[INFO] fetching crate opt_struct 0.1.2...
[INFO] checking opt_struct-0.1.2 against try#de0e80659cee4f27282e60d63bbb8c5271a0d147 for pr-129392
[INFO] extracting crate opt_struct 0.1.2 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate opt_struct 0.1.2 on toolchain de0e80659cee4f27282e60d63bbb8c5271a0d147
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+de0e80659cee4f27282e60d63bbb8c5271a0d147" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate opt_struct 0.1.2
[INFO] finished tweaking crates.io crate opt_struct 0.1.2
[INFO] tweaked toml for crates.io crate opt_struct 0.1.2 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+de0e80659cee4f27282e60d63bbb8c5271a0d147" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+de0e80659cee4f27282e60d63bbb8c5271a0d147" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+de0e80659cee4f27282e60d63bbb8c5271a0d147" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c17814ede7a22cd51234bc6167b9961536c654898ab7361d8f40752b9a19bc39
[INFO] running `Command { std: "docker" "start" "-a" "c17814ede7a22cd51234bc6167b9961536c654898ab7361d8f40752b9a19bc39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c17814ede7a22cd51234bc6167b9961536c654898ab7361d8f40752b9a19bc39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c17814ede7a22cd51234bc6167b9961536c654898ab7361d8f40752b9a19bc39", kill_on_drop: false }`
[INFO] [stdout] c17814ede7a22cd51234bc6167b9961536c654898ab7361d8f40752b9a19bc39
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+de0e80659cee4f27282e60d63bbb8c5271a0d147" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9ac84deb2b0b1d89c33e9fc5a31b774d75dcbfddb86dd95c49b80bb224875457
[INFO] running `Command { std: "docker" "start" "-a" "9ac84deb2b0b1d89c33e9fc5a31b774d75dcbfddb86dd95c49b80bb224875457", kill_on_drop: false }`
[INFO] [stderr]     Checking opt_struct v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/hash_map.rs:215:32
[INFO] [stdout]     |
[INFO] [stdout] 215 | pub struct TupleMapper<'t,T,V>(&'t (T,V));
[INFO] [stdout]     |            -----------         ^^^^^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/hash_map.rs:215:32
[INFO] [stdout]     |
[INFO] [stdout] 215 | pub struct TupleMapper<'t,T,V>(&'t (T,V));
[INFO] [stdout]     |            -----------         ^^^^^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[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` profile [unoptimized + debuginfo] target(s) in 0.20s
[INFO] running `Command { std: "docker" "inspect" "9ac84deb2b0b1d89c33e9fc5a31b774d75dcbfddb86dd95c49b80bb224875457", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ac84deb2b0b1d89c33e9fc5a31b774d75dcbfddb86dd95c49b80bb224875457", kill_on_drop: false }`
[INFO] [stdout] 9ac84deb2b0b1d89c33e9fc5a31b774d75dcbfddb86dd95c49b80bb224875457