[INFO] fetching crate esyn-derive 0.9.1...
[INFO] checking esyn-derive-0.9.1 against master#43ca9d18e333797f0aa3b525501a7cec8d61a96b for pr-136764
[INFO] extracting crate esyn-derive 0.9.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate esyn-derive 0.9.1 on toolchain 43ca9d18e333797f0aa3b525501a7cec8d61a96b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+43ca9d18e333797f0aa3b525501a7cec8d61a96b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate esyn-derive 0.9.1
[INFO] finished tweaking crates.io crate esyn-derive 0.9.1
[INFO] tweaked toml for crates.io crate esyn-derive 0.9.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+43ca9d18e333797f0aa3b525501a7cec8d61a96b" "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]      Locking 4 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+43ca9d18e333797f0aa3b525501a7cec8d61a96b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+43ca9d18e333797f0aa3b525501a7cec8d61a96b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fcbd61dad5997654188177b26a0d51b07ed98a3401204b931eeb7bff6f1e52be
[INFO] running `Command { std: "docker" "start" "-a" "fcbd61dad5997654188177b26a0d51b07ed98a3401204b931eeb7bff6f1e52be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fcbd61dad5997654188177b26a0d51b07ed98a3401204b931eeb7bff6f1e52be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fcbd61dad5997654188177b26a0d51b07ed98a3401204b931eeb7bff6f1e52be", kill_on_drop: false }`
[INFO] [stdout] fcbd61dad5997654188177b26a0d51b07ed98a3401204b931eeb7bff6f1e52be
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+43ca9d18e333797f0aa3b525501a7cec8d61a96b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 37572d6f308cbbf93c4f8c730970b6620ae5c95ef0cb0731c79bef4226a2bf1e
[INFO] running `Command { std: "docker" "start" "-a" "37572d6f308cbbf93c4f8c730970b6620ae5c95ef0cb0731c79bef4226a2bf1e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
[INFO] [stderr]     Checking unicode-ident v1.0.16
[INFO] [stderr]     Checking quote v1.0.38
[INFO] [stderr]     Checking syn v2.0.98
[INFO] [stderr]     Checking esyn-derive v0.9.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `attr`
[INFO] [stdout]  --> src/ders_enum_named.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{attr, bound};
[INFO] [stdout]   |             ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `attr`
[INFO] [stdout]  --> src/ders_enum_named.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{attr, bound};
[INFO] [stdout]   |             ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `generics`
[INFO] [stdout]  --> src/ders_enum_named.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let generics = bound::de_trait_bounds_struct(input.generics.clone());
[INFO] [stdout]   |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_generics`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `generics`
[INFO] [stdout]  --> src/ders_enum_named.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let generics = bound::de_trait_bounds_struct(input.generics.clone());
[INFO] [stdout]   |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_generics`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.25s
[INFO] running `Command { std: "docker" "inspect" "37572d6f308cbbf93c4f8c730970b6620ae5c95ef0cb0731c79bef4226a2bf1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37572d6f308cbbf93c4f8c730970b6620ae5c95ef0cb0731c79bef4226a2bf1e", kill_on_drop: false }`
[INFO] [stdout] 37572d6f308cbbf93c4f8c730970b6620ae5c95ef0cb0731c79bef4226a2bf1e