[INFO] fetching crate cenum-derive 1.0.3...
[INFO] checking cenum-derive-1.0.3 against try#8d46be77cd48fdbcced888d027457e2c9cf2aa16 for pr-142723
[INFO] extracting crate cenum-derive 1.0.3 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate cenum-derive 1.0.3 on toolchain 8d46be77cd48fdbcced888d027457e2c9cf2aa16
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8d46be77cd48fdbcced888d027457e2c9cf2aa16" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cenum-derive 1.0.3
[INFO] finished tweaking crates.io crate cenum-derive 1.0.3
[INFO] tweaked toml for crates.io crate cenum-derive 1.0.3 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8d46be77cd48fdbcced888d027457e2c9cf2aa16" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 4 packages to latest compatible versions
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.104)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8d46be77cd48fdbcced888d027457e2c9cf2aa16" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8d46be77cd48fdbcced888d027457e2c9cf2aa16" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3bdf135af11027c3360ffb4fec45cd0f604fce5b981838b51602b0e7422b7a91
[INFO] running `Command { std: "docker" "start" "-a" "3bdf135af11027c3360ffb4fec45cd0f604fce5b981838b51602b0e7422b7a91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3bdf135af11027c3360ffb4fec45cd0f604fce5b981838b51602b0e7422b7a91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3bdf135af11027c3360ffb4fec45cd0f604fce5b981838b51602b0e7422b7a91", kill_on_drop: false }`
[INFO] [stdout] 3bdf135af11027c3360ffb4fec45cd0f604fce5b981838b51602b0e7422b7a91
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8d46be77cd48fdbcced888d027457e2c9cf2aa16" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e6bda898da3301b8c45a805ef27873b3ff75343dc252c96ded79f4f4a07c0a89
[INFO] running `Command { std: "docker" "start" "-a" "e6bda898da3301b8c45a805ef27873b3ff75343dc252c96ded79f4f4a07c0a89", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]     Checking unicode-ident v1.0.18
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking quote v1.0.40
[INFO] [stderr]     Checking cenum-derive v1.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary braces around method argument
[INFO] [stdout]   --> src/lib.rs:85:18
[INFO] [stdout]    |
[INFO] [stdout] 85 |             .map({ |(key, value)| format!("({}::{}, {})", name.to_string(), key, value) })
[INFO] [stdout]    |                  ^^                                                                    ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] 85 -             .map({ |(key, value)| format!("({}::{}, {})", name.to_string(), key, value) })
[INFO] [stdout] 85 +             .map(|(key, value)| format!("({}::{}, {})", name.to_string(), key, value))
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around method argument
[INFO] [stdout]   --> src/lib.rs:85:18
[INFO] [stdout]    |
[INFO] [stdout] 85 |             .map({ |(key, value)| format!("({}::{}, {})", name.to_string(), key, value) })
[INFO] [stdout]    |                  ^^                                                                    ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] 85 -             .map({ |(key, value)| format!("({}::{}, {})", name.to_string(), key, value) })
[INFO] [stdout] 85 +             .map(|(key, value)| format!("({}::{}, {})", name.to_string(), key, value))
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.29s
[INFO] running `Command { std: "docker" "inspect" "e6bda898da3301b8c45a805ef27873b3ff75343dc252c96ded79f4f4a07c0a89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6bda898da3301b8c45a805ef27873b3ff75343dc252c96ded79f4f4a07c0a89", kill_on_drop: false }`
[INFO] [stdout] e6bda898da3301b8c45a805ef27873b3ff75343dc252c96ded79f4f4a07c0a89