[INFO] cloning repository https://github.com/H0wAway/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/H0wAway/rust-learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FH0wAway%2Frust-learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FH0wAway%2Frust-learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0506aad8cde5b036ce8e45a13047bb05e56c2fac
[INFO] checking H0wAway/rust-learning against try#969026c535f4240ff7866ef11207dfda18a26af6 for pr-146504
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FH0wAway%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] started tweaking git repo https://github.com/H0wAway/rust-learning
[INFO] finished tweaking git repo https://github.com/H0wAway/rust-learning
[INFO] tweaked toml for git repo https://github.com/H0wAway/rust-learning written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/H0wAway/rust-learning on toolchain 969026c535f4240ff7866ef11207dfda18a26af6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+969026c535f4240ff7866ef11207dfda18a26af6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/H0wAway/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" "+969026c535f4240ff7866ef11207dfda18a26af6" "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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+969026c535f4240ff7866ef11207dfda18a26af6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bdd743ac5c10e0767796155944ce731a3bf7b5cae37d51ef8f4f77149c80f15b
[INFO] running `Command { std: "docker" "start" "-a" "bdd743ac5c10e0767796155944ce731a3bf7b5cae37d51ef8f4f77149c80f15b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bdd743ac5c10e0767796155944ce731a3bf7b5cae37d51ef8f4f77149c80f15b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bdd743ac5c10e0767796155944ce731a3bf7b5cae37d51ef8f4f77149c80f15b", kill_on_drop: false }`
[INFO] [stdout] bdd743ac5c10e0767796155944ce731a3bf7b5cae37d51ef8f4f77149c80f15b
[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=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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+969026c535f4240ff7866ef11207dfda18a26af6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9ed3ea8f8e8893688440a732fa5909cf09d85d046d1911f9aaea462396c0c601
[INFO] running `Command { std: "docker" "start" "-a" "9ed3ea8f8e8893688440a732fa5909cf09d85d046d1911f9aaea462396c0c601", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `b` is never read
[INFO] [stdout]   --> src/basic/variable.rs:10:22
[INFO] [stdout]    |
[INFO] [stdout] 10 |         let (_a, mut b): (bool, bool) = (true, false);
[INFO] [stdout]    |                      ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `e` is assigned to, but never used
[INFO] [stdout]   --> src/basic/variable.rs:16:26
[INFO] [stdout]    |
[INFO] [stdout] 16 |         let (a, b, c, d, e): (i32, i32, i32, i32, i32);
[INFO] [stdout]    |                          ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_e` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `e` is never read
[INFO] [stdout]   --> src/basic/variable.rs:19:20
[INFO] [stdout]    |
[INFO] [stdout] 19 |         [c, .., d, e] = [1, 2, 3, 4, 5, 6, 7, 8, 9];
[INFO] [stdout]    |                    ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `b` is never read
[INFO] [stdout]   --> src/basic/variable.rs:10:22
[INFO] [stdout]    |
[INFO] [stdout] 10 |         let (_a, mut b): (bool, bool) = (true, false);
[INFO] [stdout]    |                      ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `e` is assigned to, but never used
[INFO] [stdout]   --> src/basic/variable.rs:16:26
[INFO] [stdout]    |
[INFO] [stdout] 16 |         let (a, b, c, d, e): (i32, i32, i32, i32, i32);
[INFO] [stdout]    |                          ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_e` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `e` is never read
[INFO] [stdout]   --> src/basic/variable.rs:19:20
[INFO] [stdout]    |
[INFO] [stdout] 19 |         [c, .., d, e] = [1, 2, 3, 4, 5, 6, 7, 8, 9];
[INFO] [stdout]    |                    ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `variable_binding` is never used
[INFO] [stdout]  --> src/basic/variable.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 |     pub fn variable_binding() {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `deconstructive_assignment` is never used
[INFO] [stdout]   --> src/basic/variable.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn deconstructive_assignment() {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `variable_shadowing` is never used
[INFO] [stdout]   --> src/basic/variable.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn variable_shadowing() {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `integer_overflow` is never used
[INFO] [stdout]  --> src/basic/base_type/numbers.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn integer_overflow() {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bitwise_operation` is never used
[INFO] [stdout]   --> src/basic/base_type/numbers.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn bitwise_operation() {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example` is never used
[INFO] [stdout]   --> src/basic/base_type/numbers.rs:65:12
[INFO] [stdout]    |
[INFO] [stdout] 65 |     pub fn example() -> () {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example` is never used
[INFO] [stdout]  --> src/basic/base_type/function.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 |     fn example(x: i32, y: i32) -> i32 {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `diverging_function` is never used
[INFO] [stdout]   --> src/basic/base_type/function.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn diverging_function() -> ! {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MAX_POINTS` is never used
[INFO] [stdout]  --> src/basic/variable.rs:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 |         const MAX_POINTS: u32 = 100_000;
[INFO] [stdout]   |               ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bitwise_operation` is never used
[INFO] [stdout]   --> src/basic/base_type/numbers.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn bitwise_operation() {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example` is never used
[INFO] [stdout]  --> src/basic/base_type/function.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 |     fn example(x: i32, y: i32) -> i32 {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `diverging_function` is never used
[INFO] [stdout]   --> src/basic/base_type/function.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn diverging_function() -> ! {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] running `Command { std: "docker" "inspect" "9ed3ea8f8e8893688440a732fa5909cf09d85d046d1911f9aaea462396c0c601", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ed3ea8f8e8893688440a732fa5909cf09d85d046d1911f9aaea462396c0c601", kill_on_drop: false }`
[INFO] [stdout] 9ed3ea8f8e8893688440a732fa5909cf09d85d046d1911f9aaea462396c0c601