[INFO] fetching crate collections2 0.0.1...
[INFO] checking collections2-0.0.1 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate collections2 0.0.1 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate collections2 0.0.1
[INFO] finished tweaking crates.io crate collections2 0.0.1
[INFO] tweaked toml for crates.io crate collections2 0.0.1 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate collections2 0.0.1 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6e4036b98838a22c84710475578abb21b93f3e2f162f9569ab79e3addd22d27d
[INFO] running `Command { std: "docker" "start" "-a" "6e4036b98838a22c84710475578abb21b93f3e2f162f9569ab79e3addd22d27d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6e4036b98838a22c84710475578abb21b93f3e2f162f9569ab79e3addd22d27d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e4036b98838a22c84710475578abb21b93f3e2f162f9569ab79e3addd22d27d", kill_on_drop: false }`
[INFO] [stdout] 6e4036b98838a22c84710475578abb21b93f3e2f162f9569ab79e3addd22d27d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ec305a36667ff3faecbb89be05eb65645cf3493fd9d0620aa792780a62faae09
[INFO] running `Command { std: "docker" "start" "-a" "ec305a36667ff3faecbb89be05eb65645cf3493fd9d0620aa792780a62faae09", kill_on_drop: false }`
[INFO] [stderr]     Checking collections2 v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `self::alloc::*`
[INFO] [stdout]    --> src/list.rs:117:9
[INFO] [stdout]     |
[INFO] [stdout] 117 | pub use self::alloc::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::std::*`
[INFO] [stdout]    --> src/map.rs:193:9
[INFO] [stdout]     |
[INFO] [stdout] 193 | pub use self::std::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::alloc::*`
[INFO] [stdout]    --> src/map.rs:342:9
[INFO] [stdout]     |
[INFO] [stdout] 342 | pub use self::alloc::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::std::*`
[INFO] [stdout]    --> src/set.rs:125:9
[INFO] [stdout]     |
[INFO] [stdout] 125 | pub use self::std::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::alloc::*`
[INFO] [stdout]    --> src/list.rs:117:9
[INFO] [stdout]     |
[INFO] [stdout] 117 | pub use self::alloc::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::std::*`
[INFO] [stdout]    --> src/map.rs:193:9
[INFO] [stdout]     |
[INFO] [stdout] 193 | pub use self::std::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::alloc::*`
[INFO] [stdout]    --> src/map.rs:342:9
[INFO] [stdout]     |
[INFO] [stdout] 342 | pub use self::alloc::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::std::*`
[INFO] [stdout]    --> src/set.rs:125:9
[INFO] [stdout]     |
[INFO] [stdout] 125 | pub use self::std::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `Command { std: "docker" "inspect" "ec305a36667ff3faecbb89be05eb65645cf3493fd9d0620aa792780a62faae09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec305a36667ff3faecbb89be05eb65645cf3493fd9d0620aa792780a62faae09", kill_on_drop: false }`
[INFO] [stdout] ec305a36667ff3faecbb89be05eb65645cf3493fd9d0620aa792780a62faae09