[INFO] fetching crate enum-tags 0.1.0...
[INFO] checking enum-tags-0.1.0 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate enum-tags 0.1.0 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate enum-tags 0.1.0
[INFO] finished tweaking crates.io crate enum-tags 0.1.0
[INFO] tweaked toml for crates.io crate enum-tags 0.1.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate enum-tags 0.1.0 on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 6 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded enum-tags-traits v0.1.0
[INFO] [stderr]   Downloaded enum-tags-macros v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2e7e81386137fa9421bf8e4ed3785b1ec8500f08a52f743806b8ca3e34a4682c
[INFO] running `Command { std: "docker" "start" "-a" "2e7e81386137fa9421bf8e4ed3785b1ec8500f08a52f743806b8ca3e34a4682c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2e7e81386137fa9421bf8e4ed3785b1ec8500f08a52f743806b8ca3e34a4682c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e7e81386137fa9421bf8e4ed3785b1ec8500f08a52f743806b8ca3e34a4682c", kill_on_drop: false }`
[INFO] [stdout] 2e7e81386137fa9421bf8e4ed3785b1ec8500f08a52f743806b8ca3e34a4682c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0ca7b079a4bc308f97e933b30bb6957bedeaaa50a569565abde12c3967bbafd0
[INFO] running `Command { std: "docker" "start" "-a" "0ca7b079a4bc308f97e933b30bb6957bedeaaa50a569565abde12c3967bbafd0", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking enum-tags-traits v0.1.0
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling enum-tags-macros v0.1.0
[INFO] [stderr]     Checking enum-tags v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> tests/test.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 |     A(u8),
[INFO] [stdout]    |     - ^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 13 -     A(u8),
[INFO] [stdout] 13 +     A(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `B` and `C` are never constructed
[INFO] [stdout]   --> tests/test.rs:14:2
[INFO] [stdout]    |
[INFO] [stdout] 12 | enum WithUnnamedFields {
[INFO] [stdout]    |      ----------------- variants in this enum
[INFO] [stdout] 13 |     A(u8),
[INFO] [stdout] 14 |     B(bool),
[INFO] [stdout]    |     ^
[INFO] [stdout] 15 |     C(char),
[INFO] [stdout]    |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `byte` is never read
[INFO] [stdout]   --> tests/test.rs:20:6
[INFO] [stdout]    |
[INFO] [stdout] 20 |     A { byte: u8 },
[INFO] [stdout]    |     -   ^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `B` and `C` are never constructed
[INFO] [stdout]   --> tests/test.rs:21:2
[INFO] [stdout]    |
[INFO] [stdout] 19 | enum WithNamedFields {
[INFO] [stdout]    |      --------------- variants in this enum
[INFO] [stdout] 20 |     A { byte: u8 },
[INFO] [stdout] 21 |     B { boolean: bool },
[INFO] [stdout]    |     ^
[INFO] [stdout] 22 |     C { character: char },
[INFO] [stdout]    |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `A` is never constructed
[INFO] [stdout]   --> tests/test.rs:30:2
[INFO] [stdout]    |
[INFO] [stdout] 26 | enum WithGenerics<T>
[INFO] [stdout]    |      ------------ variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 30 |     A(Box<T>),
[INFO] [stdout]    |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.81s
[INFO] running `Command { std: "docker" "inspect" "0ca7b079a4bc308f97e933b30bb6957bedeaaa50a569565abde12c3967bbafd0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ca7b079a4bc308f97e933b30bb6957bedeaaa50a569565abde12c3967bbafd0", kill_on_drop: false }`
[INFO] [stdout] 0ca7b079a4bc308f97e933b30bb6957bedeaaa50a569565abde12c3967bbafd0