Circumvent type-instability of deepcopy

JuliaLang · Sep 26, 2015 · c1d28cf · c1d28cf
1 parent 262d6ba
commit c1d28cf
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Showing 2 changed files with 2 additions and 2 deletions.
diff --git a/base/deepcopy.jl b/base/deepcopy.jl
@@ -5,7 +5,7 @@
 # Note: deepcopy_internal(::Any, ::ObjectIdDict) is
 #       only exposed for specialization by libraries
 
-deepcopy(x) = deepcopy_internal(x, ObjectIdDict())
+deepcopy(x) = deepcopy_internal(x, ObjectIdDict())::typeof(x)
 
 deepcopy_internal(x::Union{Symbol,LambdaStaticData,TopNode,GlobalRef,
                            DataType,Union,Task},

diff --git a/test/copy.jl b/test/copy.jl
@@ -50,7 +50,7 @@ end
 
 # test behavior of shallow and deep copying
 let a = Any[[1]], q = QuoteNode([1])
-    ca = copy(a); dca = deepcopy(a)
+    ca = copy(a); dca = @inferred(deepcopy(a))
     @test ca !== a
     @test ca[1] === a[1]
     @test dca !== a