navi: Error while trying to install from cargo

Describe the bug Error while trying to install from cargo or install script. Both give the same error.

To Reproduce Just run the required installation code.

Expected behavior To install it.

Screenshots

$ cargo install navi
    Updating crates.io index
  Installing navi v2.17.0
   Compiling libc v0.2.100
   Compiling cfg-if v1.0.0
   Compiling proc-macro2 v1.0.28
   Compiling unicode-xid v0.2.2
   Compiling syn v1.0.75
   Compiling version_check v0.9.3
   Compiling memchr v2.4.1
   Compiling log v0.4.14
   Compiling autocfg v1.0.1
   Compiling ppv-lite86 v0.2.10
   Compiling signal-hook v0.3.9
   Compiling serde_derive v1.0.128
   Compiling scopeguard v1.1.0
   Compiling serde v1.0.128
   Compiling smallvec v1.6.1
   Compiling unicode-segmentation v1.8.0
   Compiling hashbrown v0.11.2
   Compiling bitflags v1.3.2
   Compiling utf8parse v0.1.1
   Compiling regex-syntax v0.6.25
   Compiling lazy_static v1.4.0
   Compiling anyhow v1.0.43
   Compiling either v1.6.1
   Compiling linked-hash-map v0.5.4
   Compiling remove_dir_all v0.5.3
   Compiling unicode-width v0.1.8
   Compiling termcolor v1.1.2
   Compiling same-file v1.0.6
   Compiling dtoa v0.4.8
   Compiling os_str_bytes v3.1.0
   Compiling vec_map v0.8.2
   Compiling strsim v0.10.0
   Compiling instant v0.1.10
   Compiling lock_api v0.4.4
   Compiling proc-macro-error-attr v1.0.4
   Compiling proc-macro-error v1.0.4
   Compiling vte v0.3.3
   Compiling indexmap v1.7.0
   Compiling textwrap v0.14.2
   Compiling yaml-rust v0.4.5
   Compiling walkdir v2.3.2
   Compiling heck v0.3.3
   Compiling strip-ansi-escapes v0.1.0
   Compiling aho-corasick v0.7.18
   Compiling quote v1.0.9
   Compiling getrandom v0.2.3
   Compiling signal-hook-registry v1.4.0
   Compiling mio v0.7.13
   Compiling parking_lot_core v0.8.3
   Compiling atty v0.2.14
   Compiling which v4.2.2
   Compiling dirs-sys-next v0.1.2
   Compiling remove_dir_all v0.7.0
   Compiling rand_core v0.6.3
   Compiling parking_lot v0.11.1
   Compiling regex v1.5.4
   Compiling directories-next v2.0.0
   Compiling rand_chacha v0.3.1
   Compiling signal-hook-mio v0.2.1
   Compiling shellwords v1.1.0
   Compiling rand v0.8.4
   Compiling crossterm v0.20.0
   Compiling tempfile v3.2.0
   Compiling edit v0.1.3
   Compiling thiserror-impl v1.0.26
   Compiling clap_derive v3.0.0-beta.4
   Compiling thiserror v1.0.26
   Compiling clap v3.0.0-beta.4
error[E0658]: arbitrary expressions in key-value attributes are unstable
 --> /home/gca/.cargo/registry/src/github.com-1ecc6299db9ec823/clap-3.0.0-beta.4/src/lib.rs:8:10
  |
8 | #![doc = include_str!("../README.md")]
  |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: see issue #78835 <https://github.com/rust-lang/rust/issues/78835> for more information

error[E0658]: use of unstable library feature 'osstring_ascii'
   --> /home/gca/.cargo/registry/src/github.com-1ecc6299db9ec823/clap-3.0.0-beta.4/src/parse/matches/matched_arg.rs:130:19
    |
130 |                 v.eq_ignore_ascii_case(val)
    |                   ^^^^^^^^^^^^^^^^^^^^
    |
    = note: see issue #70516 <https://github.com/rust-lang/rust/issues/70516> for more information

error: aborting due to 2 previous errors

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

To learn more, run the command again with --verbose.
warning: build failed, waiting for other jobs to finish...
error: failed to compile `navi v2.17.0`, intermediate artifacts can be found at `/tmp/cargo-installph3cZ6`

Caused by:
  build failed

Versions:

• OS: Ubuntu 21.04
• Shell Version: GNU bash, version 5.1.4(1)-release (x86_64-pc-linux-gnu)
• Cargo Version: 1.51.0

Additional context Installed cargo via apt-get. Successfully installed other stuff via cargo.