[INFO] cloning repository https://github.com/WanderHuang/rust_lang_learn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/WanderHuang/rust_lang_learn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWanderHuang%2Frust_lang_learn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWanderHuang%2Frust_lang_learn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 08424366760fa2d47ccc77207bb0036178ab8cd2
[INFO] checking WanderHuang/rust_lang_learn against master#3aedcf06b73fc36feeebca3d579e1d2a6c40acc5 for pr-65819
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWanderHuang%2Frust_lang_learn" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/WanderHuang/rust_lang_learn on toolchain 3aedcf06b73fc36feeebca3d579e1d2a6c40acc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/WanderHuang/rust_lang_learn
[INFO] finished tweaking git repo https://github.com/WanderHuang/rust_lang_learn
[INFO] tweaked toml for git repo https://github.com/WanderHuang/rust_lang_learn written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/WanderHuang/rust_lang_learn already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: profiles for the non root package will be ignored, specify profiles at the workspace root:
[INFO] [stderr] package:   /workspace/builds/worker-5/source/crates/wasm-cache/Cargo.toml
[INFO] [stderr] workspace: /workspace/builds/worker-5/source/Cargo.toml
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] efa5bf76b46eaa5ef446331c919280ba190673eb31c483f08a30e80ad0cc0466
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "efa5bf76b46eaa5ef446331c919280ba190673eb31c483f08a30e80ad0cc0466", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "efa5bf76b46eaa5ef446331c919280ba190673eb31c483f08a30e80ad0cc0466", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efa5bf76b46eaa5ef446331c919280ba190673eb31c483f08a30e80ad0cc0466", kill_on_drop: false }`
[INFO] [stdout] efa5bf76b46eaa5ef446331c919280ba190673eb31c483f08a30e80ad0cc0466
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c90980daee10669427b637fb06430c0b0df5a2a70e5141cd75cd82b5a7f51f97
[INFO] running `Command { std: "docker" "start" "-a" "c90980daee10669427b637fb06430c0b0df5a2a70e5141cd75cd82b5a7f51f97", kill_on_drop: false }`
[INFO] [stderr] warning: profiles for the non root package will be ignored, specify profiles at the workspace root:
[INFO] [stderr] package:   /opt/rustwide/workdir/crates/wasm-cache/Cargo.toml
[INFO] [stderr] workspace: /opt/rustwide/workdir/Cargo.toml
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.70
[INFO] [stderr]     Checking once_cell v1.7.0
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]     Checking regex-syntax v0.6.22
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]    Compiling wasm-bindgen v0.2.70
[INFO] [stderr]     Checking ahash v0.4.7
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]    Compiling wasm-bindgen-test-macro v0.3.20
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking lru v0.6.5
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]     Checking regex v1.4.3
[INFO] [stderr]     Checking env_logger v0.8.3
[INFO] [stderr]     Checking test_lang v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::time`
[INFO] [stdout]  --> src/thread.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::time;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `thread::sleep`
[INFO] [stdout]  --> src/thread.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     thread::sleep,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time`
[INFO] [stdout]  --> src/thread.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::time;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `thread::sleep`
[INFO] [stdout]  --> src/thread.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     thread::sleep,
[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]    Compiling wasm-bindgen-backend v0.2.70
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.70
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.70
[INFO] [stderr]     Checking js-sys v0.3.47
[INFO] [stderr]     Checking console_error_panic_hook v0.1.6
[INFO] [stderr]     Checking wasm-cache v0.1.0 (/opt/rustwide/workdir/crates/wasm-cache)
[INFO] [stderr]     Checking wasm-bindgen-futures v0.4.20
[INFO] [stderr]     Checking wasm-bindgen-test v0.3.20
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 36.93s
[INFO] running `Command { std: "docker" "inspect" "c90980daee10669427b637fb06430c0b0df5a2a70e5141cd75cd82b5a7f51f97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c90980daee10669427b637fb06430c0b0df5a2a70e5141cd75cd82b5a7f51f97", kill_on_drop: false }`
[INFO] [stdout] c90980daee10669427b637fb06430c0b0df5a2a70e5141cd75cd82b5a7f51f97