Build failed [Solved?] - Githubissues

Using macOS 10.15.4, I got a "build failed" error message. Not being a Rust guy, I don't know what to look at next. What other information could I provide? Thanks.
bash-3.2$ cargo install wireguard-vanity-address
    Updating registry `https://github.com/rust-lang/crates.io-index`
  Installing wireguard-vanity-address v0.4.0
   Compiling subtle v2.1.1
   Compiling scopeguard v1.0.0
   Compiling libc v0.2.62
   Compiling strsim v0.8.0
   Compiling memoffset v0.5.1
   Compiling unicode-width v0.1.6
   Compiling nodrop v0.1.13
   Compiling rand_core v0.4.2
error: expected identifier, found keyword `type`
  --> /Users/richb/.cargo/registry/src/github.com-1ecc6299db9ec823/memoffset-0.5.1/src/offset_of.rs:41:20
   |
41 |     ($name:ident, $type:tt) => {
   |                    ^^^^

error: expected identifier, found keyword `type`
  --> /Users/richb/.cargo/registry/src/github.com-1ecc6299db9ec823/memoffset-0.5.1/src/offset_of.rs:44:48
   |
44 |         let non_null = $crate::ptr::NonNull::<$type>::dangling();
   |                                                ^^^^

error: expected identifier, found keyword `type`
  --> /Users/richb/.cargo/registry/src/github.com-1ecc6299db9ec823/memoffset-0.5.1/src/offset_of.rs:45:50
   |
45 |         let $name = non_null.as_ptr() as *const $type;
   |                                                  ^^^^

error: expected identifier, found keyword `type`
  --> /Users/richb/.cargo/registry/src/github.com-1ecc6299db9ec823/memoffset-0.5.1/src/offset_of.rs:53:7
   |
53 |     ($type:tt, $field:tt) => {
   |       ^^^^

error: expected identifier, found keyword `type`
  --> /Users/richb/.cargo/registry/src/github.com-1ecc6299db9ec823/memoffset-0.5.1/src/offset_of.rs:57:14
   |
57 |         let $type { $field: _, .. };
   |              ^^^^

error[E0432]: unresolved import `std::mem::ManuallyDrop`
   --> /Users/richb/.cargo/registry/src/github.com-1ecc6299db9ec823/scopeguard-1.0.0/src/lib.rs:196:22
    |
196 | use std::mem::{self, ManuallyDrop};
    |                      ^^^^^^^^^^^^ no `ManuallyDrop` in `mem`

error: aborting due to 5 previous errors

error: Could not compile `memoffset`.
Build failed, waiting for other jobs to finish...
error: the type of this value must be known in this context
   --> /Users/richb/.cargo/registry/src/github.com-1ecc6299db9ec823/scopeguard-1.0.0/src/lib.rs:459:13
    |
459 |             dropfn(value);
    |             ^^^^^^^^^^^^^

error: aborting due to previous error

error: Could not compile `scopeguard`.
Build failed, waiting for other jobs to finish...
error: struct field shorthands are unstable (see issue #37340)
   --> /Users/richb/.cargo/registry/src/github.com-1ecc6299db9ec823/rand_core-0.4.2/src/error.rs:102:21
    |
102 |             Error { kind, msg, cause: None }
    |                     ^^^^

error: struct field shorthands are unstable (see issue #37340)
   --> /Users/richb/.cargo/registry/src/github.com-1ecc6299db9ec823/rand_core-0.4.2/src/error.rs:102:27
    |
102 |             Error { kind, msg, cause: None }
    |                           ^^^

error: struct field shorthands are unstable (see issue #37340)
   --> /Users/richb/.cargo/registry/src/github.com-1ecc6299db9ec823/rand_core-0.4.2/src/error.rs:122:17
    |
122 |         Error { kind, msg, cause: Some(cause.into()) }
    |                 ^^^^

error: struct field shorthands are unstable (see issue #37340)
   --> /Users/richb/.cargo/registry/src/github.com-1ecc6299db9ec823/rand_core-0.4.2/src/error.rs:122:23
    |
122 |         Error { kind, msg, cause: Some(cause.into()) }
    |                       ^^^

error: struct field shorthands are unstable (see issue #37340)
   --> /Users/richb/.cargo/registry/src/github.com-1ecc6299db9ec823/rand_core-0.4.2/src/block.rs:138:13
    |
138 |             core,
    |             ^^^^

error: struct field shorthands are unstable (see issue #37340)
   --> /Users/richb/.cargo/registry/src/github.com-1ecc6299db9ec823/rand_core-0.4.2/src/block.rs:311:13
    |
311 |             core,
    |             ^^^^

error: aborting due to 6 previous errors

error: Could not compile `rand_core`.
Build failed, waiting for other jobs to finish...
error: no method named `max` found for type `usize` in the current scope
   --> /Users/richb/.cargo/registry/src/github.com-1ecc6299db9ec823/strsim-0.8.0/src/lib.rs:190:59
    |
190 |     1.0 - (levenshtein(a, b) as f64) / (a.chars().count().max(b.chars().count()) as f64)
    |                                                           ^^^
    |
    = note: the method `max` exists but the following trait bounds were not satisfied: `usize : std::iter::Iterator`

error: no method named `max` found for type `usize` in the current scope
   --> /Users/richb/.cargo/registry/src/github.com-1ecc6299db9ec823/strsim-0.8.0/src/lib.rs:333:67
    |
333 |     1.0 - (damerau_levenshtein(a, b) as f64) / (a.chars().count().max(b.chars().count()) as f64)
    |                                                                   ^^^
    |
    = note: the method `max` exists but the following trait bounds were not satisfied: `usize : std::iter::Iterator`

error: aborting due to 2 previous errors

error: Could not compile `strsim`.
Build failed, waiting for other jobs to finish...
error: failed to compile `wireguard-vanity-address v0.4.0`, intermediate artifacts can be found at `/var/folders/t7/txh6j62h8xjfkd0059b7m_k00000gn/T/cargo-install.mrOexw7s7REN`

Caused by:
  build failed
bash-3.2$
warner / wireguard-vanity-address

Build failed [Solved?] #21
