[INFO] cloning repository https://github.com/xiongchenyu6/learn_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/xiongchenyu6/learn_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxiongchenyu6%2Flearn_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxiongchenyu6%2Flearn_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 559cab6130342e09bc00c8690cd2966d69efb982
[INFO] checking xiongchenyu6/learn_rust against master#18a6d911caba59605eb03db1452848a85d2e5879 for pr-112743
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxiongchenyu6%2Flearn_rust" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/xiongchenyu6/learn_rust on toolchain 18a6d911caba59605eb03db1452848a85d2e5879
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+18a6d911caba59605eb03db1452848a85d2e5879" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/xiongchenyu6/learn_rust
[INFO] finished tweaking git repo https://github.com/xiongchenyu6/learn_rust
[INFO] tweaked toml for git repo https://github.com/xiongchenyu6/learn_rust written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/xiongchenyu6/learn_rust 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" "+18a6d911caba59605eb03db1452848a85d2e5879" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+18a6d911caba59605eb03db1452848a85d2e5879" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2974a954edec7b799eeb44fc381fcd649b225e87ed2584128325cd92e248e7ba
[INFO] running `Command { std: "docker" "start" "-a" "2974a954edec7b799eeb44fc381fcd649b225e87ed2584128325cd92e248e7ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2974a954edec7b799eeb44fc381fcd649b225e87ed2584128325cd92e248e7ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2974a954edec7b799eeb44fc381fcd649b225e87ed2584128325cd92e248e7ba", kill_on_drop: false }`
[INFO] [stdout] 2974a954edec7b799eeb44fc381fcd649b225e87ed2584128325cd92e248e7ba
[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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+18a6d911caba59605eb03db1452848a85d2e5879" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ebd521dd16cb7fbcd21152e1e199a549f8da71f214d344b991e2944cb8434606
[INFO] running `Command { std: "docker" "start" "-a" "ebd521dd16cb7fbcd21152e1e199a549f8da71f214d344b991e2944cb8434606", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]    Compiling syn v1.0.103
[INFO] [stderr]    Compiling siphasher v0.3.10
[INFO] [stderr]    Compiling cc v1.0.76
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling pkg-config v0.3.26
[INFO] [stderr]     Checking bytes v1.2.1
[INFO] [stderr]    Compiling tokio v1.22.0
[INFO] [stderr]    Compiling serde v1.0.147
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling parking_lot_core v0.9.4
[INFO] [stderr]    Compiling futures-task v0.3.25
[INFO] [stderr]    Compiling openssl v0.10.42
[INFO] [stderr]    Compiling futures-util v0.3.25
[INFO] [stderr]     Checking new_debug_unreachable v1.0.4
[INFO] [stderr]    Compiling indexmap v1.9.2
[INFO] [stderr]    Compiling futures-channel v0.3.25
[INFO] [stderr]    Compiling native-tls v0.2.11
[INFO] [stderr]     Checking mac v0.1.1
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[INFO] [stderr]    Compiling rand_core v0.6.4
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[INFO] [stderr]    Compiling string_cache_codegen v0.5.2
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]    Compiling phf_codegen v0.8.0
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[INFO] [stderr]     Checking string_cache v0.8.4
[INFO] [stderr]     Checking serde_urlencoded v0.7.1
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[INFO] [stderr]    Compiling openssl-macros v0.1.0
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[INFO] [stderr]    Compiling cssparser-macros v0.6.0
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[INFO] [stderr]     Checking learn_rust v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Layout`, `alloc`, `dealloc`
[INFO] [stdout]  --> src/main.rs:1:18
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::alloc::{alloc, dealloc, Layout};
[INFO] [stdout]   |                  ^^^^^  ^^^^^^^  ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ptr`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::ptr;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Layout`, `alloc`, `dealloc`
[INFO] [stdout]  --> src/main.rs:1:18
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::alloc::{alloc, dealloc, Layout};
[INFO] [stdout]   |                  ^^^^^  ^^^^^^^  ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ptr`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::ptr;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.81s
[INFO] running `Command { std: "docker" "inspect" "ebd521dd16cb7fbcd21152e1e199a549f8da71f214d344b991e2944cb8434606", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ebd521dd16cb7fbcd21152e1e199a549f8da71f214d344b991e2944cb8434606", kill_on_drop: false }`
[INFO] [stdout] ebd521dd16cb7fbcd21152e1e199a549f8da71f214d344b991e2944cb8434606