[INFO] fetching crate alt_serde_derive 1.0.104...
[INFO] checking alt_serde_derive-1.0.104 against try#c8bdaa84ec1b37f18f30375e196a65b7602f3790 for pr-73345
[INFO] extracting crate alt_serde_derive 1.0.104 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate alt_serde_derive 1.0.104 on toolchain c8bdaa84ec1b37f18f30375e196a65b7602f3790
[INFO] running `"/workspace/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate alt_serde_derive 1.0.104
[INFO] finished tweaking crates.io crate alt_serde_derive 1.0.104
[INFO] tweaked toml for crates.io crate alt_serde_derive 1.0.104 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "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] 77af0f0c4088db7cf34a9b165cd0d952adbb016a28a35fdf11ccc499c59f0964
[INFO] running `"docker" "start" "-a" "77af0f0c4088db7cf34a9b165cd0d952adbb016a28a35fdf11ccc499c59f0964"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.31
[INFO] [stderr]     Checking proc-macro2 v1.0.18
[INFO] [stderr]     Checking quote v1.0.7
[INFO] [stderr]     Checking alt_serde_derive v1.0.104 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]    --> src/ser.rs:875:13
[INFO] [stderr]     |
[INFO] [stderr] 875 |             (StructTrait::SerializeStruct)
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]    --> src/ser.rs:875:13
[INFO] [stderr]     |
[INFO] [stderr] 875 |             (StructTrait::SerializeStruct)
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` 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 10.05s
[INFO] running `"docker" "inspect" "77af0f0c4088db7cf34a9b165cd0d952adbb016a28a35fdf11ccc499c59f0964"`
[INFO] running `"docker" "rm" "-f" "77af0f0c4088db7cf34a9b165cd0d952adbb016a28a35fdf11ccc499c59f0964"`
[INFO] [stdout] 77af0f0c4088db7cf34a9b165cd0d952adbb016a28a35fdf11ccc499c59f0964