[INFO] cloning repository https://github.com/Aeronica/learn_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Aeronica/learn_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAeronica%2Flearn_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAeronica%2Flearn_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2e32bc7f32cdd996fab6da9b988d5954ed581cc7
[INFO] testing Aeronica/learn_rust against 1.75.0 for beta-1.76-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAeronica%2Flearn_rust" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Aeronica/learn_rust on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Aeronica/learn_rust
[INFO] removed 0 missing examples
[INFO] finished tweaking git repo https://github.com/Aeronica/learn_rust
[INFO] tweaked toml for git repo https://github.com/Aeronica/learn_rust written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Aeronica/learn_rust 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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 17ac72a9325f2fcba27876b6fbaafbf178d2fb2e1f51abf136c0d1f3546b21fd
[INFO] running `Command { std: "docker" "start" "-a" "17ac72a9325f2fcba27876b6fbaafbf178d2fb2e1f51abf136c0d1f3546b21fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "17ac72a9325f2fcba27876b6fbaafbf178d2fb2e1f51abf136c0d1f3546b21fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17ac72a9325f2fcba27876b6fbaafbf178d2fb2e1f51abf136c0d1f3546b21fd", kill_on_drop: false }`
[INFO] [stdout] 17ac72a9325f2fcba27876b6fbaafbf178d2fb2e1f51abf136c0d1f3546b21fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7cc590906336d8a93124946bd2074e0560a38d1d830a265a3b97b72e4555495e
[INFO] running `Command { std: "docker" "start" "-a" "7cc590906336d8a93124946bd2074e0560a38d1d830a265a3b97b72e4555495e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling getrandom v0.2.8
[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 learn_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.54s
[INFO] running `Command { std: "docker" "inspect" "7cc590906336d8a93124946bd2074e0560a38d1d830a265a3b97b72e4555495e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7cc590906336d8a93124946bd2074e0560a38d1d830a265a3b97b72e4555495e", kill_on_drop: false }`
[INFO] [stdout] 7cc590906336d8a93124946bd2074e0560a38d1d830a265a3b97b72e4555495e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 76cd3679e81c060381e7a9d5f598e4a4111a10ecb86220d4fbe34c1f42b08b31
[INFO] running `Command { std: "docker" "start" "-a" "76cd3679e81c060381e7a9d5f598e4a4111a10ecb86220d4fbe34c1f42b08b31", kill_on_drop: false }`
[INFO] [stderr]    Compiling learn_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0384]: cannot assign twice to immutable variable `x`
[INFO] [stdout]  --> examples/section_3_1_0_variables_mutability.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let x = 5;
[INFO] [stdout]   |         -
[INFO] [stdout]   |         |
[INFO] [stdout]   |         first assignment to `x`
[INFO] [stdout]   |         help: consider making this binding mutable: `mut x`
[INFO] [stdout] 3 |     println!("The value of x is: {x}");
[INFO] [stdout] 4 |     x = 6;
[INFO] [stdout]   |     ^^^^^ cannot assign twice to immutable variable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `THREE_HOURS_IN_SECONDS` is never used
[INFO] [stdout]  --> examples/section_3_1_2_variables_mutability_constants.rs:2:11
[INFO] [stdout]   |
[INFO] [stdout] 2 |     const THREE_HOURS_IN_SECONDS: u32 = 60 * 60 * 3;
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `spaces`
[INFO] [stdout]  --> examples/section_3_1_5_variables_mutability_shadowing.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let spaces = spaces.len();
[INFO] [stdout]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_spaces`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0384`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `learn_rust` (example "section_3_1_0_variables_mutability") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]  --> examples/section_3_1_6_variables_mutability_shadowing.rs:3:14
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let mut spaces = "   ";
[INFO] [stdout]   |                      ----- expected due to this value
[INFO] [stdout] 3 |     spaces = spaces.len();
[INFO] [stdout]   |              ^^^^^^^^^^^^ expected `&str`, found `usize`
[INFO] [stdout]   |
[INFO] [stdout] help: try removing the method call
[INFO] [stdout]   |
[INFO] [stdout] 3 -     spaces = spaces.len();
[INFO] [stdout] 3 +     spaces = spaces;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0284]: type annotations needed
[INFO] [stdout]  --> examples/section_3_2_1_data_types.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let guess = "42".parse().expect("Not a number!");
[INFO] [stdout]   |         ^^^^^        ----- type must be known at this point
[INFO] [stdout]   |
[INFO] [stdout]   = note: cannot satisfy `<_ as FromStr>::Err == _`
[INFO] [stdout] help: consider giving `guess` an explicit type
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let guess: /* Type */ = "42".parse().expect("Not a number!");
[INFO] [stdout]   |              ++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `learn_rust` (example "section_3_1_6_variables_mutability_shadowing") due to 2 previous errors
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0284`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `learn_rust` (example "section_3_2_1_data_types") due to 2 previous errors
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "76cd3679e81c060381e7a9d5f598e4a4111a10ecb86220d4fbe34c1f42b08b31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76cd3679e81c060381e7a9d5f598e4a4111a10ecb86220d4fbe34c1f42b08b31", kill_on_drop: false }`
[INFO] [stdout] 76cd3679e81c060381e7a9d5f598e4a4111a10ecb86220d4fbe34c1f42b08b31
