[INFO] fetching crate alt_serde 1.0.119...
[INFO] checking alt_serde-1.0.119 against master#af4a5a13a15fa0c60e06321077ef452f769b42fd for pr-122960-3
[INFO] extracting crate alt_serde 1.0.119 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate alt_serde 1.0.119 on toolchain af4a5a13a15fa0c60e06321077ef452f769b42fd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate alt_serde 1.0.119
[INFO] finished tweaking crates.io crate alt_serde 1.0.119
[INFO] tweaked toml for crates.io crate alt_serde 1.0.119 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 6 packages
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.57)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded alt_serde_derive v1.0.119
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 827dceac157932f52bd1e10928faea7981d05268a3f87df0a5daa02eef94228c
[INFO] running `Command { std: "docker" "start" "-a" "827dceac157932f52bd1e10928faea7981d05268a3f87df0a5daa02eef94228c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "827dceac157932f52bd1e10928faea7981d05268a3f87df0a5daa02eef94228c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "827dceac157932f52bd1e10928faea7981d05268a3f87df0a5daa02eef94228c", kill_on_drop: false }`
[INFO] [stdout] 827dceac157932f52bd1e10928faea7981d05268a3f87df0a5daa02eef94228c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 17dc38abacb4b67bd13435c913504452ca0247a0bd526bf1c7cb50d186a732bf
[INFO] running `Command { std: "docker" "start" "-a" "17dc38abacb4b67bd13435c913504452ca0247a0bd526bf1c7cb50d186a732bf", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling alt_serde_derive v1.0.119
[INFO] [stderr]    Compiling alt_serde v1.0.119 (/opt/rustwide/workdir)
[INFO] [stdout] error: unused import: `mem`
[INFO] [stdout]    --> src/lib.rs:160:37
[INFO] [stdout]     |
[INFO] [stdout] 160 |     pub use self::core::{cmp, iter, mem, num, slice, str};
[INFO] [stdout]     |                                     ^^^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:142:23
[INFO] [stdout]     |
[INFO] [stdout] 142 | #![deny(missing_docs, unused_imports)]
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `Into` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:167:47
[INFO] [stdout]     |
[INFO] [stdout] 167 |     pub use self::core::convert::{self, From, Into};
[INFO] [stdout]     |                                               ^^^^
[INFO] [stdout]    --> /rustc/af4a5a13a15fa0c60e06321077ef452f769b42fd/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]     |
[INFO] [stdout]     = note: the item `Into` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `alt_serde` (lib) due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "17dc38abacb4b67bd13435c913504452ca0247a0bd526bf1c7cb50d186a732bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17dc38abacb4b67bd13435c913504452ca0247a0bd526bf1c7cb50d186a732bf", kill_on_drop: false }`
[INFO] [stdout] 17dc38abacb4b67bd13435c913504452ca0247a0bd526bf1c7cb50d186a732bf