[INFO] cloning repository https://github.com/mpdrescher/latex-preprocessor
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mpdrescher/latex-preprocessor" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmpdrescher%2Flatex-preprocessor", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmpdrescher%2Flatex-preprocessor'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 36a31eea87ed73b30434a1526a5f39ddf41f47e7
[INFO] checking mpdrescher/latex-preprocessor against master#0d37dca25a51fb900a402c94c8818ad1c2789e30 for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmpdrescher%2Flatex-preprocessor" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mpdrescher/latex-preprocessor on toolchain 0d37dca25a51fb900a402c94c8818ad1c2789e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mpdrescher/latex-preprocessor
[INFO] finished tweaking git repo https://github.com/mpdrescher/latex-preprocessor
[INFO] tweaked toml for git repo https://github.com/mpdrescher/latex-preprocessor written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/mpdrescher/latex-preprocessor already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ceb1676adf3e4cd07cc62354f2c5e7e0d5d8b44879e7f0d8abc6eff86376e0ea
[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" "ceb1676adf3e4cd07cc62354f2c5e7e0d5d8b44879e7f0d8abc6eff86376e0ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ceb1676adf3e4cd07cc62354f2c5e7e0d5d8b44879e7f0d8abc6eff86376e0ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ceb1676adf3e4cd07cc62354f2c5e7e0d5d8b44879e7f0d8abc6eff86376e0ea", kill_on_drop: false }`
[INFO] [stdout] ceb1676adf3e4cd07cc62354f2c5e7e0d5d8b44879e7f0d8abc6eff86376e0ea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 35a9d51b49d1d1d331158bb6bd99431a5d3a38ce70bffaaf43f2f552ede164b3
[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" "35a9d51b49d1d1d331158bb6bd99431a5d3a38ce70bffaaf43f2f552ede164b3", kill_on_drop: false }`
[INFO] [stderr]     Checking latex-preprocessor v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]    --> src/main.rs:181:44
[INFO] [stdout]     |
[INFO] [stdout] 181 |       string.into_iter().fold(String::new(), (|mut acc, x| {
[INFO] [stdout]     |  ____________________________________________^
[INFO] [stdout] 182 | |         acc.push_str(prefix);
[INFO] [stdout] 183 | |         acc.push_str(&x);
[INFO] [stdout] 184 | |         acc.push_str(suffix); 
[INFO] [stdout] 185 | |         acc
[INFO] [stdout] 186 | |     }))
[INFO] [stdout]     | |______^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 181 |     string.into_iter().fold(String::new(), |mut acc, x| {
[INFO] [stdout] 182 |         acc.push_str(prefix);
[INFO] [stdout] 183 |         acc.push_str(&x);
[INFO] [stdout] 184 |         acc.push_str(suffix); 
[INFO] [stdout] 185 |         acc
[INFO] [stdout] 186 |     })
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]    --> src/main.rs:181:44
[INFO] [stdout]     |
[INFO] [stdout] 181 |       string.into_iter().fold(String::new(), (|mut acc, x| {
[INFO] [stdout]     |  ____________________________________________^
[INFO] [stdout] 182 | |         acc.push_str(prefix);
[INFO] [stdout] 183 | |         acc.push_str(&x);
[INFO] [stdout] 184 | |         acc.push_str(suffix); 
[INFO] [stdout] 185 | |         acc
[INFO] [stdout] 186 | |     }))
[INFO] [stdout]     | |______^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 181 |     string.into_iter().fold(String::new(), |mut acc, x| {
[INFO] [stdout] 182 |         acc.push_str(prefix);
[INFO] [stdout] 183 |         acc.push_str(&x);
[INFO] [stdout] 184 |         acc.push_str(suffix); 
[INFO] [stdout] 185 |         acc
[INFO] [stdout] 186 |     })
[INFO] [stdout]     |
[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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `Command { std: "docker" "inspect" "35a9d51b49d1d1d331158bb6bd99431a5d3a38ce70bffaaf43f2f552ede164b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35a9d51b49d1d1d331158bb6bd99431a5d3a38ce70bffaaf43f2f552ede164b3", kill_on_drop: false }`
[INFO] [stdout] 35a9d51b49d1d1d331158bb6bd99431a5d3a38ce70bffaaf43f2f552ede164b3