[INFO] fetching crate wsmirror 0.1.0...
[INFO] building wsmirror-0.1.0 against master#ad85bc524b1ad696e42061ad8338d382dffbdbe5 for pr-146237-1
[INFO] extracting crate wsmirror 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate wsmirror 0.1.0
[INFO] finished tweaking crates.io crate wsmirror 0.1.0
[INFO] tweaked toml for crates.io crate wsmirror 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate wsmirror 0.1.0 on toolchain ad85bc524b1ad696e42061ad8338d382dffbdbe5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate wsmirror 0.1.0 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" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cpufeatures v0.2.1
[INFO] [stderr]   Downloaded tinyvec v1.4.0
[INFO] [stderr]   Downloaded futures-macro v0.3.17
[INFO] [stderr]   Downloaded tokio-tungstenite v0.15.0
[INFO] [stderr]   Downloaded thiserror-impl v1.0.29
[INFO] [stderr]   Downloaded futures-executor v0.3.17
[INFO] [stderr]   Downloaded anyhow v1.0.44
[INFO] [stderr]   Downloaded futures v0.3.17
[INFO] [stderr]   Downloaded tungstenite v0.14.0
[INFO] [stderr]   Downloaded futures-io v0.3.17
[INFO] [stderr]   Downloaded thiserror v1.0.29
[INFO] [stderr]   Downloaded syn v1.0.77
[INFO] [stderr]   Downloaded libc v0.2.102
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e661f429cee4483bb297419b81a019b3cb50648a6c3d6e0e0d03c1f42857a144
[INFO] running `Command { std: "docker" "start" "-a" "e661f429cee4483bb297419b81a019b3cb50648a6c3d6e0e0d03c1f42857a144", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e661f429cee4483bb297419b81a019b3cb50648a6c3d6e0e0d03c1f42857a144", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e661f429cee4483bb297419b81a019b3cb50648a6c3d6e0e0d03c1f42857a144", kill_on_drop: false }`
[INFO] [stdout] e661f429cee4483bb297419b81a019b3cb50648a6c3d6e0e0d03c1f42857a144
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cf97257b6ffd20e4c84f7518f656f46139ddbf488cbe54e713466750555c7c6c
[INFO] running `Command { std: "docker" "start" "-a" "cf97257b6ffd20e4c84f7518f656f46139ddbf488cbe54e713466750555c7c6c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.77
[INFO] [stderr]    Compiling libc v0.2.102
[INFO] [stderr]    Compiling typenum v1.14.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling futures-core v0.3.17
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]    Compiling tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling futures-channel v0.3.17
[INFO] [stderr]    Compiling futures-task v0.3.17
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling futures-macro v0.3.17
[INFO] [stderr]    Compiling futures-util v0.3.17
[INFO] [stderr]    Compiling futures-sink v0.3.17
[INFO] [stderr]    Compiling pin-project-lite v0.2.7
[INFO] [stderr]    Compiling tinyvec v1.4.0
[INFO] [stderr]    Compiling matches v0.1.9
[INFO] [stderr]    Compiling bytes v1.1.0
[INFO] [stderr]    Compiling unicode-bidi v0.3.6
[INFO] [stderr]    Compiling slab v0.4.4
[INFO] [stderr]    Compiling futures-io v0.3.17
[INFO] [stderr]    Compiling httparse v1.5.1
[INFO] [stderr]    Compiling form_urlencoded v1.0.1
[INFO] [stderr]    Compiling tokio v1.12.0
[INFO] [stderr]    Compiling cpufeatures v0.2.1
[INFO] [stderr]    Compiling opaque-debug v0.3.0
[INFO] [stderr]    Compiling anyhow v1.0.44
[INFO] [stderr]    Compiling base64 v0.13.0
[INFO] [stderr]    Compiling http v0.2.5
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling mio v0.7.13
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling unicode-normalization v0.1.19
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling block-buffer v0.9.0
[INFO] [stderr]    Compiling digest v0.9.0
[INFO] [stderr]    Compiling sha-1 v0.9.8
[INFO] [stderr]    Compiling idna v0.2.3
[INFO] [stderr]    Compiling url v2.2.2
[INFO] [stderr]    Compiling thiserror-impl v1.0.29
[INFO] [stderr]    Compiling pin-project-internal v1.0.8
[INFO] [stderr]    Compiling tokio-macros v1.3.0
[INFO] [stderr]    Compiling thiserror v1.0.29
[INFO] [stderr]    Compiling tungstenite v0.14.0
[INFO] [stderr]    Compiling pin-project v1.0.8
[INFO] [stderr]    Compiling futures-executor v0.3.17
[INFO] [stderr]    Compiling tokio-tungstenite v0.15.0
[INFO] [stderr]    Compiling futures v0.3.17
[INFO] [stderr]    Compiling wsmirror v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused output of future returned by `tokio::task::yield_now` that must be used
[INFO] [stdout]   --> src/main.rs:53:29
[INFO] [stdout]    |
[INFO] [stdout] 53 | ...                   tokio::task::yield_now().await;
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: yield_now does nothing unless polled/`await`-ed
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 53 |                             let _ = tokio::task::yield_now().await;
[INFO] [stdout]    |                             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 18.55s
[INFO] running `Command { std: "docker" "inspect" "cf97257b6ffd20e4c84f7518f656f46139ddbf488cbe54e713466750555c7c6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf97257b6ffd20e4c84f7518f656f46139ddbf488cbe54e713466750555c7c6c", kill_on_drop: false }`
[INFO] [stdout] cf97257b6ffd20e4c84f7518f656f46139ddbf488cbe54e713466750555c7c6c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8fb7e822db382842b5e42e025d2514c147829e3952967a25bf7f16cc6a348e13
[INFO] running `Command { std: "docker" "start" "-a" "8fb7e822db382842b5e42e025d2514c147829e3952967a25bf7f16cc6a348e13", kill_on_drop: false }`
[INFO] [stderr]    Compiling wsmirror v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused output of future returned by `tokio::task::yield_now` that must be used
[INFO] [stdout]   --> src/main.rs:53:29
[INFO] [stdout]    |
[INFO] [stdout] 53 | ...                   tokio::task::yield_now().await;
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: yield_now does nothing unless polled/`await`-ed
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 53 |                             let _ = tokio::task::yield_now().await;
[INFO] [stdout]    |                             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "8fb7e822db382842b5e42e025d2514c147829e3952967a25bf7f16cc6a348e13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fb7e822db382842b5e42e025d2514c147829e3952967a25bf7f16cc6a348e13", kill_on_drop: false }`
[INFO] [stdout] 8fb7e822db382842b5e42e025d2514c147829e3952967a25bf7f16cc6a348e13