argmin ranges bug: you cannot pass an unsorted array to searchsorted

Author: vtjnash

base/range.jl

@@ -705,7 +705,7 @@ function argmin(r::AbstractRange)
     elseif step(r) > 0
         firstindex(r)
     else
-        first(searchsorted(r, last(r)))
+        lastindex(r)
     end
 end
 
@@ -720,7 +720,7 @@ function argmax(r::AbstractRange)
     if isempty(r)
         throw(ArgumentError("range must be non-empty"))
     elseif step(r) > 0
-        first(searchsorted(r, last(r)))
+        lastindex(r)
     else
         firstindex(r)
     end