货物错误：无法从源头获取包裹答案

【问题标题】：Cargo error: unable to get packages from source货物错误：无法从源头获取包裹
【发布时间】：2022-01-25 23:20:00
【问题描述】：

error: failed to download `adler v1.0.2`

Caused by:
  unable to get packages from source

Caused by:
  failed to parse manifest at `/home/actionanand/.cargo/registry/src/github.com-1ecc6299db9ec823/adler-1.0.2/Cargo.toml`

Caused by:
  could not parse input as TOML

Caused by:
  unexpected character found: `\u{0}` at line 1 column 1

我们添加新依赖时，Rust .toml 文件满是红线

【问题讨论】：

标签： rust webassembly rust-cargo

【解决方案1】：

这是由于内部包裹（比如货物）崩溃引起的

我们可以按照以下步骤解决这个问题

请清货registry

rm -rf /home/username/.cargo/registry/

如果您使用旧版本，请按照后面显示的步骤操作

作为参考，我在下面也给出了程序：

If you are trying to migrate from the previous edition (2018), the
process requires following these steps:

1. Start with `edition = "2018"` in `Cargo.toml`
2. Run `cargo fix --edition`
3. Modify `Cargo.toml` to set `edition = "2021"`
4. Run `cargo build` or `cargo test` to verify the fixes worked

More details may be found at
https://doc.rust-lang.org/edition-guide/editions/transitioning-an-existing-project-to-a-new-edition.html

您有时可能需要添加--allow-no-vcs（终端会提示）如下

cargo fix --edition --allow-no-vcs

【讨论】：