Fails to install on Ubtuntu 18.04

[flanglet]

rustc --version
rustc 1.38.0-nightly (c798dffac 2019-07-27)

cargo install --path tokei
[...]

Compiling toml v0.5.6
error[E0658]: use of unstable library feature 'map_get_key_value'
--> /home/fred/.cargo/registry/src/github.1485827954.workers.dev-1ecc6299db9ec823/dashmap-3.7.0/src/lib.rs:609:37
|
609 | if let Some((k, v)) = shard.get_key_value(key) {
| ^^^^^^^^^^^^^
|
= note: for more information, see rust-lang/rust#49347
= help: add #![feature(map_get_key_value)] to the crate attributes to enable

error[E0658]: use of unstable library feature 'map_get_key_value'
--> /home/fred/.cargo/registry/src/github.1485827954.workers.dev-1ecc6299db9ec823/dashmap-3.7.0/src/lib.rs:639:43
|
639 | if let Some((kptr, vptr)) = shard.get_key_value(key) {
| ^^^^^^^^^^^^^
|
= note: for more information, see rust-lang/rust#49347
= help: add #![feature(map_get_key_value)] to the crate attributes to enable

error[E0658]: use of unstable library feature 'map_get_key_value'
--> /home/fred/.cargo/registry/src/github.1485827954.workers.dev-1ecc6299db9ec823/dashmap-3.7.0/src/lib.rs:659:43
|
659 | if let Some((kptr, vptr)) = shard.get_key_value(key) {
| ^^^^^^^^^^^^^
|
= note: for more information, see rust-lang/rust#49347
= help: add #![feature(map_get_key_value)] to the crate attributes to enable

error[E0658]: use of unstable library feature 'map_get_key_value'
--> /home/fred/.cargo/registry/src/github.1485827954.workers.dev-1ecc6299db9ec823/dashmap-3.7.0/src/lib.rs:717:43
|
717 | if let Some((kptr, vptr)) = shard.get_key_value(&key) {
| ^^^^^^^^^^^^^
|
= note: for more information, see rust-lang/rust#49347
= help: add #![feature(map_get_key_value)] to the crate attributes to enable

Compiling serde_json v1.0.48
error[E0658]: use of unstable library feature 'map_get_key_value'
--> /home/fred/.cargo/registry/src/github.1485827954.workers.dev-1ecc6299db9ec823/dashmap-3.7.0/src/mapref/entry.rs:106:37
|
106 | let (k, v) = self.shard.get_key_value(&c).unwrap();
| ^^^^^^^^^^^^^
|
= note: for more information, see rust-lang/rust#49347
= help: add #![feature(map_get_key_value)] to the crate attributes to enable

error: aborting due to 5 previous errors

For more information about this error, try rustc --explain E0658.
error: Could not compile dashmap.
warning: build failed, waiting for other jobs to finish...
error: failed to compile tokei v11.0.0 (/mnt/ddd4dfd5-591c-4868-b1f3-f2c8b0ab4ba6/ws/tokei), intermediate artifacts can be found at /mnt/ddd4dfd5-591c-4868-b1f3-f2c8b0ab4ba6/ws/tokei/target

[XAMPPRocky]

@flanglet Thank you for your issue! Tokei only supports the latest stable Rust compiler (1.42.0), you need to update your rust version. You can do with rustup update, and then it should work.

[xmo-odoo]

@XAMPPRocky 18.04 has rustc 1.39 in apt so probably the source of the issue, it's possible to apt install cargo but then tokei fails to compile.