[INFO] cloning repository https://github.com/767829413/rust_synchronous
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/767829413/rust_synchronous" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F767829413%2Frust_synchronous", kill_on_drop: false }`
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[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ef1d9c30431e83b0d3025d50b6f44887b8fefe2e
[INFO] checking 767829413/rust_synchronous against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F767829413%2Frust_synchronous" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/767829413/rust_synchronous on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/767829413/rust_synchronous
[INFO] finished tweaking git repo https://github.com/767829413/rust_synchronous
[INFO] tweaked toml for git repo https://github.com/767829413/rust_synchronous written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/767829413/rust_synchronous already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stdout] warning: the item `affinity` is imported redundantly
[INFO] [stdout]  --> src/base/my_thread.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use affinity;
[INFO] [stdout]   |     ^^^^^^^^ the item `affinity` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `beef` is imported redundantly
[INFO] [stdout]  --> src/concurrency/my_cow.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use beef;
[INFO] [stdout]   |     ^^^^ the item `beef` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Ok` is imported redundantly
[INFO] [stdout]  --> src/mping/ping.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::result::Result::Ok;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Ok` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `affinity` is imported redundantly
[INFO] [stdout]  --> src/base/my_thread.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use affinity;
[INFO] [stdout]   |     ^^^^^^^^ the item `affinity` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `beef` is imported redundantly
[INFO] [stdout]  --> src/concurrency/my_cow.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use beef;
[INFO] [stdout]   |     ^^^^ the item `beef` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Ok` is imported redundantly
[INFO] [stdout]  --> src/mping/ping.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::result::Result::Ok;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Ok` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]   --> src/concurrency/my_box.rs:24:17
[INFO] [stdout]    |
[INFO] [stdout] 24 |         Cons(T, Box<List<T>>),
[INFO] [stdout]    |         ----    ^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 24 |         Cons(T, ()),
[INFO] [stdout]    |                 ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]   --> src/concurrency/my_box.rs:24:17
[INFO] [stdout]    |
[INFO] [stdout] 24 |         Cons(T, Box<List<T>>),
[INFO] [stdout]    |         ----    ^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 24 |         Cons(T, ()),
[INFO] [stdout]    |                 ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 31.86s
[INFO] running `Command { std: "docker" "inspect" "d8566bb97a45983a99f2bbbaad59443e8986e7780c6e7f26df6b0553f16f523b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8566bb97a45983a99f2bbbaad59443e8986e7780c6e7f26df6b0553f16f523b", kill_on_drop: false }`
[INFO] [stdout] d8566bb97a45983a99f2bbbaad59443e8986e7780c6e7f26df6b0553f16f523b