Julia v1.13 Release Notes

New language features

New Base.@acquire macro for a non-closure version of Base.acquire(f, s::Base.Semaphore), like @lock. ([#56845])

Language changes

Compiler/Runtime improvements

Command-line option changes

Multi-threading changes

Build system changes

New library functions

New library features

sort(keys(::Dict)) and sort(values(::Dict)) now automatically collect, they previously threw ([#56978]).
Base.AbstractOneTo is added as a supertype of one-based axes, with Base.OneTo as its subtype ([#56902]).

Standard library changes

JuliaSyntaxHighlighting

LinearAlgebra

Profile

REPL

Test

Test failures when using the @test macro now show evaluated arguments for all function calls ([#57825], [#57839]).

InteractiveUtils

Introspection utilities such as @code_typed, @which and @edit now accept type annotations as substitutes for values, recognizing forms such as f(1, ::Float64, 3) or even sum(::Vector{T}; init = ::T) where {T<:Real} ([#57909]).

External dependencies

Tooling Improvements