[INFO] fetching crate flexi_logger 0.14.3...
[INFO] checking flexi_logger-0.14.3 against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] extracting crate flexi_logger 0.14.3 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate flexi_logger 0.14.3 on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate flexi_logger 0.14.3
[INFO] finished tweaking crates.io crate flexi_logger 0.14.3
[INFO] tweaked toml for crates.io crate flexi_logger 0.14.3 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate flexi_logger 0.14.3 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] cfe3f268f4cb73004ffa35c8642eef5a27886b79c20e53fbfe8a95f43646e29a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "cfe3f268f4cb73004ffa35c8642eef5a27886b79c20e53fbfe8a95f43646e29a"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling syn v0.15.40
[INFO] [stderr]    Compiling log v0.4.7
[INFO] [stderr]     Checking regex-syntax v0.6.10
[INFO] [stderr]     Checking itertools v0.8.0
[INFO] [stderr]     Checking toml v0.5.1
[INFO] [stderr]     Checking pulldown-cmark v0.4.1
[INFO] [stderr]     Checking quote v0.6.13
[INFO] [stderr]     Checking regex v1.2.0
[INFO] [stderr]     Checking flexi_logger v0.14.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking version-sync v0.8.1
[INFO] [stderr]    Compiling serde_derive v1.0.97
[INFO] [stderr] warning: the feature `extern_crate_item_prelude` has been stable since 1.31.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> benches/bench_standard.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(extern_crate_item_prelude)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `extern_crate_item_prelude` has been stable since 1.31.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> benches/bench_reconfigurable.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(extern_crate_item_prelude)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.82s
[INFO] running `"docker" "inspect" "cfe3f268f4cb73004ffa35c8642eef5a27886b79c20e53fbfe8a95f43646e29a"`
[INFO] running `"docker" "rm" "-f" "cfe3f268f4cb73004ffa35c8642eef5a27886b79c20e53fbfe8a95f43646e29a"`
[INFO] [stdout] cfe3f268f4cb73004ffa35c8642eef5a27886b79c20e53fbfe8a95f43646e29a