convert(::Type{T}, x::Number) where {T<:Number} = T(x)
+convert(::Type{T}, x::Number) where {T<:Number} = T(x)::T
 
 """
     isinteger(x) -> Bool

base/range.jl

@@ -816,12 +816,11 @@ let bigints = Union{Int, UInt, Int64, UInt64, Int128, UInt128},
 end
 
 first(r::OrdinalRange{T}) where {T} = convert(T, r.start)
-first(r::OneTo{T}) where {T} = oneunit(T) :: Integer
+first(r::OneTo{T}) where {T} = oneunit(T)
 first(r::StepRangeLen) = unsafe_getindex(r, 1)
 first(r::LinRange) = r.start
 
 last(r::OrdinalRange{T}) where {T} = convert(T, r.stop) # via steprange_last
-last(r::OneTo{T}) where {T} = r.stop :: Integer
 last(r::StepRangeLen) = unsafe_getindex(r, length(r))
 last(r::LinRange) = r.stop