[INFO] cloning repository https://github.com/KGKalani/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/KGKalani/rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKGKalani%2Frust_learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKGKalani%2Frust_learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d236a32b79162e8f306b4f7fd4d94c9f87c496ea
[INFO] testing KGKalani/rust_learning/d236a32b79162e8f306b4f7fd4d94c9f87c496ea against beta-2024-10-19 for beta-1.83-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKGKalani%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/KGKalani/rust_learning on toolchain beta-2024-10-19
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-10-19" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/KGKalani/rust_learning
[INFO] finished tweaking git repo https://github.com/KGKalani/rust_learning
[INFO] tweaked toml for git repo https://github.com/KGKalani/rust_learning written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/KGKalani/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" "+beta-2024-10-19" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-10-19" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2d1cec09b77c8ccb3ada40fa2876e81fd8f2beb4bd46714f52a4b969afe08e38
[INFO] running `Command { std: "docker" "start" "-a" "2d1cec09b77c8ccb3ada40fa2876e81fd8f2beb4bd46714f52a4b969afe08e38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2d1cec09b77c8ccb3ada40fa2876e81fd8f2beb4bd46714f52a4b969afe08e38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d1cec09b77c8ccb3ada40fa2876e81fd8f2beb4bd46714f52a4b969afe08e38", kill_on_drop: false }`
[INFO] [stdout] 2d1cec09b77c8ccb3ada40fa2876e81fd8f2beb4bd46714f52a4b969afe08e38
[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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-10-19" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 382f76b99a7f9bf245180be31528ec03547f0ce0a975094d4520e24b2b5d26df
[INFO] running `Command { std: "docker" "start" "-a" "382f76b99a7f9bf245180be31528ec03547f0ce0a975094d4520e24b2b5d26df", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling getrandom v0.2.15
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling rust_learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ownership_module/fixing_ownershi_errors.rs:130:9
[INFO] [stdout]     |
[INFO] [stdout] 130 |     let mut name = vec![String::from("Ferris")];
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ownership_module/fixing_ownershi_errors.rs:136:9
[INFO] [stdout]     |
[INFO] [stdout] 136 |     let mut name = vec![String::from("Ferris")];
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]   --> src/common_concepts_module/function_concepts.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     x + y + z;  // This is a statement because there is a semmicolon at the end of x + y, this is not return
[INFO] [stdout]    |     ^^^^^^^^^ the arithmetic operation produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let _ = x + y + z;  // This is a statement because there is a semmicolon at the end of x + y, this is not return
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.28s
[INFO] running `Command { std: "docker" "inspect" "382f76b99a7f9bf245180be31528ec03547f0ce0a975094d4520e24b2b5d26df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "382f76b99a7f9bf245180be31528ec03547f0ce0a975094d4520e24b2b5d26df", kill_on_drop: false }`
[INFO] [stdout] 382f76b99a7f9bf245180be31528ec03547f0ce0a975094d4520e24b2b5d26df
[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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-10-19" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b10518985bcb04d63778624a80f47e5ebb6847caee0f581c691c110216fafc33
[INFO] running `Command { std: "docker" "start" "-a" "b10518985bcb04d63778624a80f47e5ebb6847caee0f581c691c110216fafc33", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ownership_module/fixing_ownershi_errors.rs:130:9
[INFO] [stdout]     |
[INFO] [stdout] 130 |     let mut name = vec![String::from("Ferris")];
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ownership_module/fixing_ownershi_errors.rs:136:9
[INFO] [stdout]     |
[INFO] [stdout] 136 |     let mut name = vec![String::from("Ferris")];
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]   --> src/common_concepts_module/function_concepts.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     x + y + z;  // This is a statement because there is a semmicolon at the end of x + y, this is not return
[INFO] [stdout]    |     ^^^^^^^^^ the arithmetic operation produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let _ = x + y + z;  // This is a statement because there is a semmicolon at the end of x + y, this is not return
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.36s
[INFO] running `Command { std: "docker" "inspect" "b10518985bcb04d63778624a80f47e5ebb6847caee0f581c691c110216fafc33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b10518985bcb04d63778624a80f47e5ebb6847caee0f581c691c110216fafc33", kill_on_drop: false }`
[INFO] [stdout] b10518985bcb04d63778624a80f47e5ebb6847caee0f581c691c110216fafc33
[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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-10-19" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ab6b7315546656dfb5d7f72111cfeb087d50b1b87073c39b0a4c9774c444aead
[INFO] running `Command { std: "docker" "start" "-a" "ab6b7315546656dfb5d7f72111cfeb087d50b1b87073c39b0a4c9774c444aead", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/ownership_module/fixing_ownershi_errors.rs:130:9
[INFO] [stderr]     |
[INFO] [stderr] 130 |     let mut name = vec![String::from("Ferris")];
[INFO] [stderr]     |         ----^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/ownership_module/fixing_ownershi_errors.rs:136:9
[INFO] [stderr]     |
[INFO] [stderr] 136 |     let mut name = vec![String::from("Ferris")];
[INFO] [stderr]     |         ----^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]   --> src/common_concepts_module/function_concepts.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 |     x + y + z;  // This is a statement because there is a semmicolon at the end of x + y, this is not return
[INFO] [stderr]    |     ^^^^^^^^^ the arithmetic operation produces a value
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 51 |     let _ = x + y + z;  // This is a statement because there is a semmicolon at the end of x + y, this is not return
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_learning` (bin "rust_learning" test) generated 3 warnings (run `cargo fix --bin "rust_learning" --tests` to apply 2 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_learning-7879b4941ac15962)
[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" "ab6b7315546656dfb5d7f72111cfeb087d50b1b87073c39b0a4c9774c444aead", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab6b7315546656dfb5d7f72111cfeb087d50b1b87073c39b0a4c9774c444aead", kill_on_drop: false }`
[INFO] [stdout] ab6b7315546656dfb5d7f72111cfeb087d50b1b87073c39b0a4c9774c444aead