[INFO] fetching crate processortrace 0.0.3...
[INFO] checking processortrace-0.0.3 against try#9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c for pr-79472
[INFO] extracting crate processortrace 0.0.3 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate processortrace 0.0.3 on toolchain 9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate processortrace 0.0.3
[INFO] finished tweaking crates.io crate processortrace 0.0.3
[INFO] tweaked toml for crates.io crate processortrace 0.0.3 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded x86 v0.32.0
[INFO] [stderr]   Downloaded driverkit v0.3.0
[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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 014a4863f6ad5cee4395edd94ce8086c239bc561f9e3e5757d48931a6ec6490e
[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" "014a4863f6ad5cee4395edd94ce8086c239bc561f9e3e5757d48931a6ec6490e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "014a4863f6ad5cee4395edd94ce8086c239bc561f9e3e5757d48931a6ec6490e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "014a4863f6ad5cee4395edd94ce8086c239bc561f9e3e5757d48931a6ec6490e", kill_on_drop: false }`
[INFO] [stdout] 014a4863f6ad5cee4395edd94ce8086c239bc561f9e3e5757d48931a6ec6490e
[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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c" "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] 766aababe9cafcc1380eb2767c145f37ed9730f1e6eaf3af697410de8c4f2f1d
[INFO] running `Command { std: "docker" "start" "-a" "766aababe9cafcc1380eb2767c145f37ed9730f1e6eaf3af697410de8c4f2f1d", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]    Compiling x86 v0.32.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking bit_field v0.10.1
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking libc v0.1.12
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking bit_field v0.9.0
[INFO] [stderr]     Checking rlibc v1.0.0
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking nix v0.19.1
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]    Compiling raw-cpuid v7.0.3
[INFO] [stderr]     Checking mmap v0.1.1
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]     Checking driverkit v0.3.0
[INFO] [stderr]     Checking processortrace v0.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/tests.rs:50:13
[INFO] [stdout]    |
[INFO] [stdout] 50 |         let mut a = 0;
[INFO] [stdout]    |             ----^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` 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 22.31s
[INFO] running `Command { std: "docker" "inspect" "766aababe9cafcc1380eb2767c145f37ed9730f1e6eaf3af697410de8c4f2f1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "766aababe9cafcc1380eb2767c145f37ed9730f1e6eaf3af697410de8c4f2f1d", kill_on_drop: false }`
[INFO] [stdout] 766aababe9cafcc1380eb2767c145f37ed9730f1e6eaf3af697410de8c4f2f1d