ararslan opened a new pull request, #543:
URL: https://github.com/apache/arrow-julia/pull/543
The internal Flatbuf module defines a function called `Type`. On Julia 1.12,
defining a new function by defining methods is insufficient to distinguish it
from defining new constructor methods for a visible type of the same name. It's
now necessary to forward-declare the function to ensure it takes precedence
over the other visible binding. Without doing so, `Base.Type` is extended in
Flatbuf instead.
On current `main` with Julia v1.13.0-DEV.122:
```julia-repl
julia> using Arrow
Info Given Arrow was explicitly requested, output will be shown live
WARNING: Constructor for type "Type" was extended in `Flatbuf` without
explicit qualification or import.
NOTE: Assumed "Type" refers to `Base.Type`. This behavior is deprecated
and may differ in future versions.
NOTE: This behavior may have differed in Julia versions prior to 1.12.
Hint: If you intended to create a new generic function of the same name,
use `function Type end`.
Hint: To silence the warning, qualify `Type` as `Base.Type` in the method
signature or explicitly `import Base: Type`.
Precompiling Arrow finished.
1 dependency successfully precompiled in 4 seconds. 47 already precompiled.
1 dependency had output during precompilation:
┌ Arrow
│ [Output was shown above]
└
julia> methods(Type)
# 2 methods for type constructor:
[1] Type(b::UInt8)
@ Arrow.Flatbuf
~/Projects/julia-packages/arrow-julia/src/metadata/Schema.jl:489
[2] Type(::Type{T}) where T
@ Arrow.Flatbuf
~/Projects/julia-packages/arrow-julia/src/metadata/Schema.jl:519
julia> Arrow.Flatbuf.Type === Type
[ Warning: Type is defined in Core and is not public in Arrow.Flatbuf
true
```
With this PR, the output is the same because of
https://github.com/JuliaLang/julia/issues/57546 but will have the correct
behavior once that issue is fixed.
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