[INFO] fetching crate streamline 0.0.7...
[INFO] checking streamline-0.0.7 against try#0edd13c68435d50367c79cef43ac2768d2ec4f3d for pr-129422
[INFO] extracting crate streamline 0.0.7 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate streamline 0.0.7 on toolchain 0edd13c68435d50367c79cef43ac2768d2ec4f3d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0edd13c68435d50367c79cef43ac2768d2ec4f3d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate streamline 0.0.7
[INFO] finished tweaking crates.io crate streamline 0.0.7
[INFO] tweaked toml for crates.io crate streamline 0.0.7 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0edd13c68435d50367c79cef43ac2768d2ec4f3d" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 24 packages to latest compatible versions
[INFO] [stderr]       Adding bytes v0.5.6 (latest: v1.7.1)
[INFO] [stderr]       Adding pin-project-lite v0.1.12 (latest: v0.2.14)
[INFO] [stderr]       Adding tokio v0.2.25 (latest: v1.40.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0edd13c68435d50367c79cef43ac2768d2ec4f3d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+0edd13c68435d50367c79cef43ac2768d2ec4f3d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 02638d7656bd9c5557f58d2084b4fa8a2ebf0c87ec6c833b2f8c4ff0e5cf0fdb
[INFO] running `Command { std: "docker" "start" "-a" "02638d7656bd9c5557f58d2084b4fa8a2ebf0c87ec6c833b2f8c4ff0e5cf0fdb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "02638d7656bd9c5557f58d2084b4fa8a2ebf0c87ec6c833b2f8c4ff0e5cf0fdb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02638d7656bd9c5557f58d2084b4fa8a2ebf0c87ec6c833b2f8c4ff0e5cf0fdb", kill_on_drop: false }`
[INFO] [stdout] 02638d7656bd9c5557f58d2084b4fa8a2ebf0c87ec6c833b2f8c4ff0e5cf0fdb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+0edd13c68435d50367c79cef43ac2768d2ec4f3d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 99c8135b83cf48b36234af7e8038d9e9a4f3f53b4f13c066c0db2984de5d7d30
[INFO] running `Command { std: "docker" "start" "-a" "99c8135b83cf48b36234af7e8038d9e9a4f3f53b4f13c066c0db2984de5d7d30", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.3.0
[INFO] [stderr]     Checking futures-sink v0.3.30
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]     Checking futures-io v0.3.30
[INFO] [stderr]     Checking pin-project-lite v0.2.14
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]     Checking futures-task v0.3.30
[INFO] [stderr]     Checking pin-project-lite v0.1.12
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]     Checking lazy_static v1.5.0
[INFO] [stderr]    Compiling syn v2.0.77
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]     Checking tokio v0.2.25
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]    Compiling async-trait v0.1.81
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]     Checking streamline v0.0.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/streamline.rs:77:33
[INFO] [stdout]    |
[INFO] [stdout] 77 | / ...                   std::mem::replace(
[INFO] [stdout] 78 | | ...                       &mut state_machine.cancellation_handle,
[INFO] [stdout] 79 | | ...                       Some(reciever),
[INFO] [stdout] 80 | | ...                   );
[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 _ = std::mem::replace(
[INFO] [stdout]    |                                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/streamline.rs:77:33
[INFO] [stdout]    |
[INFO] [stdout] 77 | / ...                   std::mem::replace(
[INFO] [stdout] 78 | | ...                       &mut state_machine.cancellation_handle,
[INFO] [stdout] 79 | | ...                       Some(reciever),
[INFO] [stdout] 80 | | ...                   );
[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 _ = std::mem::replace(
[INFO] [stdout]    |                                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.98s
[INFO] running `Command { std: "docker" "inspect" "99c8135b83cf48b36234af7e8038d9e9a4f3f53b4f13c066c0db2984de5d7d30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99c8135b83cf48b36234af7e8038d9e9a4f3f53b4f13c066c0db2984de5d7d30", kill_on_drop: false }`
[INFO] [stdout] 99c8135b83cf48b36234af7e8038d9e9a4f3f53b4f13c066c0db2984de5d7d30