rust-lang / rust-lang/rust-bindgen

Bindgen trying to derive default for types that can't be.

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Rust
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Description

pub __bindgen_padding_0: [u8; 40usize],
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait Default is not implemented for [u8; 40]

This very well may be something I (should) have to work around, but could you please explain the meaning of "when possible" in the doc?

Image

$ rustup show
Default host: x86_64-pc-windows-msvc
rustup home:  C:\Users\ddumont\.rustup

installed toolchains
--------------------

stable-x86_64-pc-windows-msvc (default)
1.86.0-x86_64-pc-windows-msvc

active toolchain
----------------

stable-x86_64-pc-windows-msvc (default)
rustc 1.85.0 (4d91de4e4 2025-02-17)

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Research direction

The issue names no source file or test. Start by locating the documentation passage containing “when possible” and reproduce the generated binding with the reported Rust 1.85 Windows toolchain; done means determining whether Default should be derived for the padding array and clarifying or correcting that documented behavior.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
devtools
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
30/100

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