[INFO] fetching crate rcf 0.1.2...
[INFO] checking rcf-0.1.2 against master#22572d0994593197593e2a1b7b18d720a9a349a7 for pr-126452-1
[INFO] extracting crate rcf 0.1.2 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate rcf 0.1.2 on toolchain 22572d0994593197593e2a1b7b18d720a9a349a7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rcf 0.1.2
[INFO] finished tweaking crates.io crate rcf 0.1.2
[INFO] tweaked toml for crates.io crate rcf 0.1.2 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate rcf 0.1.2 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" "+22572d0994593197593e2a1b7b18d720a9a349a7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded crossbeam-queue v0.3.1
[INFO] [stderr]   Downloaded termion v1.5.5
[INFO] [stderr]   Downloaded crossbeam v0.8.0
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4daf6ba11af8612d248b0c30984a935eaa137c3034fd0d49d6b31750f0942a2e
[INFO] running `Command { std: "docker" "start" "-a" "4daf6ba11af8612d248b0c30984a935eaa137c3034fd0d49d6b31750f0942a2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4daf6ba11af8612d248b0c30984a935eaa137c3034fd0d49d6b31750f0942a2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4daf6ba11af8612d248b0c30984a935eaa137c3034fd0d49d6b31750f0942a2e", kill_on_drop: false }`
[INFO] [stdout] 4daf6ba11af8612d248b0c30984a935eaa137c3034fd0d49d6b31750f0942a2e
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] afb3d7c88adca1370360ba97dae020c440ccb1d6514c88dce802bf490dbeb53f
[INFO] running `Command { std: "docker" "start" "-a" "afb3d7c88adca1370360ba97dae020c440ccb1d6514c88dce802bf490dbeb53f", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.1
[INFO] [stderr]    Compiling memoffset v0.6.1
[INFO] [stderr]    Compiling const_fn v0.4.4
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking numtoa v0.1.0
[INFO] [stderr]     Checking itertools v0.10.0
[INFO] [stderr]     Checking fuzzy-matcher v0.3.7
[INFO] [stderr]     Checking crossbeam-queue v0.3.1
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]     Checking crossbeam-epoch v0.9.1
[INFO] [stderr]     Checking termion v1.5.5
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking crossbeam v0.8.0
[INFO] [stderr]     Checking rcf v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/lib.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub struct Command {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] 39 |     id: u32,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Command` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/lib.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub struct Command {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] 39 |     id: u32,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Command` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` 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 2.80s
[INFO] running `Command { std: "docker" "inspect" "afb3d7c88adca1370360ba97dae020c440ccb1d6514c88dce802bf490dbeb53f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "afb3d7c88adca1370360ba97dae020c440ccb1d6514c88dce802bf490dbeb53f", kill_on_drop: false }`
[INFO] [stdout] afb3d7c88adca1370360ba97dae020c440ccb1d6514c88dce802bf490dbeb53f
[INFO] checking rcf-0.1.2 against try#6289438dbad80b1a0029c66dd3f6abf57c2c51be for pr-126452-1
[INFO] extracting crate rcf 0.1.2 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate rcf 0.1.2 on toolchain 6289438dbad80b1a0029c66dd3f6abf57c2c51be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rcf 0.1.2
[INFO] finished tweaking crates.io crate rcf 0.1.2
[INFO] tweaked toml for crates.io crate rcf 0.1.2 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate crates.io crate rcf 0.1.2 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" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 048421650c50d44f41a9e40afe54218e1140a263985dc5fa25d3e0d503b734a5
[INFO] running `Command { std: "docker" "start" "-a" "048421650c50d44f41a9e40afe54218e1140a263985dc5fa25d3e0d503b734a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "048421650c50d44f41a9e40afe54218e1140a263985dc5fa25d3e0d503b734a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "048421650c50d44f41a9e40afe54218e1140a263985dc5fa25d3e0d503b734a5", kill_on_drop: false }`
[INFO] [stdout] 048421650c50d44f41a9e40afe54218e1140a263985dc5fa25d3e0d503b734a5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9d04258cbadf5a4e775650aad20470fc49213dca22bd8b14823c8f09305a37ff
[INFO] running `Command { std: "docker" "start" "-a" "9d04258cbadf5a4e775650aad20470fc49213dca22bd8b14823c8f09305a37ff", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.1
[INFO] [stderr]    Compiling memoffset v0.6.1
[INFO] [stderr]    Compiling const_fn v0.4.4
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking numtoa v0.1.0
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking itertools v0.10.0
[INFO] [stderr]     Checking fuzzy-matcher v0.3.7
[INFO] [stderr]     Checking crossbeam-epoch v0.9.1
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]     Checking crossbeam-queue v0.3.1
[INFO] [stderr]     Checking termion v1.5.5
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking crossbeam v0.8.0
[INFO] [stderr]     Checking rcf v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/lib.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub struct Command {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] 39 |     id: u32,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Command` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/lib.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub struct Command {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] 39 |     id: u32,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Command` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` 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 2.45s
[INFO] running `Command { std: "docker" "inspect" "9d04258cbadf5a4e775650aad20470fc49213dca22bd8b14823c8f09305a37ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d04258cbadf5a4e775650aad20470fc49213dca22bd8b14823c8f09305a37ff", kill_on_drop: false }`
[INFO] [stdout] 9d04258cbadf5a4e775650aad20470fc49213dca22bd8b14823c8f09305a37ff