[INFO] fetching crate int-vec-2d 0.1.3...
[INFO] checking int-vec-2d-0.1.3 against master#30f74ff0dc4d66debc8b50724c446f817e5f75f4 for pr-121848-1
[INFO] extracting crate int-vec-2d 0.1.3 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate int-vec-2d 0.1.3 on toolchain 30f74ff0dc4d66debc8b50724c446f817e5f75f4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate int-vec-2d 0.1.3
[INFO] finished tweaking crates.io crate int-vec-2d 0.1.3
[INFO] tweaked toml for crates.io crate int-vec-2d 0.1.3 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded macro-attr-2018 v3.0.0
[INFO] [stderr]   Downloaded enum-derive-2018 v3.0.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b2fc2ce93d818e31d5c560fa702e151a63c42310ebd73f2bb9214d412287d617
[INFO] running `Command { std: "docker" "start" "-a" "b2fc2ce93d818e31d5c560fa702e151a63c42310ebd73f2bb9214d412287d617", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b2fc2ce93d818e31d5c560fa702e151a63c42310ebd73f2bb9214d412287d617", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2fc2ce93d818e31d5c560fa702e151a63c42310ebd73f2bb9214d412287d617", kill_on_drop: false }`
[INFO] [stdout] b2fc2ce93d818e31d5c560fa702e151a63c42310ebd73f2bb9214d412287d617
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e35f6e45dcef07e8b3142cb57aa75274db52f3838362860fe2ed61d2de04f4ba
[INFO] running `Command { std: "docker" "start" "-a" "e35f6e45dcef07e8b3142cb57aa75274db52f3838362860fe2ed61d2de04f4ba", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]     Checking regex-syntax v0.8.3
[INFO] [stderr]     Checking macro-attr-2018 v3.0.0
[INFO] [stderr]     Checking enum-derive-2018 v3.0.1
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking int-vec-2d v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] error: the item `DoubleEndedIterator` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:19:18
[INFO] [stdout]    |
[INFO] [stdout] 19 | use core::iter::{DoubleEndedIterator, FusedIterator, Iterator, TrustedLen};
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/30f74ff0dc4d66debc8b50724c446f817e5f75f4/library/core/src/prelude/mod.rs:38:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `DoubleEndedIterator` is already defined here
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:5:9
[INFO] [stdout]    |
[INFO] [stdout] 5  | #![deny(warnings)]
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    = note: `#[deny(unused_imports)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `Iterator` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:19:54
[INFO] [stdout]    |
[INFO] [stdout] 19 | use core::iter::{DoubleEndedIterator, FusedIterator, Iterator, TrustedLen};
[INFO] [stdout]    |                                                      ^^^^^^^^
[INFO] [stdout]   --> /rustc/30f74ff0dc4d66debc8b50724c446f817e5f75f4/library/core/src/prelude/mod.rs:38:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Iterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `Option` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:22:20
[INFO] [stdout]    |
[INFO] [stdout] 22 | use core::option::{Option};
[INFO] [stdout]    |                    ^^^^^^
[INFO] [stdout]   --> /rustc/30f74ff0dc4d66debc8b50724c446f817e5f75f4/library/core/src/prelude/mod.rs:38:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Option` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `int-vec-2d` (lib) due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e35f6e45dcef07e8b3142cb57aa75274db52f3838362860fe2ed61d2de04f4ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e35f6e45dcef07e8b3142cb57aa75274db52f3838362860fe2ed61d2de04f4ba", kill_on_drop: false }`
[INFO] [stdout] e35f6e45dcef07e8b3142cb57aa75274db52f3838362860fe2ed61d2de04f4ba
