[INFO] cloning repository https://github.com/HongxuanG/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/HongxuanG/learn_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHongxuanG%2Flearn_rust", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHongxuanG%2Flearn_rust'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] e2af975163be982b47bb919927152030f07672f9 [INFO] checking HongxuanG/learn_rust against master#00bfd6b2734d9c28a147bf237490995731781fdd for pr-117984 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHongxuanG%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/HongxuanG/learn_rust on toolchain 00bfd6b2734d9c28a147bf237490995731781fdd [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+00bfd6b2734d9c28a147bf237490995731781fdd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/HongxuanG/learn_rust [INFO] finished tweaking git repo https://github.com/HongxuanG/learn_rust [INFO] tweaked toml for git repo https://github.com/HongxuanG/learn_rust written to /workspace/builds/worker-0-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/HongxuanG/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" "+00bfd6b2734d9c28a147bf237490995731781fdd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating git repository `https://github.com/bjz/color-rs` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded utf8_slice v1.0.0 [INFO] [stderr] Downloaded angle v0.1.55555 [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" "+00bfd6b2734d9c28a147bf237490995731781fdd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] b91753b37097bec66bb3cec9599a4abe015eb23eea2a865cf157ae81307865ce [INFO] running `Command { std: "docker" "start" "-a" "b91753b37097bec66bb3cec9599a4abe015eb23eea2a865cf157ae81307865ce", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "b91753b37097bec66bb3cec9599a4abe015eb23eea2a865cf157ae81307865ce", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b91753b37097bec66bb3cec9599a4abe015eb23eea2a865cf157ae81307865ce", kill_on_drop: false }` [INFO] [stdout] b91753b37097bec66bb3cec9599a4abe015eb23eea2a865cf157ae81307865ce [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=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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+00bfd6b2734d9c28a147bf237490995731781fdd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 273da3bd7ca503936d0f02f960a25ec5900d0018ca1810059dac9f9f6bb82cfd [INFO] running `Command { std: "docker" "start" "-a" "273da3bd7ca503936d0f02f960a25ec5900d0018ca1810059dac9f9f6bb82cfd", kill_on_drop: false }` [INFO] [stderr] Compiling num-traits v0.2.15 [INFO] [stderr] Compiling libc v0.2.139 [INFO] [stderr] Compiling num-integer v0.1.45 [INFO] [stderr] Checking rustc-serialize v0.3.24 [INFO] [stderr] Compiling num-iter v0.1.43 [INFO] [stderr] Checking utf8_slice v1.0.0 [INFO] [stderr] Checking rand v0.4.6 [INFO] [stderr] Checking rand v0.3.23 [INFO] [stderr] Checking num-bigint v0.1.44 [INFO] [stderr] Checking num-complex v0.1.43 [INFO] [stderr] Checking num-rational v0.1.42 [INFO] [stderr] Checking num v0.1.42 [INFO] [stderr] Checking angle v0.1.55555 [INFO] [stderr] Checking color v0.0.2 (https://github.com/bjz/color-rs#c39c52a4) [INFO] [stderr] Checking world_hello v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused imports: `Write`, `self` [INFO] [stdout] --> src/lib.rs:18:15 [INFO] [stdout] | [INFO] [stdout] 18 | use std::io::{self, Write}; [INFO] [stdout] | ^^^^ ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `rand::*` [INFO] [stdout] --> src/lib.rs:20:5 [INFO] [stdout] | [INFO] [stdout] 20 | use rand::*; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `Write`, `self` [INFO] [stdout] --> src/lib.rs:18:15 [INFO] [stdout] | [INFO] [stdout] 18 | use std::io::{self, Write}; [INFO] [stdout] | ^^^^ ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `rand::*` [INFO] [stdout] --> src/lib.rs:20:5 [INFO] [stdout] | [INFO] [stdout] 20 | use rand::*; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `t` [INFO] [stdout] --> src/lib.rs:90:28 [INFO] [stdout] | [INFO] [stdout] 90 | pub fn some_function(t: T, u: U) [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `u` [INFO] [stdout] --> src/lib.rs:90:34 [INFO] [stdout] | [INFO] [stdout] 90 | pub fn some_function(t: T, u: U) [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_u` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `t` [INFO] [stdout] --> src/lib.rs:90:28 [INFO] [stdout] | [INFO] [stdout] 90 | pub fn some_function(t: T, u: U) [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `u` [INFO] [stdout] --> src/lib.rs:90:34 [INFO] [stdout] | [INFO] [stdout] 90 | pub fn some_function(t: T, u: U) [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_u` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `reply` and `retweet` are never read [INFO] [stdout] --> src/lib.rs:53:5 [INFO] [stdout] | [INFO] [stdout] 50 | struct Tweet { [INFO] [stdout] | ----- fields in this struct [INFO] [stdout] ... [INFO] [stdout] 53 | reply: bool, [INFO] [stdout] | ^^^^^ [INFO] [stdout] 54 | retweet: bool, [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Pair` is never constructed [INFO] [stdout] --> src/lib.rs:98:8 [INFO] [stdout] | [INFO] [stdout] 98 | struct Pair { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> src/lib.rs:104:8 [INFO] [stdout] | [INFO] [stdout] 103 | impl Pair { [INFO] [stdout] | --------------- associated function in this implementation [INFO] [stdout] 104 | fn new(x: T, y: T) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `cmp_display` is never used [INFO] [stdout] --> src/lib.rs:110:8 [INFO] [stdout] | [INFO] [stdout] 109 | impl Pair { [INFO] [stdout] | ------------------------------------- method in this implementation [INFO] [stdout] 110 | fn cmp_display(&self) { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `finally` is never used [INFO] [stdout] --> src/break_up_mod/second_floor_break_up.rs:1:8 [INFO] [stdout] | [INFO] [stdout] 1 | pub fn finally() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `reply` and `retweet` are never read [INFO] [stdout] --> src/lib.rs:53:5 [INFO] [stdout] | [INFO] [stdout] 50 | struct Tweet { [INFO] [stdout] | ----- fields in this struct [INFO] [stdout] ... [INFO] [stdout] 53 | reply: bool, [INFO] [stdout] | ^^^^^ [INFO] [stdout] 54 | retweet: bool, [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Pair` is never constructed [INFO] [stdout] --> src/lib.rs:98:8 [INFO] [stdout] | [INFO] [stdout] 98 | struct Pair { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> src/lib.rs:104:8 [INFO] [stdout] | [INFO] [stdout] 103 | impl Pair { [INFO] [stdout] | --------------- associated function in this implementation [INFO] [stdout] 104 | fn new(x: T, y: T) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `cmp_display` is never used [INFO] [stdout] --> src/lib.rs:110:8 [INFO] [stdout] | [INFO] [stdout] 109 | impl Pair { [INFO] [stdout] | ------------------------------------- method in this implementation [INFO] [stdout] 110 | fn cmp_display(&self) { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `finally` is never used [INFO] [stdout] --> src/break_up_mod/second_floor_break_up.rs:1:8 [INFO] [stdout] | [INFO] [stdout] 1 | pub fn finally() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 9 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 9 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1.46s [INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rustc-serialize v0.3.24 [INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1` [INFO] running `Command { std: "docker" "inspect" "273da3bd7ca503936d0f02f960a25ec5900d0018ca1810059dac9f9f6bb82cfd", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "273da3bd7ca503936d0f02f960a25ec5900d0018ca1810059dac9f9f6bb82cfd", kill_on_drop: false }` [INFO] [stdout] 273da3bd7ca503936d0f02f960a25ec5900d0018ca1810059dac9f9f6bb82cfd