[INFO] fetching crate completable_future 0.1.0...
[INFO] checking completable_future-0.1.0 against try#c659ee110de67e82444e4b6c8407c1a9af9c2cf6 for pr-145608-1
[INFO] extracting crate completable_future 0.1.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate completable_future 0.1.0
[INFO] finished tweaking crates.io crate completable_future 0.1.0
[INFO] tweaked toml for crates.io crate completable_future 0.1.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate completable_future 0.1.0 on toolchain c659ee110de67e82444e4b6c8407c1a9af9c2cf6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 56 packages to latest compatible versions
[INFO] [stderr]       Adding futures v0.1.31 (available: v0.3.31)
[INFO] [stderr]       Adding tokio v0.1.22 (available: v1.47.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 28748b6f0e5ee1b3adb5c5f41a8fc0577999f719a09980ff87d4a62794c1cf6a
[INFO] running `Command { std: "docker" "start" "-a" "28748b6f0e5ee1b3adb5c5f41a8fc0577999f719a09980ff87d4a62794c1cf6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "28748b6f0e5ee1b3adb5c5f41a8fc0577999f719a09980ff87d4a62794c1cf6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28748b6f0e5ee1b3adb5c5f41a8fc0577999f719a09980ff87d4a62794c1cf6a", kill_on_drop: false }`
[INFO] [stdout] 28748b6f0e5ee1b3adb5c5f41a8fc0577999f719a09980ff87d4a62794c1cf6a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 981ee5615bf55e62dce8d66de753135b62836a8362fc2833dbe79eb469530ab4
[INFO] running `Command { std: "docker" "start" "-a" "981ee5615bf55e62dce8d66de753135b62836a8362fc2833dbe79eb469530ab4", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking completable_future v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking tokio-threadpool v0.1.18
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/lib.rs:77:17
[INFO] [stdout]    |
[INFO] [stdout] 77 |                 mem::replace(self, WakerWrapper::Registered(waker));
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 77 |                 let _ = mem::replace(self, WakerWrapper::Registered(waker));
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]     Checking tokio-reactor v0.1.12
[INFO] [stderr]     Checking tokio-codec v0.1.2
[INFO] [stderr]     Checking tokio-fs v0.1.7
[INFO] [stderr]     Checking tokio-udp v0.1.6
[INFO] [stderr]     Checking tokio-uds v0.2.7
[INFO] [stderr]     Checking tokio-tcp v0.1.4
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/lib.rs:77:17
[INFO] [stdout]    |
[INFO] [stdout] 77 |                 mem::replace(self, WakerWrapper::Registered(waker));
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 77 |                 let _ = mem::replace(self, WakerWrapper::Registered(waker));
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> tests/tests.rs:75:7
[INFO] [stdout]    |
[INFO] [stdout] 75 |         let mut tm = mutate_counter.clone();
[INFO] [stdout]    |             ----^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> tests/tests.rs:97:7
[INFO] [stdout]    |
[INFO] [stdout] 97 |         let mut tm = mutate_counter.clone();
[INFO] [stdout]    |             ----^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.65s
[INFO] running `Command { std: "docker" "inspect" "981ee5615bf55e62dce8d66de753135b62836a8362fc2833dbe79eb469530ab4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "981ee5615bf55e62dce8d66de753135b62836a8362fc2833dbe79eb469530ab4", kill_on_drop: false }`
[INFO] [stdout] 981ee5615bf55e62dce8d66de753135b62836a8362fc2833dbe79eb469530ab4