[INFO] cloning repository https://github.com/dkeriazisStuy/Connect4Manager
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dkeriazisStuy/Connect4Manager" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FdkeriazisStuy%2FConnect4Manager", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FdkeriazisStuy%2FConnect4Manager'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ab85dbb24b2d93d74acc7abcf588ba3b587dcc6f
[INFO] checking dkeriazisStuy/Connect4Manager against master#af3c6e733a40e671550e0f0f5aeecaa13772ba56 for pr-74989
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FdkeriazisStuy%2FConnect4Manager" "/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/dkeriazisStuy/Connect4Manager on toolchain af3c6e733a40e671550e0f0f5aeecaa13772ba56
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+af3c6e733a40e671550e0f0f5aeecaa13772ba56" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dkeriazisStuy/Connect4Manager
[INFO] finished tweaking git repo https://github.com/dkeriazisStuy/Connect4Manager
[INFO] tweaked toml for git repo https://github.com/dkeriazisStuy/Connect4Manager written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/dkeriazisStuy/Connect4Manager already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+af3c6e733a40e671550e0f0f5aeecaa13772ba56" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+af3c6e733a40e671550e0f0f5aeecaa13772ba56" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4b5778beed39f8e32cd250a50ced9a49d8b00b8e4910be813d832edfb376e918
[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" "4b5778beed39f8e32cd250a50ced9a49d8b00b8e4910be813d832edfb376e918", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4b5778beed39f8e32cd250a50ced9a49d8b00b8e4910be813d832edfb376e918", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b5778beed39f8e32cd250a50ced9a49d8b00b8e4910be813d832edfb376e918", kill_on_drop: false }`
[INFO] [stdout] 4b5778beed39f8e32cd250a50ced9a49d8b00b8e4910be813d832edfb376e918
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+af3c6e733a40e671550e0f0f5aeecaa13772ba56" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 55871a04cc788291207880d029a74fb37a7b7694a1fdb84904fd611f6e8bde62
[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" "55871a04cc788291207880d029a74fb37a7b7694a1fdb84904fd611f6e8bde62", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.47
[INFO] [stderr]    Compiling cc v1.0.28
[INFO] [stderr]    Compiling rand v0.6.4
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.1
[INFO] [stderr]    Compiling ncurses v5.98.0
[INFO] [stderr]     Checking rand_os v0.1.1
[INFO] [stderr]     Checking battle_bots v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::str`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::str;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::str;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/main.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let s = thread::spawn(move || {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0597]: `cmd` does not live long enough
[INFO] [stdout]   --> src/main.rs:53:17
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let (tx, rx) = mpsc::channel();
[INFO] [stdout]    |          -- lifetime `'1` appears in the type of `tx`
[INFO] [stdout] ...
[INFO] [stdout] 53 |         tx.send(&mut cmd).unwrap();
[INFO] [stdout]    |         --------^^^^^^^^-
[INFO] [stdout]    |         |       |
[INFO] [stdout]    |         |       borrowed value does not live long enough
[INFO] [stdout]    |         argument requires that `cmd` is borrowed for `'1`
[INFO] [stdout] ...
[INFO] [stdout] 56 |     });
[INFO] [stdout]    |     - `cmd` dropped here while still borrowed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `cmd` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let (tx, rx) = mpsc::channel();
[INFO] [stdout]    |          -- lifetime `'1` appears in the type of `tx`
[INFO] [stdout] ...
[INFO] [stdout] 53 |         tx.send(&mut cmd).unwrap();
[INFO] [stdout]    |         -----------------
[INFO] [stdout]    |         |       |
[INFO] [stdout]    |         |       first mutable borrow occurs here
[INFO] [stdout]    |         argument requires that `cmd` is borrowed for `'1`
[INFO] [stdout] 54 |         cmd.wait();
[INFO] [stdout]    |         ^^^ second mutable borrow occurs here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `cmd` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:55:17
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let (tx, rx) = mpsc::channel();
[INFO] [stdout]    |          -- lifetime `'1` appears in the type of `tx`
[INFO] [stdout] ...
[INFO] [stdout] 53 |         tx.send(&mut cmd).unwrap();
[INFO] [stdout]    |         -----------------
[INFO] [stdout]    |         |       |
[INFO] [stdout]    |         |       first mutable borrow occurs here
[INFO] [stdout]    |         argument requires that `cmd` is borrowed for `'1`
[INFO] [stdout] 54 |         cmd.wait();
[INFO] [stdout] 55 |         tx.send(&mut cmd).unwrap();
[INFO] [stdout]    |                 ^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 57 |     let mut child = rx.recv().unwrap();
[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] error: aborting due to 3 previous errors; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0499, E0597.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0499`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `battle_bots`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/main.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let s = thread::spawn(move || {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0597]: `cmd` does not live long enough
[INFO] [stdout]   --> src/main.rs:53:17
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let (tx, rx) = mpsc::channel();
[INFO] [stdout]    |          -- lifetime `'1` appears in the type of `tx`
[INFO] [stdout] ...
[INFO] [stdout] 53 |         tx.send(&mut cmd).unwrap();
[INFO] [stdout]    |         --------^^^^^^^^-
[INFO] [stdout]    |         |       |
[INFO] [stdout]    |         |       borrowed value does not live long enough
[INFO] [stdout]    |         argument requires that `cmd` is borrowed for `'1`
[INFO] [stdout] ...
[INFO] [stdout] 56 |     });
[INFO] [stdout]    |     - `cmd` dropped here while still borrowed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `cmd` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let (tx, rx) = mpsc::channel();
[INFO] [stdout]    |          -- lifetime `'1` appears in the type of `tx`
[INFO] [stdout] ...
[INFO] [stdout] 53 |         tx.send(&mut cmd).unwrap();
[INFO] [stdout]    |         -----------------
[INFO] [stdout]    |         |       |
[INFO] [stdout]    |         |       first mutable borrow occurs here
[INFO] [stdout]    |         argument requires that `cmd` is borrowed for `'1`
[INFO] [stdout] 54 |         cmd.wait();
[INFO] [stdout]    |         ^^^ second mutable borrow occurs here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `cmd` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:55:17
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let (tx, rx) = mpsc::channel();
[INFO] [stdout]    |          -- lifetime `'1` appears in the type of `tx`
[INFO] [stdout] ...
[INFO] [stdout] 53 |         tx.send(&mut cmd).unwrap();
[INFO] [stdout]    |         -----------------
[INFO] [stdout]    |         |       |
[INFO] [stdout]    |         |       first mutable borrow occurs here
[INFO] [stdout]    |         argument requires that `cmd` is borrowed for `'1`
[INFO] [stdout] 54 |         cmd.wait();
[INFO] [stdout] 55 |         tx.send(&mut cmd).unwrap();
[INFO] [stdout]    |                 ^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 57 |     let mut child = rx.recv().unwrap();
[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] error: aborting due to 3 previous errors; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0499, E0597.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0499`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "55871a04cc788291207880d029a74fb37a7b7694a1fdb84904fd611f6e8bde62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55871a04cc788291207880d029a74fb37a7b7694a1fdb84904fd611f6e8bde62", kill_on_drop: false }`
[INFO] [stdout] 55871a04cc788291207880d029a74fb37a7b7694a1fdb84904fd611f6e8bde62
