From 477fd0a1d9e30202ec4a34a8177bdbc469c5df67 Mon Sep 17 00:00:00 2001
From: Curtis Vogt <curtis.vogt@gmail.com>
Date: Thu, 11 Jan 2024 15:34:48 -0600
Subject: [PATCH] Define `VersionNumber(::VersionNumber)`

---
 Project.toml     | 2 +-
 README.md        | 3 +++
 src/Compat.jl    | 5 +++++
 test/runtests.jl | 6 ++++++
 4 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/Project.toml b/Project.toml
index fdb0ead33..96ae2400a 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "Compat"
 uuid = "34da2185-b29b-5c13-b0c7-acf172513d20"
-version = "4.11.0"
+version = "4.12.0"
 
 [deps]
 Dates = "ade2ca70-3891-5945-98fb-dc099432e06a"
diff --git a/README.md b/README.md
index 17ce22b9d..126df2a8c 100644
--- a/README.md
+++ b/README.md
@@ -120,6 +120,8 @@ changes in `julia`.
 
 * `pkgversion(m::Module)` returns the version of the package that loaded a given module ([#45607]) (since Compat 4.11)
 
+* `VersionNumber(::VersionNumber)` defined as a no-op constructor ([#45052]) (since Compat 4.12)
+
 ## Developer tips
 
 One of the most important rules for `Compat.jl` is to avoid breaking user code
@@ -172,6 +174,7 @@ Note that you should specify the correct minimum version for `Compat` in the
 [#43334]: https://github.com/JuliaLang/julia/issues/43334
 [#43354]: https://github.com/JuliaLang/julia/issues/43354
 [#43852]: https://github.com/JuliaLang/julia/issues/43852
+[#45052]: https://github.com/JuliaLang/julia/issues/45052
 [#45607]: https://github.com/JuliaLang/julia/issues/45607
 [#46104]: https://github.com/JuliaLang/julia/issues/46104
 [#48038]: https://github.com/JuliaLang/julia/issues/48038
diff --git a/src/Compat.jl b/src/Compat.jl
index 751355a1f..c8bb90f24 100644
--- a/src/Compat.jl
+++ b/src/Compat.jl
@@ -770,6 +770,11 @@ if VERSION < v"1.7.0-DEV.1187"
     export redirect_stdio
 end
 
+# https://github.com/JuliaLang/julia/pull/45052
+if VERSION < v"1.9.0-DEV.461"
+    Base.VersionNumber(v::VersionNumber) = v
+end
+
 include("deprecated.jl")
 
 end # module Compat
diff --git a/test/runtests.jl b/test/runtests.jl
index 2268b610c..2b6e95ceb 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -728,3 +728,9 @@ end
     @test_throws LoadError @eval @compat public @bar foo
     @test_throws LoadError @eval @compat publac @bar, foo
 end
+
+# https://github.com/JuliaLang/julia/pull/45052
+@testset "VersionNumber no-op constructor" begin
+    v = VersionNumber("1.2.3")
+    @test VersionNumber(v) === v
+end