[INFO] fetching crate alloc-singleton 0.1.0...
[INFO] checking alloc-singleton-0.1.0 against master#c2f2db79ca3024f68d22b45aa22b570775c2c4ad for pr-124157
[INFO] extracting crate alloc-singleton 0.1.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate alloc-singleton 0.1.0 on toolchain c2f2db79ca3024f68d22b45aa22b570775c2c4ad
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate alloc-singleton 0.1.0
[INFO] finished tweaking crates.io crate alloc-singleton 0.1.0
[INFO] tweaked toml for crates.io crate alloc-singleton 0.1.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 17 packages to latest compatible versions
[INFO] [stderr]       Adding as-slice v0.1.5 (latest: v0.2.1)
[INFO] [stderr]       Adding generic-array v0.12.4 (latest: v1.0.0)
[INFO] [stderr]       Adding generic-array v0.13.3 (latest: v1.0.0)
[INFO] [stderr]       Adding generic-array v0.14.7 (latest: v1.0.0)
[INFO] [stderr]       Adding proc-macro2 v0.4.30 (latest: v1.0.81)
[INFO] [stderr]       Adding quote v0.6.13 (latest: v1.0.36)
[INFO] [stderr]       Adding rand v0.5.6 (latest: v0.8.5)
[INFO] [stderr]       Adding rand_core v0.3.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_core v0.4.2 (latest: v0.6.4)
[INFO] [stderr]       Adding syn v0.15.44 (latest: v2.0.60)
[INFO] [stderr]       Adding unicode-xid v0.1.0 (latest: v0.2.4)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded owned-singleton v0.1.0
[INFO] [stderr]   Downloaded quote v0.6.13
[INFO] [stderr]   Downloaded owned-singleton-macros v0.1.0
[INFO] [stderr]   Downloaded rand_core v0.3.1
[INFO] [stderr]   Downloaded rand_core v0.4.2
[INFO] [stderr]   Downloaded as-slice v0.1.5
[INFO] [stderr]   Downloaded generic-array v0.12.4
[INFO] [stderr]   Downloaded generic-array v0.13.3
[INFO] [stderr]   Downloaded rand v0.5.6
[INFO] [stderr]   Downloaded proc-macro2 v0.4.30
[INFO] [stderr]   Downloaded syn v0.15.44
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2a47975da3cbdfa376ba0d5a767a4b7bbc7fe8dec8d552735189cef61b89c96a
[INFO] running `Command { std: "docker" "start" "-a" "2a47975da3cbdfa376ba0d5a767a4b7bbc7fe8dec8d552735189cef61b89c96a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2a47975da3cbdfa376ba0d5a767a4b7bbc7fe8dec8d552735189cef61b89c96a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a47975da3cbdfa376ba0d5a767a4b7bbc7fe8dec8d552735189cef61b89c96a", kill_on_drop: false }`
[INFO] [stdout] 2a47975da3cbdfa376ba0d5a767a4b7bbc7fe8dec8d552735189cef61b89c96a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a4df0430faf473e155112a364c763d59a5dded09b93d5d56211f1f460e82dfc2
[INFO] running `Command { std: "docker" "start" "-a" "a4df0430faf473e155112a364c763d59a5dded09b93d5d56211f1f460e82dfc2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]     Checking generic-array v0.13.3
[INFO] [stderr]     Checking generic-array v0.12.4
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]     Checking as-slice v0.1.5
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling owned-singleton-macros v0.1.0
[INFO] [stderr]     Checking owned-singleton v0.1.0
[INFO] [stderr]     Checking alloc-singleton v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: field `0` is never read
[INFO] [stdout]    --> src/stable/pool.rs:294:22
[INFO] [stdout]     |
[INFO] [stdout] 294 |         pub struct A(u32);
[INFO] [stdout]     |                    - ^^^
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    field in this struct
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:11:9
[INFO] [stdout]     |
[INFO] [stdout] 11  | #![deny(warnings)]
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     = note: `#[deny(dead_code)]` implied by `#[deny(warnings)]`
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 294 |         pub struct A(());
[INFO] [stdout]     |                      ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: field `0` is never read
[INFO] [stdout]    --> src/stable/pool.rs:331:22
[INFO] [stdout]     |
[INFO] [stdout] 331 |         pub struct A(u32);
[INFO] [stdout]     |                    - ^^^
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    field in this struct
[INFO] [stdout]     |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 331 |         pub struct A(());
[INFO] [stdout]     |                      ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `alloc-singleton` (lib test) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "a4df0430faf473e155112a364c763d59a5dded09b93d5d56211f1f460e82dfc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4df0430faf473e155112a364c763d59a5dded09b93d5d56211f1f460e82dfc2", kill_on_drop: false }`
[INFO] [stdout] a4df0430faf473e155112a364c763d59a5dded09b93d5d56211f1f460e82dfc2
[INFO] checking alloc-singleton-0.1.0 against try#9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88 for pr-124157
[INFO] extracting crate alloc-singleton 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate alloc-singleton 0.1.0 on toolchain 9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate alloc-singleton 0.1.0
[INFO] finished tweaking crates.io crate alloc-singleton 0.1.0
[INFO] tweaked toml for crates.io crate alloc-singleton 0.1.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 17 packages to latest compatible versions
[INFO] [stderr]       Adding as-slice v0.1.5 (latest: v0.2.1)
[INFO] [stderr]       Adding generic-array v0.12.4 (latest: v1.0.0)
[INFO] [stderr]       Adding generic-array v0.13.3 (latest: v1.0.0)
[INFO] [stderr]       Adding generic-array v0.14.7 (latest: v1.0.0)
[INFO] [stderr]       Adding proc-macro2 v0.4.30 (latest: v1.0.81)
[INFO] [stderr]       Adding quote v0.6.13 (latest: v1.0.36)
[INFO] [stderr]       Adding rand v0.5.6 (latest: v0.8.5)
[INFO] [stderr]       Adding rand_core v0.3.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_core v0.4.2 (latest: v0.6.4)
[INFO] [stderr]       Adding syn v0.15.44 (latest: v2.0.60)
[INFO] [stderr]       Adding unicode-xid v0.1.0 (latest: v0.2.4)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d0b23cd9ff3f6cf9484d334641878fbd688186f985b79f2caf6cf3d2f2392bd5
[INFO] running `Command { std: "docker" "start" "-a" "d0b23cd9ff3f6cf9484d334641878fbd688186f985b79f2caf6cf3d2f2392bd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d0b23cd9ff3f6cf9484d334641878fbd688186f985b79f2caf6cf3d2f2392bd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0b23cd9ff3f6cf9484d334641878fbd688186f985b79f2caf6cf3d2f2392bd5", kill_on_drop: false }`
[INFO] [stdout] d0b23cd9ff3f6cf9484d334641878fbd688186f985b79f2caf6cf3d2f2392bd5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 39746ae7eb59fa2ada7ce0ffe9a7b78d1ef70597cb43b6a0c2974cfa5b40dce9
[INFO] running `Command { std: "docker" "start" "-a" "39746ae7eb59fa2ada7ce0ffe9a7b78d1ef70597cb43b6a0c2974cfa5b40dce9", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]     Checking generic-array v0.13.3
[INFO] [stderr]     Checking generic-array v0.12.4
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]     Checking as-slice v0.1.5
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling owned-singleton-macros v0.1.0
[INFO] [stderr]     Checking owned-singleton v0.1.0
[INFO] [stderr]     Checking alloc-singleton v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: field `0` is never read
[INFO] [stdout]    --> src/stable/pool.rs:294:22
[INFO] [stdout]     |
[INFO] [stdout] 294 |         pub struct A(u32);
[INFO] [stdout]     |                    - ^^^
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    field in this struct
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:11:9
[INFO] [stdout]     |
[INFO] [stdout] 11  | #![deny(warnings)]
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     = note: `#[deny(dead_code)]` implied by `#[deny(warnings)]`
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 294 |         pub struct A(());
[INFO] [stdout]     |                      ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: field `0` is never read
[INFO] [stdout]    --> src/stable/pool.rs:331:22
[INFO] [stdout]     |
[INFO] [stdout] 331 |         pub struct A(u32);
[INFO] [stdout]     |                    - ^^^
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    field in this struct
[INFO] [stdout]     |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 331 |         pub struct A(());
[INFO] [stdout]     |                      ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `alloc-singleton` (lib test) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "39746ae7eb59fa2ada7ce0ffe9a7b78d1ef70597cb43b6a0c2974cfa5b40dce9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39746ae7eb59fa2ada7ce0ffe9a7b78d1ef70597cb43b6a0c2974cfa5b40dce9", kill_on_drop: false }`
[INFO] [stdout] 39746ae7eb59fa2ada7ce0ffe9a7b78d1ef70597cb43b6a0c2974cfa5b40dce9
