[INFO] fetching crate gumdrop 0.8.0...
[INFO] checking gumdrop-0.8.0 against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863
[INFO] extracting crate gumdrop 0.8.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate gumdrop 0.8.0 on toolchain 36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate gumdrop 0.8.0
[INFO] finished tweaking crates.io crate gumdrop 0.8.0
[INFO] tweaked toml for crates.io crate gumdrop 0.8.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate gumdrop 0.8.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] be1c84d90682d4c1ea651e693d3aae11d101e75b0616a247056cc3b8f8fe0a76
[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" "be1c84d90682d4c1ea651e693d3aae11d101e75b0616a247056cc3b8f8fe0a76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be1c84d90682d4c1ea651e693d3aae11d101e75b0616a247056cc3b8f8fe0a76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be1c84d90682d4c1ea651e693d3aae11d101e75b0616a247056cc3b8f8fe0a76", kill_on_drop: false }`
[INFO] [stdout] be1c84d90682d4c1ea651e693d3aae11d101e75b0616a247056cc3b8f8fe0a76
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 76303437f8bd5be4a9b54a2b9964e2f7459c336f3ecddb16e7feee1d96a0331f
[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" "76303437f8bd5be4a9b54a2b9964e2f7459c336f3ecddb16e7feee1d96a0331f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]     Checking assert_matches v1.3.0
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling gumdrop_derive v0.8.0
[INFO] [stderr]     Checking gumdrop v0.8.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `a`
[INFO] [stdout]   --> tests/options.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |         a: i32,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `b`
[INFO] [stdout]   --> tests/options.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |         b: ::std::string::String,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `c`
[INFO] [stdout]   --> tests/options.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |         c: ::std::option::Option<::std::string::String>,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `d`
[INFO] [stdout]   --> tests/options.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |         d: ::std::option::Option<i32>,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `g`
[INFO] [stdout]   --> tests/options.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 |         g: ::std::option::Option<(i32, i32)>,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `a`
[INFO] [stdout]   --> tests/options.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |         a: i32,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `first`
[INFO] [stdout]   --> tests/options.rs:71:9
[INFO] [stdout]    |
[INFO] [stdout] 71 |         first: ::std::option::Option<::std::string::String>,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `a`
[INFO] [stdout]   --> tests/options.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |         a: i32,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `foo`
[INFO] [stdout]    --> tests/options.rs:385:9
[INFO] [stdout]     |
[INFO] [stdout] 385 |         foo: Option<(i32, i32)>,
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `alpha`
[INFO] [stdout]    --> tests/options.rs:594:9
[INFO] [stdout]     |
[INFO] [stdout] 594 |         alpha: bool,
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `bravo`
[INFO] [stdout]    --> tests/options.rs:596:9
[INFO] [stdout]     |
[INFO] [stdout] 596 |         bravo: String,
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `charlie`
[INFO] [stdout]    --> tests/options.rs:598:9
[INFO] [stdout]     |
[INFO] [stdout] 598 |         charlie: bool,
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `delta`
[INFO] [stdout]    --> tests/options.rs:600:9
[INFO] [stdout]     |
[INFO] [stdout] 600 |         delta: i32,
[INFO] [stdout]     |         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `foxtrot`
[INFO] [stdout]    --> tests/options.rs:604:9
[INFO] [stdout]     |
[INFO] [stdout] 604 |         foxtrot: u32,
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `very_very_long_option_with_very_very_long_name`
[INFO] [stdout]    --> tests/options.rs:606:9
[INFO] [stdout]     |
[INFO] [stdout] 606 |         very_very_long_option_with_very_very_long_name: bool,
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `alpha`
[INFO] [stdout]    --> tests/options.rs:625:9
[INFO] [stdout]     |
[INFO] [stdout] 625 |         alpha: (),
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `bravo`
[INFO] [stdout]    --> tests/options.rs:627:9
[INFO] [stdout]     |
[INFO] [stdout] 627 |         bravo: (i32,),
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `charlie`
[INFO] [stdout]    --> tests/options.rs:629:9
[INFO] [stdout]     |
[INFO] [stdout] 629 |         charlie: (i32, i32),
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `delta`
[INFO] [stdout]    --> tests/options.rs:631:9
[INFO] [stdout]     |
[INFO] [stdout] 631 |         delta: (i32, i32, i32),
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `echo`
[INFO] [stdout]    --> tests/options.rs:633:9
[INFO] [stdout]     |
[INFO] [stdout] 633 |         echo: (i32, i32, i32, i32),
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `a`
[INFO] [stdout]    --> tests/options.rs:652:9
[INFO] [stdout]     |
[INFO] [stdout] 652 |         a: u32,
[INFO] [stdout]     |         ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `b`
[INFO] [stdout]    --> tests/options.rs:654:9
[INFO] [stdout]     |
[INFO] [stdout] 654 |         b: u32,
[INFO] [stdout]     |         ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `c`
[INFO] [stdout]    --> tests/options.rs:656:9
[INFO] [stdout]     |
[INFO] [stdout] 656 |         c: u32,
[INFO] [stdout]     |         ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `option`
[INFO] [stdout]    --> tests/options.rs:659:9
[INFO] [stdout]     |
[INFO] [stdout] 659 |         option: bool,
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `help`
[INFO] [stdout]    --> tests/options.rs:693:9
[INFO] [stdout]     |
[INFO] [stdout] 693 |         help: bool,
[INFO] [stdout]     |         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `optional`
[INFO] [stdout]    --> tests/options.rs:889:9
[INFO] [stdout]     |
[INFO] [stdout] 889 |         optional: i32,
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `optional`
[INFO] [stdout]    --> tests/options.rs:896:9
[INFO] [stdout]     |
[INFO] [stdout] 896 |         optional: i32,
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `optional`
[INFO] [stdout]    --> tests/options.rs:908:9
[INFO] [stdout]     |
[INFO] [stdout] 908 |         optional: i32,
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `thing`
[INFO] [stdout]    --> tests/options.rs:939:9
[INFO] [stdout]     |
[INFO] [stdout] 939 |         thing: Option<String>,
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `thing`
[INFO] [stdout]    --> tests/options.rs:946:9
[INFO] [stdout]     |
[INFO] [stdout] 946 |         thing: Option<String>,
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `foo`
[INFO] [stdout]     --> tests/options.rs:1054:9
[INFO] [stdout]      |
[INFO] [stdout] 1054 |         foo: u32,
[INFO] [stdout]      |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `free`
[INFO] [stdout]     --> tests/options.rs:1155:9
[INFO] [stdout]      |
[INFO] [stdout] 1155 |         free: i32,
[INFO] [stdout]      |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `foo`
[INFO] [stdout]     --> tests/options.rs:1157:9
[INFO] [stdout]      |
[INFO] [stdout] 1157 |         foo: i32,
[INFO] [stdout]      |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `bar`
[INFO] [stdout]     --> tests/options.rs:1160:9
[INFO] [stdout]      |
[INFO] [stdout] 1160 |         bar: i32,
[INFO] [stdout]      |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `foo`
[INFO] [stdout]     --> tests/options.rs:1196:9
[INFO] [stdout]      |
[INFO] [stdout] 1196 |         foo: u32,
[INFO] [stdout]      |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `bar`
[INFO] [stdout]     --> tests/options.rs:1198:9
[INFO] [stdout]      |
[INFO] [stdout] 1198 |         bar: u32,
[INFO] [stdout]      |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 36 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.19s
[INFO] running `Command { std: "docker" "inspect" "76303437f8bd5be4a9b54a2b9964e2f7459c336f3ecddb16e7feee1d96a0331f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76303437f8bd5be4a9b54a2b9964e2f7459c336f3ecddb16e7feee1d96a0331f", kill_on_drop: false }`
[INFO] [stdout] 76303437f8bd5be4a9b54a2b9964e2f7459c336f3ecddb16e7feee1d96a0331f