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JuliaLang · Feb 15, 2021 · 9ba3d81 · 9ba3d81
1 parent b72fd8f
commit 9ba3d81
Showing 1 changed file with 7 additions and 3 deletions.
diff --git a/base/essentials.jl b/base/essentials.jl
@@ -257,10 +257,14 @@ end
 
 function rewrap_unionall(t::Core.TypeofVararg, @nospecialize(u))
     isdefined(t, :T) || return t
-    if !isdefined(t, :N) || (isa(u, UnionAll) && t.N === u.var)
-        return Vararg{rewrap_unionall(t.T, u)}
+    if !isa(u, UnionAll)
+        return t
+    end
+    T = rewrap_unionall(t.T, u)
+    if !isdefined(t, :N) || t.N === u.var
+        return Vararg{T}
     end
-    Vararg{rewrap_unionall(t.T, u), t.N}
+    return Vararg{T, t.N}
 end
 
 # replace TypeVars in all enclosing UnionAlls with fresh TypeVars