[INFO] crate lain_derive 0.2.4 is already in cache
[INFO] checking lain_derive-0.2.4 against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] extracting crate lain_derive 0.2.4 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate lain_derive 0.2.4 on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate lain_derive 0.2.4
[INFO] finished tweaking crates.io crate lain_derive 0.2.4
[INFO] tweaked toml for crates.io crate lain_derive 0.2.4 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a66914ff743ef8fcd5348d89718870577b4baf04d86a610927dfb783c56710c3
[INFO] running `"docker" "start" "-a" "a66914ff743ef8fcd5348d89718870577b4baf04d86a610927dfb783c56710c3"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling proc-macro-hack-impl v0.4.2
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling proc-macro-hack v0.4.2
[INFO] [stderr]     Checking quote v0.6.13
[INFO] [stderr]    Compiling mashup-impl v0.1.9
[INFO] [stderr]     Checking mashup v0.1.9
[INFO] [stderr]     Checking lain_derive v0.2.4 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `field_max_items`
[INFO] [stderr]    --> src/mutations.rs:513:9
[INFO] [stderr]     |
[INFO] [stderr] 513 |     let field_max_items = field.attrs.min().unwrap_or(&zero_tokens);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_field_max_items`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `field_max_items`
[INFO] [stderr]    --> src/mutations.rs:513:9
[INFO] [stderr]     |
[INFO] [stderr] 513 |     let field_max_items = field.attrs.min().unwrap_or(&zero_tokens);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_field_max_items`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.81s
[INFO] running `"docker" "inspect" "a66914ff743ef8fcd5348d89718870577b4baf04d86a610927dfb783c56710c3"`
[INFO] running `"docker" "rm" "-f" "a66914ff743ef8fcd5348d89718870577b4baf04d86a610927dfb783c56710c3"`
[INFO] [stdout] a66914ff743ef8fcd5348d89718870577b4baf04d86a610927dfb783c56710c3