[INFO] cloning repository https://github.com/KimWang906/Rust_Learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/KimWang906/Rust_Learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKimWang906%2FRust_Learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKimWang906%2FRust_Learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 706c243cd3c719242a5a1f78d611f77cd84902ed
[INFO] checking KimWang906/Rust_Learning against try#024378d9203a4009ed73d6db2681b88a8d74ce7a for pr-112160
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKimWang906%2FRust_Learning" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/KimWang906/Rust_Learning on toolchain 024378d9203a4009ed73d6db2681b88a8d74ce7a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+024378d9203a4009ed73d6db2681b88a8d74ce7a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/KimWang906/Rust_Learning
[INFO] finished tweaking git repo https://github.com/KimWang906/Rust_Learning
[INFO] tweaked toml for git repo https://github.com/KimWang906/Rust_Learning written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/KimWang906/Rust_Learning 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" "+024378d9203a4009ed73d6db2681b88a8d74ce7a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+024378d9203a4009ed73d6db2681b88a8d74ce7a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d3fb9e26ff55d3b9c4f29eb22a9ed9c08de30e4cd4990e56f8b82a8a71de8367
[INFO] running `Command { std: "docker" "start" "-a" "d3fb9e26ff55d3b9c4f29eb22a9ed9c08de30e4cd4990e56f8b82a8a71de8367", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d3fb9e26ff55d3b9c4f29eb22a9ed9c08de30e4cd4990e56f8b82a8a71de8367", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3fb9e26ff55d3b9c4f29eb22a9ed9c08de30e4cd4990e56f8b82a8a71de8367", kill_on_drop: false }`
[INFO] [stdout] d3fb9e26ff55d3b9c4f29eb22a9ed9c08de30e4cd4990e56f8b82a8a71de8367
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+024378d9203a4009ed73d6db2681b88a8d74ce7a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c73be432e877d8fa39e7f1ee3a16c98f8211577762ccdd69556040befa717054
[INFO] running `Command { std: "docker" "start" "-a" "c73be432e877d8fa39e7f1ee3a16c98f8211577762ccdd69556040befa717054", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking more_hash_map v0.1.0 (/opt/rustwide/workdir/more_hash_map)
[INFO] [stderr]     Checking implementing_iterator v0.1.0 (/opt/rustwide/workdir/implementing_iterator)
[INFO] [stderr]     Checking chars v0.1.0 (/opt/rustwide/workdir/chars)
[INFO] [stderr]     Checking manual_debug_impl v0.1.0 (/opt/rustwide/workdir/manual_debug_impl)
[INFO] [stderr]     Checking filter_and_filter_map v0.1.0 (/opt/rustwide/workdir/filter_and_filter_map)
[INFO] [stderr]     Checking more_generics v0.1.0 (/opt/rustwide/workdir/more_generics)
[INFO] [stderr]     Checking variable_and_function v0.1.0 (/opt/rustwide/workdir/variable_and_function)
[INFO] [stderr]     Checking match_indices_peekable_inspect v0.1.0 (/opt/rustwide/workdir/match_indices_peekable_inspect)
[INFO] [stderr]     Checking trait_rs v0.1.0 (/opt/rustwide/workdir/trait_rs)
[INFO] [stderr]     Checking zipping_iterators v0.1.0 (/opt/rustwide/workdir/zipping_iterators)
[INFO] [stderr]     Checking find_position_cycle v0.1.0 (/opt/rustwide/workdir/find_position_cycle)
[INFO] [stderr]     Checking and_or_for_option v0.1.0 (/opt/rustwide/workdir/and_or_for_option)
[INFO] [stderr]     Checking dbg_macro v0.1.0 (/opt/rustwide/workdir/dbg_macro)
[INFO] [stderr]     Checking blanket_trait_implementations v0.1.0 (/opt/rustwide/workdir/blanket_trait_implementations)
[INFO] [stderr]     Checking result v0.1.0 (/opt/rustwide/workdir/result)
[INFO] [stderr]     Checking number_arithmetic_operation v0.1.0 (/opt/rustwide/workdir/number_arithmetic_operation)
[INFO] [stdout] error: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> chars/src/main.rs:11:29
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let binding = big_string.clone();
[INFO] [stdout]    |                             ^^^^^^^^ unnecessary method call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[deny(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `chars` (bin "chars") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "c73be432e877d8fa39e7f1ee3a16c98f8211577762ccdd69556040befa717054", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c73be432e877d8fa39e7f1ee3a16c98f8211577762ccdd69556040befa717054", kill_on_drop: false }`
[INFO] [stdout] c73be432e877d8fa39e7f1ee3a16c98f8211577762ccdd69556040befa717054