[INFO] cloning repository https://github.com/glgraca/connect4
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/glgraca/connect4" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fglgraca%2Fconnect4", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fglgraca%2Fconnect4'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ce8e63118a9ae2d4d1623815c2dfd9fd3edcd9e3
[INFO] checking glgraca/connect4 against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fglgraca%2Fconnect4" "/workspace/builds/worker-33/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-33/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/glgraca/connect4 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/glgraca/connect4
[INFO] finished tweaking git repo https://github.com/glgraca/connect4
[INFO] tweaked toml for git repo https://github.com/glgraca/connect4 written to /workspace/builds/worker-33/source/Cargo.toml
[INFO] crate git repo https://github.com/glgraca/connect4 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-33/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/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] 6d28d24db6d6ae3ff9b55d02ca61a3282f048173133f8ca943576d88c2423265
[INFO] running `Command { std: "docker" "start" "-a" "6d28d24db6d6ae3ff9b55d02ca61a3282f048173133f8ca943576d88c2423265", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6d28d24db6d6ae3ff9b55d02ca61a3282f048173133f8ca943576d88c2423265", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d28d24db6d6ae3ff9b55d02ca61a3282f048173133f8ca943576d88c2423265", kill_on_drop: false }`
[INFO] [stdout] 6d28d24db6d6ae3ff9b55d02ca61a3282f048173133f8ca943576d88c2423265
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/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] af737ac758d1eb04d6042a02c3fa5335c58423aecf9b1b64f7e1e43c37375992
[INFO] running `Command { std: "docker" "start" "-a" "af737ac758d1eb04d6042a02c3fa5335c58423aecf9b1b64f7e1e43c37375992", 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 libc v0.2.81
[INFO] [stderr]    Compiling getrandom v0.2.1
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking rand_core v0.6.1
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking rand v0.8.1
[INFO] [stderr]     Checking connect4 v0.1.0 (/tmp/fixit)
[INFO] [stderr]    Migrating src/main.rs from 2018 edition to 2021
[INFO] [stderr]        Fixed src/robot.rs (2 fixes)
[INFO] [stdout] warning: value assigned to `winner` is never read
[INFO] [stdout]   --> src/main.rs:22:10
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let mut winner=' ';
[INFO] [stdout]    |             ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `s` is never read
[INFO] [stdout]   --> src/human.rs:27:11
[INFO] [stdout]    |
[INFO] [stdout] 27 |         let mut s=String::new();
[INFO] [stdout]    |                 ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `col` is never read
[INFO] [stdout]   --> src/human.rs:28:11
[INFO] [stdout]    |
[INFO] [stdout] 28 |         let mut col:i32=0;
[INFO] [stdout]    |                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `winner` is never read
[INFO] [stdout]   --> src/main.rs:22:10
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let mut winner=' ';
[INFO] [stdout]    |             ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `s` is never read
[INFO] [stdout]   --> src/human.rs:27:11
[INFO] [stdout]    |
[INFO] [stdout] 27 |         let mut s=String::new();
[INFO] [stdout]    |                 ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `col` is never read
[INFO] [stdout]   --> src/human.rs:28:11
[INFO] [stdout]    |
[INFO] [stdout] 28 |         let mut col:i32=0;
[INFO] [stdout]    |                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_full`
[INFO] [stdout]   --> src/board.rs:79:9
[INFO] [stdout]    |
[INFO] [stdout] 79 |     pub fn is_full(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_full`
[INFO] [stdout]   --> src/board.rs:79:9
[INFO] [stdout]    |
[INFO] [stdout] 79 |     pub fn is_full(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/robot.rs:103:4
[INFO] [stdout]     |
[INFO] [stdout] 103 |             stdin().read_line(&mut s);
[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]    --> src/robot.rs:103:4
[INFO] [stdout]     |
[INFO] [stdout] 103 |             stdin().read_line(&mut s);
[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: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.82s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]     Checking connect4 v0.1.0 (/tmp/fixit)
[INFO] [stdout] warning: value assigned to `winner` is never read
[INFO] [stdout]   --> src/main.rs:22:10
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let mut winner=' ';
[INFO] [stdout]    |             ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `s` is never read
[INFO] [stdout]   --> src/human.rs:27:11
[INFO] [stdout]    |
[INFO] [stdout] 27 |         let mut s=String::new();
[INFO] [stdout]    |                 ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `col` is never read
[INFO] [stdout]   --> src/human.rs:28:11
[INFO] [stdout]    |
[INFO] [stdout] 28 |         let mut col:i32=0;
[INFO] [stdout]    |                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `winner` is never read
[INFO] [stdout]   --> src/main.rs:22:10
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let mut winner=' ';
[INFO] [stdout]    |             ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `s` is never read
[INFO] [stdout]   --> src/human.rs:27:11
[INFO] [stdout]    |
[INFO] [stdout] 27 |         let mut s=String::new();
[INFO] [stdout]    |                 ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `col` is never read
[INFO] [stdout]   --> src/human.rs:28:11
[INFO] [stdout]    |
[INFO] [stdout] 28 |         let mut col:i32=0;
[INFO] [stdout]    |                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_full`
[INFO] [stdout]   --> src/board.rs:79:9
[INFO] [stdout]    |
[INFO] [stdout] 79 |     pub fn is_full(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_full`
[INFO] [stdout]   --> src/board.rs:79:9
[INFO] [stdout]    |
[INFO] [stdout] 79 |     pub fn is_full(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/robot.rs:103:4
[INFO] [stdout]     |
[INFO] [stdout] 103 |             stdin().read_line(&mut s);
[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]    --> src/robot.rs:103:4
[INFO] [stdout]     |
[INFO] [stdout] 103 |             stdin().read_line(&mut s);
[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: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.86s
[INFO] running `Command { std: "docker" "inspect" "af737ac758d1eb04d6042a02c3fa5335c58423aecf9b1b64f7e1e43c37375992", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af737ac758d1eb04d6042a02c3fa5335c58423aecf9b1b64f7e1e43c37375992", kill_on_drop: false }`
[INFO] [stdout] af737ac758d1eb04d6042a02c3fa5335c58423aecf9b1b64f7e1e43c37375992