From 9fde56985ae91765d87f644bfe60bcb102007609 Mon Sep 17 00:00:00 2001
From: Gabriel Baraldi <baraldi@usp.br>
Date: Mon, 4 Oct 2021 15:44:44 -0300
Subject: [PATCH 1/2] Fix broadcasting allocating

---
 base/broadcast.jl |  4 ++--
 test/broadcast.jl | 10 ++++++++++
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/base/broadcast.jl b/base/broadcast.jl
index d5daab992390c..971727768a4be 100644
--- a/base/broadcast.jl
+++ b/base/broadcast.jl
@@ -941,8 +941,8 @@ broadcast_unalias(::Nothing, src) = src
 preprocess(dest, x) = extrude(broadcast_unalias(dest, x))
 
 @inline preprocess_args(dest, args::Tuple) = (preprocess(dest, args[1]), preprocess_args(dest, tail(args))...)
-preprocess_args(dest, args::Tuple{Any}) = (preprocess(dest, args[1]),)
-preprocess_args(dest, args::Tuple{}) = ()
+@inline preprocess_args(dest, args::Tuple{Any}) = (preprocess(dest, args[1]),)
+@inline preprocess_args(dest, args::Tuple{}) = ()
 
 # Specialize this method if all you want to do is specialize on typeof(dest)
 @inline function copyto!(dest::AbstractArray, bc::Broadcasted{Nothing})
diff --git a/test/broadcast.jl b/test/broadcast.jl
index 38950dd10b5b0..4e7220abcba02 100644
--- a/test/broadcast.jl
+++ b/test/broadcast.jl
@@ -1058,3 +1058,13 @@ end
     @test println.(buf, [1,2,3]) == [nothing, nothing, nothing]
     @test String(take!(buf)) == "1\n2\n3\n"
 end
+
+@testset "Memory allocation inconsistency in broadcasting #41565" begin
+    function test(y)
+        y .= 0 .- y ./ (y.^2) # extra allocation
+        return y
+    end
+    arr = rand(1000)
+    @allocated test(arr)
+    @test (@allocated test(arr)) == 0
+end
\ No newline at end of file

From 3086ecb5b6dcf0aa47d23d50cb0f37445b8a244e Mon Sep 17 00:00:00 2001
From: Gabriel Baraldi <baraldi@usp.br>
Date: Mon, 4 Oct 2021 15:47:15 -0300
Subject: [PATCH 2/2] add newline

---
 test/broadcast.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/broadcast.jl b/test/broadcast.jl
index 4e7220abcba02..1cad14de44c5f 100644
--- a/test/broadcast.jl
+++ b/test/broadcast.jl
@@ -1067,4 +1067,4 @@ end
     arr = rand(1000)
     @allocated test(arr)
     @test (@allocated test(arr)) == 0
-end
\ No newline at end of file
+end