[INFO] cloning repository https://github.com/jericho1050/rustlings-mysoln
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jericho1050/rustlings-mysoln" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjericho1050%2Frustlings-mysoln", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjericho1050%2Frustlings-mysoln'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 211ed062931e860acd1009481ef58841e97f3094
[INFO] checking jericho1050/rustlings-mysoln against try#9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869 for pr-129249
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjericho1050%2Frustlings-mysoln" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
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[INFO] validating manifest of git repo https://github.com/jericho1050/rustlings-mysoln on toolchain 9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jericho1050/rustlings-mysoln
[INFO] finished tweaking git repo https://github.com/jericho1050/rustlings-mysoln
[INFO] tweaked toml for git repo https://github.com/jericho1050/rustlings-mysoln written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/jericho1050/rustlings-mysoln 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" "+9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 50c8277f1401a99628008a4a3754a0379844845cedb9ff45d69575acffb4fd9c
[INFO] running `Command { std: "docker" "start" "-a" "50c8277f1401a99628008a4a3754a0379844845cedb9ff45d69575acffb4fd9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "50c8277f1401a99628008a4a3754a0379844845cedb9ff45d69575acffb4fd9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50c8277f1401a99628008a4a3754a0379844845cedb9ff45d69575acffb4fd9c", kill_on_drop: false }`
[INFO] [stdout] 50c8277f1401a99628008a4a3754a0379844845cedb9ff45d69575acffb4fd9c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 54b8f8f6ceb335faa5e603bdf3415e7d593f77f432cd663dad0455d6b0eeae4b
[INFO] running `Command { std: "docker" "start" "-a" "54b8f8f6ceb335faa5e603bdf3415e7d593f77f432cd663dad0455d6b0eeae4b", kill_on_drop: false }`
[INFO] [stderr]     Checking exercises v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this conversion is useless `&str` to `&str`
[INFO] [stdout]   --> solutions/09_strings/strings4.rs:25:18
[INFO] [stdout]    |
[INFO] [stdout] 25 |     string_slice("nice weather".into());
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `exercises` (bin "strings4_sol") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: enum `Command` is never used
[INFO] [stdout]   --> solutions/quizzes/quiz2.rs:13:6
[INFO] [stdout]    |
[INFO] [stdout] 13 | enum Command {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `transformer` is never used
[INFO] [stdout]   --> solutions/quizzes/quiz2.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn transformer(input: Vec<(String, Command)>) -> Vec<String> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `transformer_iter` is never used
[INFO] [stdout]   --> solutions/quizzes/quiz2.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub fn transformer_iter(input: Vec<(String, Command)>) -> Vec<String> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `total_cost` is never used
[INFO] [stdout]   --> exercises/13_error_handling/errors2.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn total_cost(item_quantity: &str) -> Result<i32, ParseIntError> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "54b8f8f6ceb335faa5e603bdf3415e7d593f77f432cd663dad0455d6b0eeae4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54b8f8f6ceb335faa5e603bdf3415e7d593f77f432cd663dad0455d6b0eeae4b", kill_on_drop: false }`
[INFO] [stdout] 54b8f8f6ceb335faa5e603bdf3415e7d593f77f432cd663dad0455d6b0eeae4b