[INFO] cloning repository https://github.com/AndyDSM/conwayprofile-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AndyDSM/conwayprofile-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAndyDSM%2Fconwayprofile-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAndyDSM%2Fconwayprofile-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 653d292cc65ba0da8b4c5902dc6713be36c7746c
[INFO] checking AndyDSM/conwayprofile-rust against try#bb9dbf1d07454a99066eabaabd5819851281494b for pr-80920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAndyDSM%2Fconwayprofile-rust" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/AndyDSM/conwayprofile-rust on toolchain bb9dbf1d07454a99066eabaabd5819851281494b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+bb9dbf1d07454a99066eabaabd5819851281494b" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/AndyDSM/conwayprofile-rust
[INFO] finished tweaking git repo https://github.com/AndyDSM/conwayprofile-rust
[INFO] tweaked toml for git repo https://github.com/AndyDSM/conwayprofile-rust written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/AndyDSM/conwayprofile-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+bb9dbf1d07454a99066eabaabd5819851281494b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rand_core v0.2.1
[INFO] [stderr]   Downloaded rand v0.4.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+bb9dbf1d07454a99066eabaabd5819851281494b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d796ce42911f1329a241c7e6edd6a1ed616f09aab2f0dcc7db40be4b0070c0ae
[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" "d796ce42911f1329a241c7e6edd6a1ed616f09aab2f0dcc7db40be4b0070c0ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d796ce42911f1329a241c7e6edd6a1ed616f09aab2f0dcc7db40be4b0070c0ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d796ce42911f1329a241c7e6edd6a1ed616f09aab2f0dcc7db40be4b0070c0ae", kill_on_drop: false }`
[INFO] [stdout] d796ce42911f1329a241c7e6edd6a1ed616f09aab2f0dcc7db40be4b0070c0ae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+bb9dbf1d07454a99066eabaabd5819851281494b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0fd554f1b889b3b9f104634f42f193380525cdc43172cd18dd18cadac68b4d8f
[INFO] running `Command { std: "docker" "start" "-a" "0fd554f1b889b3b9f104634f42f193380525cdc43172cd18dd18cadac68b4d8f", kill_on_drop: false }`
[INFO] [stderr]     Checking rand_core v0.2.1
[INFO] [stderr]     Checking rand v0.4.3
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]     Checking rand v0.3.22
[INFO] [stderr]     Checking conwayprofile v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/lib.rs:199:58
[INFO] [stdout]     |
[INFO] [stdout] 199 |     let mut image = File::create(&filename[..]).unwrap();;
[INFO] [stdout]     |                                                          ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/lib.rs:199:58
[INFO] [stdout]     |
[INFO] [stdout] 199 |     let mut image = File::create(&filename[..]).unwrap();;
[INFO] [stdout]     |                                                          ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `wrap`
[INFO] [stdout]   --> src/lib.rs:90:43
[INFO] [stdout]    |
[INFO] [stdout] 90 |     fn board_next(&self, board: &Vec<u8>, wrap: bool) -> Vec<u8> {
[INFO] [stdout]    |                                           ^^^^ help: if this is intentional, prefix it with an underscore: `_wrap`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/lib.rs:116:13
[INFO] [stdout]     |
[INFO] [stdout] 116 |         for i in 0..max {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:119:17
[INFO] [stdout]     |
[INFO] [stdout] 119 |             let mut next_board = self.board_next(&r[last], true);
[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 variable: `wrap`
[INFO] [stdout]   --> src/lib.rs:90:43
[INFO] [stdout]    |
[INFO] [stdout] 90 |     fn board_next(&self, board: &Vec<u8>, wrap: bool) -> Vec<u8> {
[INFO] [stdout]    |                                           ^^^^ help: if this is intentional, prefix it with an underscore: `_wrap`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/lib.rs:116:13
[INFO] [stdout]     |
[INFO] [stdout] 116 |         for i in 0..max {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:119:17
[INFO] [stdout]     |
[INFO] [stdout] 119 |             let mut next_board = self.board_next(&r[last], true);
[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: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.53s
[INFO] running `Command { std: "docker" "inspect" "0fd554f1b889b3b9f104634f42f193380525cdc43172cd18dd18cadac68b4d8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0fd554f1b889b3b9f104634f42f193380525cdc43172cd18dd18cadac68b4d8f", kill_on_drop: false }`
[INFO] [stdout] 0fd554f1b889b3b9f104634f42f193380525cdc43172cd18dd18cadac68b4d8f