[INFO] fetching crate perfcnt 0.7.0...
[INFO] checking perfcnt-0.7.0 against try#7b3565da729099dbe807466fcd118fb2815986e0 for pr-81789
[INFO] extracting crate perfcnt 0.7.0 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate perfcnt 0.7.0 on toolchain 7b3565da729099dbe807466fcd118fb2815986e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-11/source/rust-toolchain
[INFO] started tweaking crates.io crate perfcnt 0.7.0
[INFO] finished tweaking crates.io crate perfcnt 0.7.0
[INFO] tweaked toml for crates.io crate perfcnt 0.7.0 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate crates.io crate perfcnt 0.7.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded raw-cpuid v8.1.0
[INFO] [stderr]   Downloaded x86 v0.34.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d9ed3abaa28f1e8fd78bdd8a88b56df0e325bb9e8431a7c66db2b7acd15f4766
[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" "d9ed3abaa28f1e8fd78bdd8a88b56df0e325bb9e8431a7c66db2b7acd15f4766", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d9ed3abaa28f1e8fd78bdd8a88b56df0e325bb9e8431a7c66db2b7acd15f4766", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9ed3abaa28f1e8fd78bdd8a88b56df0e325bb9e8431a7c66db2b7acd15f4766", kill_on_drop: false }`
[INFO] [stdout] d9ed3abaa28f1e8fd78bdd8a88b56df0e325bb9e8431a7c66db2b7acd15f4766
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1b621adc48ee87a5673ea2f357bcf8401832f74f84f9f7254a568c763dcbd73e
[INFO] running `Command { std: "docker" "start" "-a" "1b621adc48ee87a5673ea2f357bcf8401832f74f84f9f7254a568c763dcbd73e", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling serde v1.0.112
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling itoa v0.4.6
[INFO] [stderr]    Compiling serde_json v1.0.55
[INFO] [stderr]     Checking siphasher v0.3.3
[INFO] [stderr]     Checking bit_field v0.10.0
[INFO] [stderr]     Checking libc v0.1.12
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking phf_shared v0.7.24
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]     Checking phf_shared v0.8.0
[INFO] [stderr]     Checking phf v0.7.24
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking phf v0.8.0
[INFO] [stderr]     Checking nom v4.2.3
[INFO] [stderr]    Compiling csv-core v0.1.10
[INFO] [stderr]    Compiling raw-cpuid v8.1.0
[INFO] [stderr]    Compiling regex-automata v0.1.9
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking mmap v0.1.1
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]    Compiling bstr v0.2.13
[INFO] [stderr]    Compiling csv v1.1.3
[INFO] [stderr]    Compiling x86 v0.34.0
[INFO] [stderr]     Checking perfcnt v0.7.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `attributes`
[INFO] [stdout]    --> src/linux/mod.rs:751:5
[INFO] [stdout]     |
[INFO] [stdout] 751 |     attributes: perf_format::EventAttr,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `pc`
[INFO] [stdout]    --> src/linux/mod.rs:799:5
[INFO] [stdout]     |
[INFO] [stdout] 799 |     pc: PerfCounter,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `attributes`
[INFO] [stdout]    --> src/linux/mod.rs:751:5
[INFO] [stdout]     |
[INFO] [stdout] 751 |     attributes: perf_format::EventAttr,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `pc`
[INFO] [stdout]    --> src/linux/mod.rs:799:5
[INFO] [stdout]     |
[INFO] [stdout] 799 |     pc: PerfCounter,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 05s
[INFO] running `Command { std: "docker" "inspect" "1b621adc48ee87a5673ea2f357bcf8401832f74f84f9f7254a568c763dcbd73e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b621adc48ee87a5673ea2f357bcf8401832f74f84f9f7254a568c763dcbd73e", kill_on_drop: false }`
[INFO] [stdout] 1b621adc48ee87a5673ea2f357bcf8401832f74f84f9f7254a568c763dcbd73e