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release-1.12: note that --trim is experimental and other news/history file fixes #58570

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May 30, 2025
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release-1.12: note that --trim is experimental and other news/history file fixes #58570

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2 changes: 1 addition & 1 deletion HISTORY.md
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Julia v1.11 Release Notes
========================
=========================

New language features
---------------------
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13 changes: 8 additions & 5 deletions NEWS.md
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Julia v1.12 Release Notes
========================
=========================

New language features
---------------------

* New option `--trim` creates smaller binaries by removing code that was not proven to be reachable from
entry points. Entry points can be marked using `Base.Experimental.entrypoint` ([#55047]).
* Redefinition of constants is now well defined and follows world age semantics. Additional redefinitions (e.g. of structs) are now allowed. See [the new manual chapter on world age](https://docs.julialang.org/en/v1.13-dev/manual/worldage/).
* New experimental option `--trim` that creates smaller binaries by removing code not proven to be reachable from
entry points. Entry points can be marked using `Base.Experimental.entrypoint` ([#55047]). Not all
code is expected to work with this option, and since it is experimental you may encounter problems.
* Redefinition of constants is now well defined and follows world age semantics ([#57253]). Additional redefinitions
(e.g. of types) are now allowed. See [the new manual chapter on world age](https://docs.julialang.org/en/v1.13-dev/manual/worldage/).
* A new keyword argument `usings::Bool` has been added to `names`, returning all names visible
via `using` ([#54609]).
* The `@atomic` macro family now supports reference assignment syntax, e.g. `@atomic :monotonic v[3] += 4`,
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* Calling `using` on a package name inside of that package of that name (especially relevant
for a submodule) now explicitly uses that package without examining the Manifest and
environment, which is identical to the behavior of `..Name`. This appears to better match
how users expect this to behave in the wild. ([#57727])
how users expect this to behave in the wild ([#57727]).


Compiler/Runtime improvements
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[#57081]: https://github.com/JuliaLang/julia/issues/57081
[#57087]: https://github.com/JuliaLang/julia/issues/57087
[#57109]: https://github.com/JuliaLang/julia/issues/57109
[#57253]: https://github.com/JuliaLang/julia/issues/57253