Fix empty case.

src/broadcast.jl

@@ -108,21 +108,17 @@ first_statictype() = error("unresolved dest type")
 
 @inline function _broadcast(f, sz::Size{newsize}, s::Tuple{Vararg{Size}}, a...) where newsize
     first_staticarray = first_statictype(a...)
+    if prod(newsize) == 0
+        # Use inference to get eltype in empty case (see also comments in _map)
+        eltys = Tuple{map(eltype, a)...}
+        T = Core.Compiler.return_type(f, eltys)
+        @inbounds return similar_type(first_staticarray, T, Size(newsize))()
+    end
     elements = __broadcast(f, sz, s, a...)
     @inbounds return similar_type(first_staticarray, eltype(elements), Size(newsize))(elements)
 end
 
 @generated function __broadcast(f, ::Size{newsize}, s::Tuple{Vararg{Size}}, a...) where newsize
-    if prod(newsize) == 0
-        # Use inference to get eltype in empty case (see also comments in _map)
-        eltys = [:(eltype(a[$i])) for i ∈ 1:length(a)]
-        return quote
-            @_inline_meta
-            T = Core.Compiler.return_type(f, Tuple{$(eltys...)})
-            @inbounds return similar_type($first_staticarray, T, Size(newsize))()
-        end
-    end
-
     sizes = [sz.parameters[1] for sz ∈ s.parameters]
     indices = CartesianIndices(newsize)
     exprs = similar(indices, Expr)