[INFO] fetching crate rust_black_tree 0.1.5...
[INFO] checking rust_black_tree-0.1.5 against master#0d37dca25a51fb900a402c94c8818ad1c2789e30 for pr-77526
[INFO] extracting crate rust_black_tree 0.1.5 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate rust_black_tree 0.1.5 on toolchain 0d37dca25a51fb900a402c94c8818ad1c2789e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rust_black_tree 0.1.5
[INFO] finished tweaking crates.io crate rust_black_tree 0.1.5
[INFO] tweaked toml for crates.io crate rust_black_tree 0.1.5 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate rust_black_tree 0.1.5 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b16347431e4e314ffe8c01eba3dc171b2b1f24dbe29df61e74d4cc1dad5c8a3c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b16347431e4e314ffe8c01eba3dc171b2b1f24dbe29df61e74d4cc1dad5c8a3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b16347431e4e314ffe8c01eba3dc171b2b1f24dbe29df61e74d4cc1dad5c8a3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b16347431e4e314ffe8c01eba3dc171b2b1f24dbe29df61e74d4cc1dad5c8a3c", kill_on_drop: false }`
[INFO] [stdout] b16347431e4e314ffe8c01eba3dc171b2b1f24dbe29df61e74d4cc1dad5c8a3c
[INFO] running `Command { std: "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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 041a76c4006a880ffcd7c6a9c0cd450bc7e9432e59f7265ff739ed5ee8522718
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "041a76c4006a880ffcd7c6a9c0cd450bc7e9432e59f7265ff739ed5ee8522718", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking static_assertions v0.3.4
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]     Checking utf8parse v0.1.1
[INFO] [stderr]     Checking unicode-segmentation v1.6.0
[INFO] [stderr]     Checking regex-syntax v0.6.15
[INFO] [stderr]     Checking oorandom v11.1.0
[INFO] [stderr]    Compiling nom v5.1.1
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking memchr v2.3.3
[INFO] [stderr]    Compiling memoffset v0.5.3
[INFO] [stderr]    Compiling lexical-core v0.6.7
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]     Checking serde_json v1.0.48
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]     Checking regex-automata v0.1.8
[INFO] [stderr]     Checking bstr v0.2.11
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking num_cpus v1.12.0
[INFO] [stderr]     Checking nix v0.14.1
[INFO] [stderr]     Checking isatty v0.1.9
[INFO] [stderr]     Checking term_size v0.3.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking criterion-plot v0.4.1
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking crossbeam-queue v0.2.1
[INFO] [stderr]     Checking regex v1.3.4
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking tinytemplate v1.0.3
[INFO] [stderr]     Checking rayon-core v1.7.0
[INFO] [stderr]     Checking rayon v1.3.0
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking plotters v0.2.12
[INFO] [stderr]     Checking rustyline v6.0.0
[INFO] [stderr]     Checking rust_black_tree v0.1.5 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]     Checking criterion v0.3.1
[INFO] [stdout] warning: unused import: `std::iter`
[INFO] [stdout]  --> benches/my_benchmark.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::iter;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Throughput`
[INFO] [stdout]  --> benches/my_benchmark.rs:3:74
[INFO] [stdout]   |
[INFO] [stdout] 3 | use criterion::{criterion_group, criterion_main, BenchmarkId, Criterion, Throughput};
[INFO] [stdout]   |                                                                          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 09s
[INFO] running `Command { std: "docker" "inspect" "041a76c4006a880ffcd7c6a9c0cd450bc7e9432e59f7265ff739ed5ee8522718", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "041a76c4006a880ffcd7c6a9c0cd450bc7e9432e59f7265ff739ed5ee8522718", kill_on_drop: false }`
[INFO] [stdout] 041a76c4006a880ffcd7c6a9c0cd450bc7e9432e59f7265ff739ed5ee8522718