[INFO] fetching crate learn-alg 0.1.1...
[INFO] testing learn-alg-0.1.1 against try#b83b707f97d809763b7861afa7638871f3339a33 for pr-145838-1
[INFO] extracting crate learn-alg 0.1.1 into /workspace/builds/worker-4-tc2/source
[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-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate learn-alg 0.1.1 on toolchain b83b707f97d809763b7861afa7638871f3339a33
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate learn-alg 0.1.1 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" "+b83b707f97d809763b7861afa7638871f3339a33" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 90c9d165667400da4869d1e1d48607db675a171f23e112b81dba15d984dabf16
[INFO] running `Command { std: "docker" "start" "-a" "90c9d165667400da4869d1e1d48607db675a171f23e112b81dba15d984dabf16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "90c9d165667400da4869d1e1d48607db675a171f23e112b81dba15d984dabf16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90c9d165667400da4869d1e1d48607db675a171f23e112b81dba15d984dabf16", kill_on_drop: false }`
[INFO] [stdout] 90c9d165667400da4869d1e1d48607db675a171f23e112b81dba15d984dabf16
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 596c51c7ee259f231ca5ca48046750092ac5fa3c2d40f86bf8c07c6663c7e889
[INFO] running `Command { std: "docker" "start" "-a" "596c51c7ee259f231ca5ca48046750092ac5fa3c2d40f86bf8c07c6663c7e889", 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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Reverse` is never used
[INFO] [stdout]  --> src/bin/palindrome.rs:2:7
[INFO] [stdout]   |
[INFO] [stdout] 2 | trait Reverse: PartialEq + Sized {
[INFO] [stdout]   |       ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.74s
[INFO] running `Command { std: "docker" "inspect" "596c51c7ee259f231ca5ca48046750092ac5fa3c2d40f86bf8c07c6663c7e889", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "596c51c7ee259f231ca5ca48046750092ac5fa3c2d40f86bf8c07c6663c7e889", kill_on_drop: false }`
[INFO] [stdout] 596c51c7ee259f231ca5ca48046750092ac5fa3c2d40f86bf8c07c6663c7e889
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e33612221ee98a22235c5e0a6b83eecc796c02a736d98e737c85fb0776fcd4fc
[INFO] running `Command { std: "docker" "start" "-a" "e33612221ee98a22235c5e0a6b83eecc796c02a736d98e737c85fb0776fcd4fc", 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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.65s
[INFO] running `Command { std: "docker" "inspect" "e33612221ee98a22235c5e0a6b83eecc796c02a736d98e737c85fb0776fcd4fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e33612221ee98a22235c5e0a6b83eecc796c02a736d98e737c85fb0776fcd4fc", kill_on_drop: false }`
[INFO] [stdout] e33612221ee98a22235c5e0a6b83eecc796c02a736d98e737c85fb0776fcd4fc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7166c363aace0d398cd659211ad7adfd89c9f59a391cd041f7c9c4c8925ba3d9
[INFO] running `Command { std: "docker" "start" "-a" "7166c363aace0d398cd659211ad7adfd89c9f59a391cd041f7c9c4c8925ba3d9", 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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `learn-alg` (bin "lru" test) generated 1 warning (run `cargo fix --bin "lru" --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/learn_alg-a8d1eb5b5ba0f705)
[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] [stderr]      Running unittests src/bin/lru.rs (/opt/rustwide/target/debug/deps/lru-b3b3c651c4f31be7)
[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-7c394b8605dfb41a)
[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_回文零 ... ok
[INFO] [stdout] test tests::test_回文非 ... ok
[INFO] [stdout] test tests::test_回文奇数 ... 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-8992a30fb9efe2e2)
[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" "7166c363aace0d398cd659211ad7adfd89c9f59a391cd041f7c9c4c8925ba3d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7166c363aace0d398cd659211ad7adfd89c9f59a391cd041f7c9c4c8925ba3d9", kill_on_drop: false }`
[INFO] [stdout] 7166c363aace0d398cd659211ad7adfd89c9f59a391cd041f7c9c4c8925ba3d9