[INFO] fetching crate learn-alg 0.1.1...
[INFO] testing learn-alg-0.1.1 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate learn-alg 0.1.1 into /workspace/builds/worker-110/source
[INFO] validating manifest of crates.io crate learn-alg 0.1.1 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate learn-alg 0.1.1
[INFO] finished tweaking crates.io crate learn-alg 0.1.1
[INFO] tweaked toml for crates.io crate learn-alg 0.1.1 written to /workspace/builds/worker-110/source/Cargo.toml
[INFO] crate crates.io crate learn-alg 0.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b78e71d6fc4fd45716e98ba0c313dc4e1391f1567da7826fe2631ebe7e6d555b
[INFO] running `Command { std: "docker" "start" "-a" "b78e71d6fc4fd45716e98ba0c313dc4e1391f1567da7826fe2631ebe7e6d555b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b78e71d6fc4fd45716e98ba0c313dc4e1391f1567da7826fe2631ebe7e6d555b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b78e71d6fc4fd45716e98ba0c313dc4e1391f1567da7826fe2631ebe7e6d555b", kill_on_drop: false }`
[INFO] [stdout] b78e71d6fc4fd45716e98ba0c313dc4e1391f1567da7826fe2631ebe7e6d555b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c898c91f0bc54c53ea06425eeef132423e0619435bdea9ec5dc085e9d7b3ba71
[INFO] running `Command { std: "docker" "start" "-a" "c898c91f0bc54c53ea06425eeef132423e0619435bdea9ec5dc085e9d7b3ba71", kill_on_drop: false }`
[INFO] [stderr]    Compiling learn-alg v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Ref`
[INFO] [stdout]  --> src/bin/lru.rs:8:17
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::cell::{Ref, RefCell};
[INFO] [stdout]   |                 ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.98s
[INFO] running `Command { std: "docker" "inspect" "c898c91f0bc54c53ea06425eeef132423e0619435bdea9ec5dc085e9d7b3ba71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c898c91f0bc54c53ea06425eeef132423e0619435bdea9ec5dc085e9d7b3ba71", kill_on_drop: false }`
[INFO] [stdout] c898c91f0bc54c53ea06425eeef132423e0619435bdea9ec5dc085e9d7b3ba71
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5f70a5a5485169631e79094f9d7213f831809bb0dee45b4ac1afb4e2aef956f6
[INFO] running `Command { std: "docker" "start" "-a" "5f70a5a5485169631e79094f9d7213f831809bb0dee45b4ac1afb4e2aef956f6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling learn-alg v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Ref`
[INFO] [stdout]  --> src/bin/lru.rs:8:17
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::cell::{Ref, RefCell};
[INFO] [stdout]   |                 ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.28s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/learn_alg-b3fa03236713dc16)
[INFO] [stderr]   Executable unittests src/bin/lru.rs (/opt/rustwide/target/debug/deps/lru-e3e246976863d9db)
[INFO] [stderr]   Executable unittests src/bin/palindrome.rs (/opt/rustwide/target/debug/deps/palindrome-557520edfaafbd8f)
[INFO] [stderr]   Executable unittests src/bin/str_convert.rs (/opt/rustwide/target/debug/deps/str_convert-1691279d81c39ea4)
[INFO] running `Command { std: "docker" "inspect" "5f70a5a5485169631e79094f9d7213f831809bb0dee45b4ac1afb4e2aef956f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f70a5a5485169631e79094f9d7213f831809bb0dee45b4ac1afb4e2aef956f6", kill_on_drop: false }`
[INFO] [stdout] 5f70a5a5485169631e79094f9d7213f831809bb0dee45b4ac1afb4e2aef956f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4e2ae9029fec2949774784b189c372896013380979a88e05149331f1e566c1e2
[INFO] running `Command { std: "docker" "start" "-a" "4e2ae9029fec2949774784b189c372896013380979a88e05149331f1e566c1e2", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `Ref`
[INFO] [stderr]  --> src/bin/lru.rs:8:17
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::cell::{Ref, RefCell};
[INFO] [stderr]   |                 ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `learn-alg` (bin "lru" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/learn_alg-b3fa03236713dc16)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/lru.rs (/opt/rustwide/target/debug/deps/lru-e3e246976863d9db)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::test_lru ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/palindrome.rs (/opt/rustwide/target/debug/deps/palindrome-557520edfaafbd8f)
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test tests::test_回文偶数 ... ok
[INFO] [stdout] test tests::test_回文字符串 ... ok
[INFO] [stdout] test tests::test_回文奇数 ... ok
[INFO] [stdout] test tests::test_回文零 ... ok
[INFO] [stdout] test tests::test_回文非 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/str_convert.rs (/opt/rustwide/target/debug/deps/str_convert-1691279d81c39ea4)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4e2ae9029fec2949774784b189c372896013380979a88e05149331f1e566c1e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e2ae9029fec2949774784b189c372896013380979a88e05149331f1e566c1e2", kill_on_drop: false }`
[INFO] [stdout] 4e2ae9029fec2949774784b189c372896013380979a88e05149331f1e566c1e2