[INFO] fetching crate bcc 0.0.31...
[INFO] checking bcc-0.0.31 against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] extracting crate bcc 0.0.31 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate bcc 0.0.31 on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bcc 0.0.31
[INFO] finished tweaking crates.io crate bcc 0.0.31
[INFO] tweaked toml for crates.io crate bcc 0.0.31 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate crates.io crate bcc 0.0.31 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dee9bf55d4a4237bde6a5afa9687992c390e606b5e7e6975d2232e2acd1b2c2b
[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" "dee9bf55d4a4237bde6a5afa9687992c390e606b5e7e6975d2232e2acd1b2c2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dee9bf55d4a4237bde6a5afa9687992c390e606b5e7e6975d2232e2acd1b2c2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dee9bf55d4a4237bde6a5afa9687992c390e606b5e7e6975d2232e2acd1b2c2b", kill_on_drop: false }`
[INFO] [stdout] dee9bf55d4a4237bde6a5afa9687992c390e606b5e7e6975d2232e2acd1b2c2b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 77f8b263c8f43c5f5d728cc3e4bf9a0f5ee981117a98cf415706b3779a515f8c
[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" "77f8b263c8f43c5f5d728cc3e4bf9a0f5ee981117a98cf415706b3779a515f8c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling autocfg v0.1.6
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.50
[INFO] [stderr]    Compiling bcc-sys v0.18.0
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking nix v0.18.0
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]    Compiling thiserror-impl v1.0.22
[INFO] [stderr]     Checking thiserror v1.0.22
[INFO] [stderr]     Checking bcc v0.0.31 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking ctrlc v3.1.7
[INFO] [stdout] warning: field is never read: `cpu`
[INFO] [stdout]  --> src/perf_event/perf_event_array.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     cpu: Option<usize>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `SoftwareEvent`
[INFO] [stdout]  --> examples/memory.rs:5:30
[INFO] [stdout]   |
[INFO] [stdout] 5 | use bcc::perf_event::{Event, SoftwareEvent};
[INFO] [stdout]   |                              ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `PerfEvent`
[INFO] [stdout]  --> examples/memory.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 | use bcc::{PerfEvent, PerfEventArray, BPF};
[INFO] [stdout]   |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `DEFAULT_SAMPLE_FREQ`
[INFO] [stdout]   --> examples/memory.rs:16:1
[INFO] [stdout]    |
[INFO] [stdout] 16 | const DEFAULT_SAMPLE_FREQ: u64 = 99; // Hertz
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `cpu`
[INFO] [stdout]  --> src/perf_event/perf_event_array.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     cpu: Option<usize>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 28.69s
[INFO] running `Command { std: "docker" "inspect" "77f8b263c8f43c5f5d728cc3e4bf9a0f5ee981117a98cf415706b3779a515f8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77f8b263c8f43c5f5d728cc3e4bf9a0f5ee981117a98cf415706b3779a515f8c", kill_on_drop: false }`
[INFO] [stdout] 77f8b263c8f43c5f5d728cc3e4bf9a0f5ee981117a98cf415706b3779a515f8c