error[E0658]: use of unstable library feature 'str_strip': newly added

[bkzachariah]

• The exact dog commit you are building (git rev-parse --short HEAD)
• The version of rustc you are compiling it with (rustc --version) - rustc 1.43.0
• Your operating system and hardware platform - Ubuntu 20.04
• The Rust build target (the exact output of rustc --print cfg)

dog-0.1.0 Version

If you are seeing compilation errors, please include the output of the build process.

Compiling rand_core v0.5.1
Compiling dog v0.1.0 (/home/ubuntu/dog-0.1.0)
Compiling rand_chacha v0.2.2
Compiling rand v0.7.3
Compiling dns-transport v0.1.0 (/home/ubuntu/dog-0.1.0/dns-transport)
error[E0658]: use of unstable library feature 'str_strip': newly added
--> dns-transport/src/https.rs:109:36
|
109 | if let Some(sp) = self.url.strip_prefix("https://") {
| ^^^^^^^^^^^^
|
= note: see issue #67302 rust-lang/rust#67302 for more information

error: aborting due to previous error

For more information about this error, try rustc --explain E0658.
error: could not compile dns-transport.

To learn more, run the command again with --verbose.

---

[pschmitt]

I've been there as well, on KDE Neon. You need to update your Rust install.
Uninstall rustc and cargo, then get a fresh version using rustup.

[ogham]

That's correct — you need Rust v1.45.0 or higher, because dog uses features that were recently stabilised. rustup is indeed the best way to get this onto your system.