mikros/rust
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

README: Suggest using a previous nightly, revert other approach

Browse Source
This commit is contained in:
Timo 2019-03-31 10:03:03 -04:00 committed by GitHub
parent d5cdba5ee6
commit 67e123502c
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 11 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
README.md
View File

@ -53,6 +53,16 @@ Install Miri via `rustup`:
rustup component add miri
```
### error: component 'miri' is unavailable for download (nightly)
The development of rustc's internals is quite fast paced. Downstream projects that rely on nightly internals, particularly clippy, can break fairly often because of this.
When such breakages occur the nightly release will be missing Miri. This is a trade-off compared with the other option of just not publishing the night's release, but does avoid blocking the rust nightly releases for people that don't need clippy/Miri.
To mitigate the issues we have:
* rustup will warn if the update is missing any components you currently have. This means you can no longer accidentally update to a no-Miri release. Once Miri is available again it'll update.
* However, if you need latest nightly Miri you can use <https://rust-lang.github.io/rustup-components-history/> to find and install a dated nightly release e.g. `rustup install nightly-2018-12-06`.
Now you can run your project in Miri:
1. Run `cargo clean` to eliminate any cached dependencies. Miri needs your
@ -88,19 +98,9 @@ fn does_not_work_on_miri() {
### Common Problems
When using the above instructions, you may encounter a number of confusing
When using the above instructions, you may encounter a number of confusing compiler
errors.
#### "component 'miri' for target '\<target\>' is unavailable for download for channel 'nightly'"
The latest nightly may have broken Miri. If [this is the case][rust-toolstate], instead try to install Miri the old way with
```sh
cargo +nightly install --force --git https://github.com/rust-lang/miri miri
```
[rust-toolstate]:
#### "found possibly newer version of crate `std` which `<dependency>` depends on"
Your build directory may contain artifacts from an earlier build that have/have