[INFO] fetching crate const_fn 0.3.1...
[INFO] checking const_fn-0.3.1 against master#4fb54ed484e2239a3e9eff3be17df00d2a162be3 for pr-73345
[INFO] extracting crate const_fn 0.3.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate const_fn 0.3.1 on toolchain 4fb54ed484e2239a3e9eff3be17df00d2a162be3
[INFO] running `"/workspace/cargo-home/bin/cargo" "+4fb54ed484e2239a3e9eff3be17df00d2a162be3" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate const_fn 0.3.1
[INFO] finished tweaking crates.io crate const_fn 0.3.1
[INFO] tweaked toml for crates.io crate const_fn 0.3.1 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+4fb54ed484e2239a3e9eff3be17df00d2a162be3" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+4fb54ed484e2239a3e9eff3be17df00d2a162be3" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+4fb54ed484e2239a3e9eff3be17df00d2a162be3" "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] d92efb334f3131cc2dd23ffb6a3525fa249d75485a0b27152ea2b059edd80a81
[INFO] running `"docker" "start" "-a" "d92efb334f3131cc2dd23ffb6a3525fa249d75485a0b27152ea2b059edd80a81"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[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 syn-mid v0.5.0
[INFO] [stderr]     Checking const_fn v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused extern crate
[INFO] [stderr]   --> src/lib.rs:71:1
[INFO] [stderr]    |
[INFO] [stderr] 71 | extern crate proc_macro;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove it
[INFO] [stderr]    |
[INFO] [stderr] note: the lint level is defined here
[INFO] [stderr]   --> src/lib.rs:68:9
[INFO] [stderr]    |
[INFO] [stderr] 68 | #![warn(rust_2018_idioms, single_use_lifetimes, unreachable_pub)]
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^
[INFO] [stderr]    = note: `#[warn(unused_extern_crates)]` implied by `#[warn(rust_2018_idioms)]`
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused extern crate
[INFO] [stderr]   --> src/lib.rs:71:1
[INFO] [stderr]    |
[INFO] [stderr] 71 | extern crate proc_macro;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove it
[INFO] [stderr]    |
[INFO] [stderr] note: the lint level is defined here
[INFO] [stderr]   --> src/lib.rs:68:9
[INFO] [stderr]    |
[INFO] [stderr] 68 | #![warn(rust_2018_idioms, single_use_lifetimes, unreachable_pub)]
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^
[INFO] [stderr]    = note: `#[warn(unused_extern_crates)]` implied by `#[warn(rust_2018_idioms)]`
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.65s
[INFO] running `"docker" "inspect" "d92efb334f3131cc2dd23ffb6a3525fa249d75485a0b27152ea2b059edd80a81"`
[INFO] running `"docker" "rm" "-f" "d92efb334f3131cc2dd23ffb6a3525fa249d75485a0b27152ea2b059edd80a81"`
[INFO] [stdout] d92efb334f3131cc2dd23ffb6a3525fa249d75485a0b27152ea2b059edd80a81