[INFO] fetching crate perftacho 0.4.2...
[INFO] testing perftacho-0.4.2 against 1.55.0 for beta-1.56-1
[INFO] extracting crate perftacho 0.4.2 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate perftacho 0.4.2 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate perftacho 0.4.2
[INFO] finished tweaking crates.io crate perftacho 0.4.2
[INFO] tweaked toml for crates.io crate perftacho 0.4.2 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate crates.io crate perftacho 0.4.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2c42bab6257d10671d4d7030d4f677f09acacebf256ae3bd58e11833c35399a0
[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" "2c42bab6257d10671d4d7030d4f677f09acacebf256ae3bd58e11833c35399a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2c42bab6257d10671d4d7030d4f677f09acacebf256ae3bd58e11833c35399a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c42bab6257d10671d4d7030d4f677f09acacebf256ae3bd58e11833c35399a0", kill_on_drop: false }`
[INFO] [stdout] 2c42bab6257d10671d4d7030d4f677f09acacebf256ae3bd58e11833c35399a0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2200aaac77ab1b3a7d0fbcef4103f654bbf69b5b294fcd6cc183315a522d800c
[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" "2200aaac77ab1b3a7d0fbcef4103f654bbf69b5b294fcd6cc183315a522d800c", kill_on_drop: false }`
[INFO] [stderr]    Compiling regex-syntax v0.6.16
[INFO] [stderr]    Compiling linked-hash-map v0.5.2
[INFO] [stderr]    Compiling yaml-rust v0.4.3
[INFO] [stderr]    Compiling regex v1.3.4
[INFO] [stderr]    Compiling perftacho v0.4.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/process/mod.rs:72:25
[INFO] [stdout]    |
[INFO] [stdout] 72 |         Err(e) => Err(e.description().to_owned()),
[INFO] [stdout]    |                         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` 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 13.46s
[INFO] running `Command { std: "docker" "inspect" "2200aaac77ab1b3a7d0fbcef4103f654bbf69b5b294fcd6cc183315a522d800c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2200aaac77ab1b3a7d0fbcef4103f654bbf69b5b294fcd6cc183315a522d800c", kill_on_drop: false }`
[INFO] [stdout] 2200aaac77ab1b3a7d0fbcef4103f654bbf69b5b294fcd6cc183315a522d800c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 88f30a29eac9b16e438ab11bff8a85010705226f2e6086bd2144a29b75441978
[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" "88f30a29eac9b16e438ab11bff8a85010705226f2e6086bd2144a29b75441978", kill_on_drop: false }`
[INFO] [stderr]    Compiling perftacho v0.4.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/process/mod.rs:72:25
[INFO] [stdout]    |
[INFO] [stdout] 72 |         Err(e) => Err(e.description().to_owned()),
[INFO] [stdout]    |                         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.88s
[INFO] running `Command { std: "docker" "inspect" "88f30a29eac9b16e438ab11bff8a85010705226f2e6086bd2144a29b75441978", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88f30a29eac9b16e438ab11bff8a85010705226f2e6086bd2144a29b75441978", kill_on_drop: false }`
[INFO] [stdout] 88f30a29eac9b16e438ab11bff8a85010705226f2e6086bd2144a29b75441978
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] db28abb648e044598c7217354d53f457c10be512ee2d8f20a83d0ef1ea3bad66
[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" "db28abb648e044598c7217354d53f457c10be512ee2d8f20a83d0ef1ea3bad66", kill_on_drop: false }`
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> src/process/mod.rs:72:25
[INFO] [stderr]    |
[INFO] [stderr] 72 |         Err(e) => Err(e.description().to_owned()),
[INFO] [stderr]    |                         ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `perftacho` (bin "perftacho" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/perftacho-9395d9b99a2b8f01)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "db28abb648e044598c7217354d53f457c10be512ee2d8f20a83d0ef1ea3bad66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db28abb648e044598c7217354d53f457c10be512ee2d8f20a83d0ef1ea3bad66", kill_on_drop: false }`
[INFO] [stdout] db28abb648e044598c7217354d53f457c10be512ee2d8f20a83d0ef1ea3bad66