[INFO] fetching crate refptr 0.2.0...
[INFO] checking refptr-0.2.0 against master#f5f33ec0e0455eefa72fc5567eb1280a4d5ee206 for pr-83312
[INFO] extracting crate refptr 0.2.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate refptr 0.2.0 on toolchain f5f33ec0e0455eefa72fc5567eb1280a4d5ee206
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate refptr 0.2.0
[INFO] finished tweaking crates.io crate refptr 0.2.0
[INFO] tweaked toml for crates.io crate refptr 0.2.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "fetch" "--locked" "--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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] bab7907bf50236a564d678c7b99e30c2ebdef6ef4cc06a5dbcd54d670a9a8f90
[INFO] running `Command { std: "docker" "start" "-a" "bab7907bf50236a564d678c7b99e30c2ebdef6ef4cc06a5dbcd54d670a9a8f90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bab7907bf50236a564d678c7b99e30c2ebdef6ef4cc06a5dbcd54d670a9a8f90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bab7907bf50236a564d678c7b99e30c2ebdef6ef4cc06a5dbcd54d670a9a8f90", kill_on_drop: false }`
[INFO] [stdout] bab7907bf50236a564d678c7b99e30c2ebdef6ef4cc06a5dbcd54d670a9a8f90
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 26f90e468796426c6d497bfc3cd384d6c35f50f694ecced6725d20709cf7c755
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "26f90e468796426c6d497bfc3cd384d6c35f50f694ecced6725d20709cf7c755", kill_on_drop: false }`
[INFO] [stderr]    Compiling refptr-macros v0.2.0
[INFO] [stderr]     Checking refptr v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `aaa`
[INFO] [stdout]  --> tests/testy.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     aaa: i32,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `bbb`
[INFO] [stdout]  --> tests/testy.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     bbb: u32,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `aaa`
[INFO] [stdout]   --> tests/testy.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     aaa: i32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `bbb`
[INFO] [stdout]   --> tests/testy.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     bbb: u32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `aaa`
[INFO] [stdout]   --> tests/testy.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     aaa: i32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `bbb`
[INFO] [stdout]   --> tests/testy.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     bbb: u32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `aaa`
[INFO] [stdout]   --> tests/testy.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     aaa: i32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `bbb`
[INFO] [stdout]   --> tests/testy.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     bbb: u32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.57s
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "26f90e468796426c6d497bfc3cd384d6c35f50f694ecced6725d20709cf7c755", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26f90e468796426c6d497bfc3cd384d6c35f50f694ecced6725d20709cf7c755", kill_on_drop: false }`
[INFO] [stdout] 26f90e468796426c6d497bfc3cd384d6c35f50f694ecced6725d20709cf7c755