[INFO] cloning repository https://github.com/defracted/trying-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/defracted/trying-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdefracted%2Ftrying-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdefracted%2Ftrying-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 48284ccbf5d361f6787028a0661e23ee1abd555e
[INFO] checking defracted/trying-rust against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdefracted%2Ftrying-rust" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/defracted/trying-rust on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/defracted/trying-rust
[INFO] finished tweaking git repo https://github.com/defracted/trying-rust
[INFO] tweaked toml for git repo https://github.com/defracted/trying-rust written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/defracted/trying-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 924b150817643f8a228fe939c48d32516ab30b4261cf47caf8e89120abf1c756
[INFO] running `Command { std: "docker" "start" "-a" "924b150817643f8a228fe939c48d32516ab30b4261cf47caf8e89120abf1c756", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "924b150817643f8a228fe939c48d32516ab30b4261cf47caf8e89120abf1c756", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "924b150817643f8a228fe939c48d32516ab30b4261cf47caf8e89120abf1c756", kill_on_drop: false }`
[INFO] [stdout] 924b150817643f8a228fe939c48d32516ab30b4261cf47caf8e89120abf1c756
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b75c137bfd23fbd8d6bcdcd4f02941daff997c7be2dc616c4ad72f5c45e2885b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b75c137bfd23fbd8d6bcdcd4f02941daff997c7be2dc616c4ad72f5c45e2885b", kill_on_drop: false }`
[INFO] [stderr]     Checking trying-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/types.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let x = 32;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/types.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let x = 32;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/types.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let y = 2.5;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> src/types.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let z: i64 = 1000000000;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/types.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let y = 2.5;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> src/types.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let z: i64 = 1000000000;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `is_alive`
[INFO] [stdout]   --> src/types.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let is_alive = true;
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_is_alive`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `is_dev`
[INFO] [stdout]   --> src/types.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let is_dev = 1 > 0;
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_is_dev`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `is_alive`
[INFO] [stdout]   --> src/types.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let is_alive = true;
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_is_alive`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `is_dev`
[INFO] [stdout]   --> src/types.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let is_dev = 1 > 0;
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_is_dev`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/types.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let a = 'a';
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/types.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let a = 'a';
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_fizzbuzz`
[INFO] [stdout]  --> src/loops.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn test_fizzbuzz(num: i32) {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run`
[INFO] [stdout]   --> src/loops.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_fizzbuzz`
[INFO] [stdout]  --> src/loops.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn test_fizzbuzz(num: i32) {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run`
[INFO] [stdout]   --> src/loops.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `Command { std: "docker" "inspect" "b75c137bfd23fbd8d6bcdcd4f02941daff997c7be2dc616c4ad72f5c45e2885b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b75c137bfd23fbd8d6bcdcd4f02941daff997c7be2dc616c4ad72f5c45e2885b", kill_on_drop: false }`
[INFO] [stdout] b75c137bfd23fbd8d6bcdcd4f02941daff997c7be2dc616c4ad72f5c45e2885b