[INFO] cloning repository https://github.com/zhangrxiang/hello-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zhangrxiang/hello-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzhangrxiang%2Fhello-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzhangrxiang%2Fhello-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d0876e91ac62d0bba57b2411e254c32796b52c1c
[INFO] checking zhangrxiang/hello-rust against try#ddfd70ee3c3748e597b32f416b0d15a4f6e37685 for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzhangrxiang%2Fhello-rust" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zhangrxiang/hello-rust on toolchain ddfd70ee3c3748e597b32f416b0d15a4f6e37685
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/zhangrxiang/hello-rust
[INFO] removed 0 missing examples
[INFO] finished tweaking git repo https://github.com/zhangrxiang/hello-rust
[INFO] tweaked toml for git repo https://github.com/zhangrxiang/hello-rust written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/zhangrxiang/hello-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ioctl-rs v0.1.6
[INFO] [stderr]   Downloaded pin-project-internal v0.4.16
[INFO] [stderr]   Downloaded tokio-stream v0.1.7
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[INFO] [stderr]   Downloaded serial-unix v0.4.0
[INFO] [stderr]   Downloaded serial-windows v0.4.0
[INFO] [stderr]   Downloaded ntapi v0.3.4
[INFO] [stderr]   Downloaded termios v0.2.2
[INFO] [stderr]   Downloaded backtrace-sys v0.1.37
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[INFO] [stderr]   Downloaded libsqlite3-sys v0.17.3
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[INFO] [stderr]   Downloaded quote v1.0.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 778d0c9cdb649f81fdd0b9d74973d9b3fbd5617440428a7c159f70edf8cb90a0
[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" "778d0c9cdb649f81fdd0b9d74973d9b3fbd5617440428a7c159f70edf8cb90a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "778d0c9cdb649f81fdd0b9d74973d9b3fbd5617440428a7c159f70edf8cb90a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "778d0c9cdb649f81fdd0b9d74973d9b3fbd5617440428a7c159f70edf8cb90a0", kill_on_drop: false }`
[INFO] [stdout] 778d0c9cdb649f81fdd0b9d74973d9b3fbd5617440428a7c159f70edf8cb90a0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 54d8fdf79d18c645867f17eb33f242b12f83fa591e7cd94b0b052627d3344ad2
[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" "54d8fdf79d18c645867f17eb33f242b12f83fa591e7cd94b0b052627d3344ad2", kill_on_drop: false }`
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[INFO] [stderr]     Checking brotli2 v0.3.2
[INFO] [stderr]    Compiling synstructure v0.12.3
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[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling derive_more v0.99.5
[INFO] [stderr]    Compiling actix-macros v0.1.1
[INFO] [stderr]    Compiling async-trait v0.1.30
[INFO] [stderr]    Compiling enum-as-inner v0.3.2
[INFO] [stderr]    Compiling diesel_derives v1.4.1
[INFO] [stderr]    Compiling actix-web-codegen v0.2.1
[INFO] [stderr]    Compiling tracing-attributes v0.1.15
[INFO] [stderr]    Compiling pin-project-internal v1.0.7
[INFO] [stderr]    Compiling tokio-macros v1.3.0
[INFO] [stderr]    Compiling structopt-derive v0.4.15
[INFO] [stderr]    Compiling async-stream-impl v0.3.2
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[INFO] [stderr]     Checking tracing v0.1.26
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[INFO] [stderr]     Checking pin-project v1.0.7
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[INFO] [stderr]     Checking pin-project v0.4.16
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking actix-threadpool v0.3.1
[INFO] [stderr]     Checking diesel v1.4.4
[INFO] [stderr]     Checking tokio-stream v0.1.7
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[INFO] [stderr]     Checking actix-service v1.0.5
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[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking trust-dns-proto v0.18.0-alpha.2
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[INFO] [stderr]     Checking actix-server v1.0.2
[INFO] [stderr]     Checking actix-tls v1.0.0
[INFO] [stderr]     Checking actix-testing v1.0.0
[INFO] [stderr]     Checking trust-dns-resolver v0.18.0-alpha.2
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking actix-router v0.2.4
[INFO] [stderr]     Checking tracing-serde v0.1.2
[INFO] [stderr]     Checking actix-connect v1.0.2
[INFO] [stderr]     Checking actix-http v1.0.1
[INFO] [stderr]     Checking tracing-subscriber v0.2.15
[INFO] [stderr]     Checking serde_json v0.1.0 (/opt/rustwide/workdir/crates/serde_json)
[INFO] [stdout] warning: unused imports: `Result`, `Value`
[INFO] [stdout]  --> crates/serde_json/src/main.rs:1:18
[INFO] [stdout]   |
[INFO] [stdout] 1 | use serde_json::{Result, Value};
[INFO] [stdout]   |                  ^^^^^^  ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking mini-redis v0.4.0
[INFO] [stderr]     Checking diesel_demo_step_1_sqlite v0.1.0 (/opt/rustwide/workdir/demo/diesel/sqlite/getting_started_step_1)
[INFO] [stderr]     Checking spawning v0.1.0 (/opt/rustwide/workdir/demo/my-mini-redis/spawning)
[INFO] [stderr]     Checking shared-state v0.1.0 (/opt/rustwide/workdir/demo/my-mini-redis/shared-state)
[INFO] [stderr]     Checking quickstart v0.1.0 (/opt/rustwide/workdir/crates/tokio/quickstart)
[INFO] [stderr]     Checking my-redis v0.1.0 (/opt/rustwide/workdir/demo/my-mini-redis/tokio)
[INFO] [stderr]     Checking awc v1.0.1
[INFO] [stderr]     Checking actix-web v2.0.0
[INFO] [stderr]     Checking hello-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `BufWriter`
[INFO] [stdout]  --> examples/uart.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::{BufWriter, Cursor, Write};
[INFO] [stdout]   |               ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `getchar`
[INFO] [stdout]  --> examples/c.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |         fn getchar() -> c_int;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]  --> examples/uart.rs:5:34
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::{BufWriter, Cursor, Write};
[INFO] [stdout]   |                                  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> examples/uart.rs:38:25
[INFO] [stdout]    |
[INFO] [stdout] 38 |                     let mut i2 = rdr.read_i32::<BigEndian>().unwrap() as usize;
[INFO] [stdout]    |                         ----^^
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Cursor`
[INFO] [stdout]  --> examples/byteorder.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::Cursor;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BigEndian`, `ReadBytesExt`, `WriteBytesExt`
[INFO] [stdout]  --> examples/byteorder.rs:4:17
[INFO] [stdout]   |
[INFO] [stdout] 4 | use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt};
[INFO] [stdout]   |                 ^^^^^^^^^  ^^^^^^^^^^^^  ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `visit_dirs`
[INFO] [stdout]   --> examples/ls/main.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn visit_dirs(dir: &Path, cb: &dyn Fn(&DirEntry)) -> io::Result<()> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `query`
[INFO] [stdout]   --> examples/command.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     query: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> examples/tcp.rs:10:13
[INFO] [stdout]    |
[INFO] [stdout] 10 |             stream.write(&data);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> examples/ls/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     visit_dir(path.as_path());
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `address`
[INFO] [stdout]  --> examples/relay/client.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     address: u8,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `FUNC_READ_STATUS`
[INFO] [stdout]   --> examples/relay/client.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | const FUNC_READ_STATUS: u8 = 0x10;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `status`
[INFO] [stdout]   --> examples/relay/client.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn status(&mut self) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3m 58s
[INFO] running `Command { std: "docker" "inspect" "54d8fdf79d18c645867f17eb33f242b12f83fa591e7cd94b0b052627d3344ad2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54d8fdf79d18c645867f17eb33f242b12f83fa591e7cd94b0b052627d3344ad2", kill_on_drop: false }`
[INFO] [stdout] 54d8fdf79d18c645867f17eb33f242b12f83fa591e7cd94b0b052627d3344ad2