[INFO] cloning repository https://github.com/loonbell/rsmatrix
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/loonbell/rsmatrix" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Floonbell%2Frsmatrix", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Floonbell%2Frsmatrix'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bf84b25ba797c3132c6dca344d76eaa22890d215
[INFO] checking loonbell/rsmatrix against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Floonbell%2Frsmatrix" "/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/loonbell/rsmatrix on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/loonbell/rsmatrix
[INFO] finished tweaking git repo https://github.com/loonbell/rsmatrix
[INFO] tweaked toml for git repo https://github.com/loonbell/rsmatrix written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/loonbell/rsmatrix already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b23d543cd53c2b70440dc2dfd395eb8045919310cf104821e6ec317f4b273335
[INFO] running `Command { std: "docker" "start" "-a" "b23d543cd53c2b70440dc2dfd395eb8045919310cf104821e6ec317f4b273335", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b23d543cd53c2b70440dc2dfd395eb8045919310cf104821e6ec317f4b273335", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b23d543cd53c2b70440dc2dfd395eb8045919310cf104821e6ec317f4b273335", kill_on_drop: false }`
[INFO] [stdout] b23d543cd53c2b70440dc2dfd395eb8045919310cf104821e6ec317f4b273335
[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" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e20ea91736b14edc795a8e414acd39621f1f2276c5632e93ac7701b0bac1e411
[INFO] running `Command { std: "docker" "start" "-a" "e20ea91736b14edc795a8e414acd39621f1f2276c5632e93ac7701b0bac1e411", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]     Checking rsmatrix v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `term_size` is assigned to, but never used
[INFO] [stdout]   --> src/main.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let mut term_size: libc::winsize;
[INFO] [stdout]    |             ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]    = note: consider using `_term_size` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `term_size` is never read
[INFO] [stdout]   --> src/main.rs:35:13
[INFO] [stdout]    |
[INFO] [stdout] 35 |             term_size = check_size().expect("Can't find terminal size, aborting");
[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: unused variable: `matrix`
[INFO] [stdout]   --> src/main.rs:76:18
[INFO] [stdout]    |
[INFO] [stdout] 76 | fn update_matrix(matrix: &Vec<Option<char>>, term_size: &libc::winsize)
[INFO] [stdout]    |                  ^^^^^^ help: if this is intentional, prefix it with an underscore: `_matrix`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `term_size`
[INFO] [stdout]   --> src/main.rs:76:46
[INFO] [stdout]    |
[INFO] [stdout] 76 | fn update_matrix(matrix: &Vec<Option<char>>, term_size: &libc::winsize)
[INFO] [stdout]    |                                              ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_term_size`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `new_matrix`
[INFO] [stdout]   --> src/main.rs:67:4
[INFO] [stdout]    |
[INFO] [stdout] 67 | fn new_matrix(term_size: &libc::winsize) -> Vec<Option<char>>
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `update_matrix`
[INFO] [stdout]   --> src/main.rs:76:4
[INFO] [stdout]    |
[INFO] [stdout] 76 | fn update_matrix(matrix: &Vec<Option<char>>, term_size: &libc::winsize)
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_matrix`
[INFO] [stdout]   --> src/main.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn print_matrix()
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `term_size` is assigned to, but never used
[INFO] [stdout]   --> src/main.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let mut term_size: libc::winsize;
[INFO] [stdout]    |             ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]    = note: consider using `_term_size` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `term_size` is never read
[INFO] [stdout]   --> src/main.rs:35:13
[INFO] [stdout]    |
[INFO] [stdout] 35 |             term_size = check_size().expect("Can't find terminal size, aborting");
[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: unused variable: `matrix`
[INFO] [stdout]   --> src/main.rs:76:18
[INFO] [stdout]    |
[INFO] [stdout] 76 | fn update_matrix(matrix: &Vec<Option<char>>, term_size: &libc::winsize)
[INFO] [stdout]    |                  ^^^^^^ help: if this is intentional, prefix it with an underscore: `_matrix`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `term_size`
[INFO] [stdout]   --> src/main.rs:76:46
[INFO] [stdout]    |
[INFO] [stdout] 76 | fn update_matrix(matrix: &Vec<Option<char>>, term_size: &libc::winsize)
[INFO] [stdout]    |                                              ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_term_size`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `new_matrix`
[INFO] [stdout]   --> src/main.rs:67:4
[INFO] [stdout]    |
[INFO] [stdout] 67 | fn new_matrix(term_size: &libc::winsize) -> Vec<Option<char>>
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `update_matrix`
[INFO] [stdout]   --> src/main.rs:76:4
[INFO] [stdout]    |
[INFO] [stdout] 76 | fn update_matrix(matrix: &Vec<Option<char>>, term_size: &libc::winsize)
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_matrix`
[INFO] [stdout]   --> src/main.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn print_matrix()
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.11s
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e20ea91736b14edc795a8e414acd39621f1f2276c5632e93ac7701b0bac1e411", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e20ea91736b14edc795a8e414acd39621f1f2276c5632e93ac7701b0bac1e411", kill_on_drop: false }`
[INFO] [stdout] e20ea91736b14edc795a8e414acd39621f1f2276c5632e93ac7701b0bac1e411