[INFO] fetching crate trivial-argument-parser 0.1.0...
[INFO] checking trivial-argument-parser-0.1.0 against try#b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b for pr-82781
[INFO] extracting crate trivial-argument-parser 0.1.0 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate trivial-argument-parser 0.1.0 on toolchain b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate trivial-argument-parser 0.1.0
[INFO] finished tweaking crates.io crate trivial-argument-parser 0.1.0
[INFO] tweaked toml for crates.io crate trivial-argument-parser 0.1.0 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8e90d5464c3be6e80c51e0f0a8ae5242eab1a582a5fc9a2735ec3ed185bfd88d
[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" "8e90d5464c3be6e80c51e0f0a8ae5242eab1a582a5fc9a2735ec3ed185bfd88d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8e90d5464c3be6e80c51e0f0a8ae5242eab1a582a5fc9a2735ec3ed185bfd88d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e90d5464c3be6e80c51e0f0a8ae5242eab1a582a5fc9a2735ec3ed185bfd88d", kill_on_drop: false }`
[INFO] [stdout] 8e90d5464c3be6e80c51e0f0a8ae5242eab1a582a5fc9a2735ec3ed185bfd88d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 570740ba649d51db1219f7268b2a56150b45db3f9c9d10971189a7e9f870c3a3
[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" "570740ba649d51db1219f7268b2a56150b45db3f9c9d10971189a7e9f870c3a3", kill_on_drop: false }`
[INFO] [stderr]     Checking trivial-argument-parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `chars`
[INFO] [stdout]    --> src/lib.rs:244:21
[INFO] [stdout]     |
[INFO] [stdout] 244 |             let mut chars = word.chars();
[INFO] [stdout]     |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_chars`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `chars`
[INFO] [stdout]    --> src/lib.rs:244:21
[INFO] [stdout]     |
[INFO] [stdout] 244 |             let mut chars = word.chars();
[INFO] [stdout]     |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_chars`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:244:17
[INFO] [stdout]     |
[INFO] [stdout] 244 |             let mut chars = word.chars();
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:244:17
[INFO] [stdout]     |
[INFO] [stdout] 244 |             let mut chars = word.chars();
[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 `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:254:29
[INFO] [stdout]     |
[INFO] [stdout] 254 | ...                   argument.add_value(& mut input_iter);
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:277:29
[INFO] [stdout]     |
[INFO] [stdout] 277 | ...                   argument.add_value(& mut input_iter);
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:254:29
[INFO] [stdout]     |
[INFO] [stdout] 254 | ...                   argument.add_value(& mut input_iter);
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:277:29
[INFO] [stdout]     |
[INFO] [stdout] 277 | ...                   argument.add_value(& mut input_iter);
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.45s
[INFO] running `Command { std: "docker" "inspect" "570740ba649d51db1219f7268b2a56150b45db3f9c9d10971189a7e9f870c3a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "570740ba649d51db1219f7268b2a56150b45db3f9c9d10971189a7e9f870c3a3", kill_on_drop: false }`
[INFO] [stdout] 570740ba649d51db1219f7268b2a56150b45db3f9c9d10971189a7e9f870c3a3