[INFO] cloning repository https://github.com/CollinValley/rust_practice
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/CollinValley/rust_practice" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCollinValley%2Frust_practice", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCollinValley%2Frust_practice'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f43ee9bf1397a7e46b78a5a03bc6811988dfc58f
[INFO] checking CollinValley/rust_practice against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCollinValley%2Frust_practice" "/workspace/builds/worker-48/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-48/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/CollinValley/rust_practice on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/CollinValley/rust_practice
[INFO] finished tweaking git repo https://github.com/CollinValley/rust_practice
[INFO] tweaked toml for git repo https://github.com/CollinValley/rust_practice written to /workspace/builds/worker-48/source/Cargo.toml
[INFO] crate git repo https://github.com/CollinValley/rust_practice already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "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-48/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 583111d2e409c7b9d73a9e39c2d62ca86774da3911375077561d377415addc8c
[INFO] running `Command { std: "docker" "start" "-a" "583111d2e409c7b9d73a9e39c2d62ca86774da3911375077561d377415addc8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "583111d2e409c7b9d73a9e39c2d62ca86774da3911375077561d377415addc8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "583111d2e409c7b9d73a9e39c2d62ca86774da3911375077561d377415addc8c", kill_on_drop: false }`
[INFO] [stdout] 583111d2e409c7b9d73a9e39c2d62ca86774da3911375077561d377415addc8c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fd8a8c497114cb78349b3917f95bf259b0e61ffcc35ddfaa27a54a651b646b85
[INFO] running `Command { std: "docker" "start" "-a" "fd8a8c497114cb78349b3917f95bf259b0e61ffcc35ddfaa27a54a651b646b85", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling num-bigint v0.2.1
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling num-complex v0.2.1
[INFO] [stderr]    Compiling num-rational v0.2.1
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]     Checking rust_practice v0.1.0 (/tmp/fixit)
[INFO] [stderr]    Migrating src/main.rs from 2018 edition to 2021
[INFO] [stderr]        Fixed src/chapter_11.rs (1 fix)
[INFO] [stderr]        Fixed src/chapter_10.rs (1 fix)
[INFO] [stdout] warning: struct is never constructed: `Extrema`
[INFO] [stdout]    --> src/chapter_9.rs:157:8
[INFO] [stdout]     |
[INFO] [stdout] 157 | struct Extrema<'elt> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `find_extrema`
[INFO] [stdout]    --> src/chapter_9.rs:162:4
[INFO] [stdout]     |
[INFO] [stdout] 162 | fn find_extrema<'s>(slice: &'s [i32]) -> Extrema<'s> {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `say_hello`
[INFO] [stdout]  --> src/chapter_11.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn say_hello(out: &mut dyn Write) -> std::io::Result<()> {
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `min`
[INFO] [stdout]   --> src/chapter_11.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn min<T: Ord>(value1: T, value2: T) -> T {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `dot`
[INFO] [stdout]    --> src/chapter_11.rs:199:4
[INFO] [stdout]     |
[INFO] [stdout] 199 | fn dot<N>(v1: &[N], v2: &[N]) -> N
[INFO] [stdout]     |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.01s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking rust_practice v0.1.0 (/tmp/fixit)
[INFO] [stdout] warning: struct is never constructed: `Extrema`
[INFO] [stdout]    --> src/chapter_9.rs:157:8
[INFO] [stdout]     |
[INFO] [stdout] 157 | struct Extrema<'elt> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `find_extrema`
[INFO] [stdout]    --> src/chapter_9.rs:162:4
[INFO] [stdout]     |
[INFO] [stdout] 162 | fn find_extrema<'s>(slice: &'s [i32]) -> Extrema<'s> {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `say_hello`
[INFO] [stdout]  --> src/chapter_11.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn say_hello(out: &mut dyn Write) -> std::io::Result<()> {
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `min`
[INFO] [stdout]   --> src/chapter_11.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn min<T: Ord>(value1: T, value2: T) -> T {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `dot`
[INFO] [stdout]    --> src/chapter_11.rs:199:4
[INFO] [stdout]     |
[INFO] [stdout] 199 | fn dot<N>(v1: &[N], v2: &[N]) -> N
[INFO] [stdout]     |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 14s
[INFO] running `Command { std: "docker" "inspect" "fd8a8c497114cb78349b3917f95bf259b0e61ffcc35ddfaa27a54a651b646b85", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd8a8c497114cb78349b3917f95bf259b0e61ffcc35ddfaa27a54a651b646b85", kill_on_drop: false }`
[INFO] [stdout] fd8a8c497114cb78349b3917f95bf259b0e61ffcc35ddfaa27a54a651b646b85