[INFO] fetching crate rcbytes 1.2.2...
[INFO] checking rcbytes-1.2.2 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] extracting crate rcbytes 1.2.2 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate rcbytes 1.2.2 on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rcbytes 1.2.2
[INFO] finished tweaking crates.io crate rcbytes 1.2.2
[INFO] tweaked toml for crates.io crate rcbytes 1.2.2 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 8 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 213f27b89f864691c3d0d81500d1848c2abe1c469545a9870c9f78bc4c106a5e
[INFO] running `Command { std: "docker" "start" "-a" "213f27b89f864691c3d0d81500d1848c2abe1c469545a9870c9f78bc4c106a5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "213f27b89f864691c3d0d81500d1848c2abe1c469545a9870c9f78bc4c106a5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "213f27b89f864691c3d0d81500d1848c2abe1c469545a9870c9f78bc4c106a5e", kill_on_drop: false }`
[INFO] [stdout] 213f27b89f864691c3d0d81500d1848c2abe1c469545a9870c9f78bc4c106a5e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c34e2280ece37031eb5780b616b2618202f0b82c747005e8606ae42f81763608
[INFO] running `Command { std: "docker" "start" "-a" "c34e2280ece37031eb5780b616b2618202f0b82c747005e8606ae42f81763608", kill_on_drop: false }`
[INFO] [stderr]     Checking serde_test v1.0.177
[INFO] [stderr]     Checking rcbytes v1.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary allocation, use `&mut` instead
[INFO] [stdout]    --> tests/test_buf_mut.rs:175:5
[INFO] [stdout]     |
[INFO] [stdout] 175 |     Box::new(Special).put_u8(b'x');
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_allocation)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary allocation, use `&mut` instead
[INFO] [stdout]    --> tests/test_buf.rs:127:16
[INFO] [stdout]     |
[INFO] [stdout] 127 |     assert_eq!(Box::new(Special).get_u8(), b'x');
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_allocation)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.43s
[INFO] running `Command { std: "docker" "inspect" "c34e2280ece37031eb5780b616b2618202f0b82c747005e8606ae42f81763608", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c34e2280ece37031eb5780b616b2618202f0b82c747005e8606ae42f81763608", kill_on_drop: false }`
[INFO] [stdout] c34e2280ece37031eb5780b616b2618202f0b82c747005e8606ae42f81763608