[INFO] cloning repository https://github.com/MorRutPlz/muffinbot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MorRutPlz/muffinbot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMorRutPlz%2Fmuffinbot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMorRutPlz%2Fmuffinbot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1777e16858777a522527619717e6cd4d1d7de7ce
[INFO] checking MorRutPlz/muffinbot against try#6757d700f93f6d16c8b39cf79e96b019bd570e7d for pr-155299-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMorRutPlz%2Fmuffinbot" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/MorRutPlz/muffinbot
[INFO] finished tweaking git repo https://github.com/MorRutPlz/muffinbot
[INFO] tweaked toml for git repo https://github.com/MorRutPlz/muffinbot written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/MorRutPlz/muffinbot on toolchain 6757d700f93f6d16c8b39cf79e96b019bd570e7d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6757d700f93f6d16c8b39cf79e96b019bd570e7d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/MorRutPlz/muffinbot already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6757d700f93f6d16c8b39cf79e96b019bd570e7d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+6757d700f93f6d16c8b39cf79e96b019bd570e7d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6cd23dbf7ae61e43c5b942c33ebbdd5b7f0b74d89175d281f29e900fafe7fc5d
[INFO] running `Command { std: "docker" "start" "-a" "6cd23dbf7ae61e43c5b942c33ebbdd5b7f0b74d89175d281f29e900fafe7fc5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6cd23dbf7ae61e43c5b942c33ebbdd5b7f0b74d89175d281f29e900fafe7fc5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cd23dbf7ae61e43c5b942c33ebbdd5b7f0b74d89175d281f29e900fafe7fc5d", kill_on_drop: false }`
[INFO] [stdout] 6cd23dbf7ae61e43c5b942c33ebbdd5b7f0b74d89175d281f29e900fafe7fc5d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+6757d700f93f6d16c8b39cf79e96b019bd570e7d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d73ea7979c4f17e30491313339d0e66f728c17327d894202b4767dc09b895bbc
[INFO] running `Command { std: "docker" "start" "-a" "d73ea7979c4f17e30491313339d0e66f728c17327d894202b4767dc09b895bbc", kill_on_drop: false }`
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[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/main.rs:163:25
[INFO] [stdout]     |
[INFO] [stdout] 163 |                         drop(rate_limit);
[INFO] [stdout]     |                         ^^^^^----------^
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              argument has type `&mut HashMap<UserId, usize>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 163 -                         drop(rate_limit);
[INFO] [stdout] 163 +                         let _ = rate_limit;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/main.rs:194:25
[INFO] [stdout]     |
[INFO] [stdout] 194 |                         drop(rate_limit);
[INFO] [stdout]     |                         ^^^^^----------^
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              argument has type `&mut HashMap<UserId, usize>`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 194 -                         drop(rate_limit);
[INFO] [stdout] 194 +                         let _ = rate_limit;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/main.rs:293:25
[INFO] [stdout]     |
[INFO] [stdout] 293 |                         drop(rate_limit);
[INFO] [stdout]     |                         ^^^^^----------^
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              argument has type `&mut HashMap<UserId, usize>`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 293 -                         drop(rate_limit);
[INFO] [stdout] 293 +                         let _ = rate_limit;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/main.rs:326:25
[INFO] [stdout]     |
[INFO] [stdout] 326 |                         drop(rate_limit);
[INFO] [stdout]     |                         ^^^^^----------^
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              argument has type `&mut HashMap<UserId, usize>`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 326 -                         drop(rate_limit);
[INFO] [stdout] 326 +                         let _ = rate_limit;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/main.rs:163:25
[INFO] [stdout]     |
[INFO] [stdout] 163 |                         drop(rate_limit);
[INFO] [stdout]     |                         ^^^^^----------^
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              argument has type `&mut HashMap<UserId, usize>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 163 -                         drop(rate_limit);
[INFO] [stdout] 163 +                         let _ = rate_limit;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/main.rs:194:25
[INFO] [stdout]     |
[INFO] [stdout] 194 |                         drop(rate_limit);
[INFO] [stdout]     |                         ^^^^^----------^
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              argument has type `&mut HashMap<UserId, usize>`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 194 -                         drop(rate_limit);
[INFO] [stdout] 194 +                         let _ = rate_limit;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/main.rs:293:25
[INFO] [stdout]     |
[INFO] [stdout] 293 |                         drop(rate_limit);
[INFO] [stdout]     |                         ^^^^^----------^
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              argument has type `&mut HashMap<UserId, usize>`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 293 -                         drop(rate_limit);
[INFO] [stdout] 293 +                         let _ = rate_limit;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/main.rs:326:25
[INFO] [stdout]     |
[INFO] [stdout] 326 |                         drop(rate_limit);
[INFO] [stdout]     |                         ^^^^^----------^
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              argument has type `&mut HashMap<UserId, usize>`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 326 -                         drop(rate_limit);
[INFO] [stdout] 326 +                         let _ = rate_limit;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 39.26s
[INFO] running `Command { std: "docker" "inspect" "d73ea7979c4f17e30491313339d0e66f728c17327d894202b4767dc09b895bbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d73ea7979c4f17e30491313339d0e66f728c17327d894202b4767dc09b895bbc", kill_on_drop: false }`
[INFO] [stdout] d73ea7979c4f17e30491313339d0e66f728c17327d894202b4767dc09b895bbc
