Prevent infinite recursion of unit by adding a method unit(::Type{Any})

src/utils.jl

@@ -145,6 +145,19 @@ true
 @inline unit(x::Type{Missing}) = missing
 @inline unit(x::Missing) = missing
 
+"""
+    unit(::Type{Any})
+
+This method is here to prevent infinite recursion and to provide a helpful error message in case it occurs.
+"""
+@inline unit(x::Type{Any}) = throw( ArgumentError(
+    """
+    The method unit(Any) was called, but this method has no meaningful result.
+    The call may be due to calling unit(eltype(…)) on a container,
+    since eltype has a generic fallback method that returns Any.
+    """
+) )
+
 """
     absoluteunit(::Units)
     absoluteunit(::Quantity)