[INFO] fetching crate mbot_proc_macro_helpers 0.0.1...
[INFO] checking mbot_proc_macro_helpers-0.0.1 against try#8de4b308b608cded0ebccf658a0fc719bce87d4e for pr-89056
[INFO] extracting crate mbot_proc_macro_helpers 0.0.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate mbot_proc_macro_helpers 0.0.1 on toolchain 8de4b308b608cded0ebccf658a0fc719bce87d4e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mbot_proc_macro_helpers 0.0.1
[INFO] finished tweaking crates.io crate mbot_proc_macro_helpers 0.0.1
[INFO] tweaked toml for crates.io crate mbot_proc_macro_helpers 0.0.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2da0c876727183c209d98b2cb32a062797a8786abe373b07ce8392b93c83d103
[INFO] running `Command { std: "docker" "start" "-a" "2da0c876727183c209d98b2cb32a062797a8786abe373b07ce8392b93c83d103", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2da0c876727183c209d98b2cb32a062797a8786abe373b07ce8392b93c83d103", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2da0c876727183c209d98b2cb32a062797a8786abe373b07ce8392b93c83d103", kill_on_drop: false }`
[INFO] [stdout] 2da0c876727183c209d98b2cb32a062797a8786abe373b07ce8392b93c83d103
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 57cd56a5b6254583c0e6bc13ba70347b6b4a88157398f3bb7d3497ecb3b9bc87
[INFO] running `Command { std: "docker" "start" "-a" "57cd56a5b6254583c0e6bc13ba70347b6b4a88157398f3bb7d3497ecb3b9bc87", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling derive-syn-parse v0.1.5
[INFO] [stderr]     Checking mbot_proc_macro_helpers v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `colon_token`
[INFO] [stdout]  --> src/mice.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     colon_token: Token![:],
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `trailing_comma`
[INFO] [stdout]  --> src/mice.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     trailing_comma: Option<Token![,]>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `unary_ident`
[INFO] [stdout]   --> src/mice.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     unary_ident: Option<Ident>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `binary_ident`
[INFO] [stdout]   --> src/mice.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     binary_ident: Option<Ident>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `brace_token`
[INFO] [stdout]   --> src/mice.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 43 |     brace_token: Brace,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `kind_token`
[INFO] [stdout]   --> src/mice.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 |     kind_token: Ident,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `arrow_token`
[INFO] [stdout]   --> src/mice.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     arrow_token: Token![=>],
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `arg_paren`
[INFO] [stdout]   --> src/mice.rs:57:5
[INFO] [stdout]    |
[INFO] [stdout] 57 |     arg_paren: Paren,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `semicolon_token`
[INFO] [stdout]   --> src/mice.rs:62:5
[INFO] [stdout]    |
[INFO] [stdout] 62 |     semicolon_token: Token![;],
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `sum_equal_token`
[INFO] [stdout]   --> src/mice.rs:74:5
[INFO] [stdout]    |
[INFO] [stdout] 74 |     sum_equal_token: Token![=],
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `brace_token`
[INFO] [stdout]   --> src/mice.rs:83:5
[INFO] [stdout]    |
[INFO] [stdout] 83 |     brace_token: Brace,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `colon_token`
[INFO] [stdout]  --> src/mice.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     colon_token: Token![:],
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `trailing_comma`
[INFO] [stdout]  --> src/mice.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     trailing_comma: Option<Token![,]>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `unary_ident`
[INFO] [stdout]   --> src/mice.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     unary_ident: Option<Ident>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `binary_ident`
[INFO] [stdout]   --> src/mice.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     binary_ident: Option<Ident>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `brace_token`
[INFO] [stdout]   --> src/mice.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 43 |     brace_token: Brace,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `kind_token`
[INFO] [stdout]   --> src/mice.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 |     kind_token: Ident,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `arrow_token`
[INFO] [stdout]   --> src/mice.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     arrow_token: Token![=>],
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `arg_paren`
[INFO] [stdout]   --> src/mice.rs:57:5
[INFO] [stdout]    |
[INFO] [stdout] 57 |     arg_paren: Paren,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `semicolon_token`
[INFO] [stdout]   --> src/mice.rs:62:5
[INFO] [stdout]    |
[INFO] [stdout] 62 |     semicolon_token: Token![;],
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `sum_equal_token`
[INFO] [stdout]   --> src/mice.rs:74:5
[INFO] [stdout]    |
[INFO] [stdout] 74 |     sum_equal_token: Token![=],
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `brace_token`
[INFO] [stdout]   --> src/mice.rs:83:5
[INFO] [stdout]    |
[INFO] [stdout] 83 |     brace_token: Brace,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.92s
[INFO] running `Command { std: "docker" "inspect" "57cd56a5b6254583c0e6bc13ba70347b6b4a88157398f3bb7d3497ecb3b9bc87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57cd56a5b6254583c0e6bc13ba70347b6b4a88157398f3bb7d3497ecb3b9bc87", kill_on_drop: false }`
[INFO] [stdout] 57cd56a5b6254583c0e6bc13ba70347b6b4a88157398f3bb7d3497ecb3b9bc87