False positive error when try to download crate and .cargo-ok for it already exist

[Mingun]

I tried to reproduce tafia/quick-xml#562 report. During that I did the following:

1. install necessary tools

   cargo install cargo-minimal-versions
   cargo install cargo-hack

2. prepare working copy on tafia/quick-xml@779de32
3. apply patch:

    Cargo.toml | 8 ++++----
    1 file changed, 4 insertions(+), 4 deletions(-)
   
   diff --git a/Cargo.toml b/Cargo.toml
   index 212fc6a7..be89cd95 100644
   --- a/Cargo.toml
   +++ b/Cargo.toml
   @@ -17,7 +17,7 @@ include = ["src/*", "LICENSE-MIT.md", "README.md"]
    document-features = { version = "0.2", optional = true }
    encoding_rs = { version = "0.8", optional = true }
    serde = { version = "1.0.100", optional = true }
   -tokio = { version = "1.0", optional = true, default-features = false, features = ["io-util"] }
   +# tokio = { version = "1.0", optional = true, default-features = false, features = ["io-util"] }
    memchr = "2.0"
    arbitrary = { version = "1.2.3", features = ["derive"], optional = true }
   
   @@ -27,8 +27,8 @@ pretty_assertions = "1.3"
    regex = "1"
    serde = { version = "1.0", features = ["derive"] }
    serde-value = "0.7"
   -tokio = { version = "1.21", default-features = false, features = ["macros", "rt"] }
   -tokio-test = "0.4"
   +# tokio = { version = "1.21", default-features = false, features = ["macros", "rt"] }
   +# tokio-test = "0.4"
   
    [lib]
    bench = false
   @@ -50,7 +50,7 @@ default = []
    ## [reading events] from types implementing [`tokio::io::AsyncBufRead`].
    ##
    ## [reading events]: crate::reader::Reader::read_event_into_async
   -async-tokio = ["tokio"]
   +# async-tokio = ["tokio"]
   
    ## Enables support of non-UTF-8 encoded documents. Encoding will be inferred from
    ## the XML declaration if it will be found, otherwise UTF-8 is assumed.

4. run cargo minimal-versions check

   PS D:\Projects\quick-xml> cargo minimal-versions check
   info: running `cargo update -Z minimal-versions`
       Updating crates.io index
       Removing aho-corasick v0.7.20
       Removing anes v0.1.6
       Removing atty v0.2.14
       Removing autocfg v1.1.0
       Removing bitflags v1.3.2
       Removing bumpalo v3.11.1
       Removing cast v0.3.0
       Updating cfg-if v1.0.0 -> v0.1.0
       Removing ciborium v0.2.0
       Removing ciborium-io v0.2.0
       Removing ciborium-ll v0.2.0
       Removing clap v3.2.23
       Removing clap_lex v0.2.4
       Removing criterion v0.4.0
       Removing criterion-plot v0.5.0
       Removing crossbeam-channel v0.5.6
       Removing crossbeam-deque v0.8.2
       Removing crossbeam-epoch v0.9.13
       Removing crossbeam-utils v0.8.14
       Removing ctor v0.1.26
       Removing diff v0.1.13
       Updating document-features v0.2.7 -> v0.2.0
       Removing either v1.8.0
       Updating encoding_rs v0.8.31 -> v0.8.0
       Removing half v1.8.2
       Removing hashbrown v0.12.3
       Removing hermit-abi v0.1.19
       Removing hermit-abi v0.2.6
       Removing indexmap v1.9.2
       Removing itertools v0.10.5
       Removing itoa v1.0.5
       Removing js-sys v0.3.60
       Removing lazy_static v1.4.0
       Updating libc v0.2.138 -> v0.2.18
       Removing litrs v0.2.3
       Removing log v0.4.17
       Updating memchr v2.5.0 -> v2.0.0
       Removing memoffset v0.7.1
       Removing num-traits v0.2.15
       Removing num_cpus v1.15.0
       Removing once_cell v1.16.0
       Removing oorandom v11.1.3
       Removing ordered-float v2.10.0
       Removing os_str_bytes v6.4.1
       Removing output_vt100 v0.1.3
       Removing plotters v0.3.4
       Removing plotters-backend v0.3.4
       Removing plotters-svg v0.3.3
       Removing pretty_assertions v1.3.0
       Updating proc-macro2 v1.0.49 -> v1.0.0
       Removing quote v1.0.23
         Adding quote v0.3.8
         Adding quote v1.0.0
       Removing rayon v1.6.1
       Removing rayon-core v1.10.1
       Removing regex v1.7.0
       Removing regex-syntax v0.6.28
       Removing ryu v1.0.12
       Removing same-file v1.0.6
       Removing scopeguard v1.1.0
       Updating serde v1.0.151 -> v1.0.100
       Removing serde-value v0.7.0
       Updating serde_derive v1.0.151 -> v1.0.0
         Adding serde_derive_internals v0.15.0
       Removing serde_json v1.0.91
       Removing syn v1.0.107
         Adding syn v0.11.10
         Adding syn v1.0.0
         Adding synom v0.11.0
       Removing textwrap v0.16.0
       Removing tinytemplate v1.2.1
       Removing unicode-ident v1.0.6
         Adding unicode-xid v0.0.4
         Adding unicode-xid v0.2.0
       Removing walkdir v2.3.2
       Removing wasm-bindgen v0.2.83
       Removing wasm-bindgen-backend v0.2.83
       Removing wasm-bindgen-macro v0.2.83
       Removing wasm-bindgen-macro-support v0.2.83
       Removing wasm-bindgen-shared v0.2.83
       Removing web-sys v0.3.60
       Removing winapi v0.3.9
       Removing winapi-i686-pc-windows-gnu v0.4.0
       Removing winapi-util v0.1.5
       Removing winapi-x86_64-pc-windows-gnu v0.4.0
       Removing yansi v0.5.1
   info: running `cargo hack check`
   error: process didn't exit successfully: `\\?\D:\Users\mingun\.rustup\toolchains\nightly-x86_64-pc-windows-gnu\bin\cargo.exe metadata --format-version=1` (exit code: 101)
   --- stderr
   error: failed to download `libc v0.2.18`
   
   Caused by:
     unable to get packages from source
   
   Caused by:
     failed to unpack package `libc v0.2.18`
   
   Caused by:
     failed to open `D:\Users\mingun\.cargo\registry\src\github.com-1ecc6299db9ec823\libc-0.2.18\.cargo-ok`
   
   Caused by:
     Файл существует. (os error 80)
   
   error: process didn't exit successfully: `\\?\D:\Users\mingun\.rustup\toolchains\nightly-x86_64-pc-windows-gnu\bin\cargo.exe hack check` (exit code: 1)
   PS D:\Projects\quick-xml>

As you see, the process is failed due to existing file during attempt to download a crate. When I removed the mentioned file and repeat command, the check was performed successfully.

> cargo hack --version
cargo-hack 0.5.27

[Mingun]

Probably this is cargo issue

[taiki-e]

This is a cargo bug and occurs independently of cargo-hack (e.g., crossbeam-rs/crossbeam#962).