[INFO] updating cached repository https://github.com/chrisshyi/Karger-MinCut
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 042eb28c16ac6af3718886f51b62cd68380df0ef
[INFO] testing chrisshyi/Karger-MinCut against beta-2020-07-24 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchrisshyi%2FKarger-MinCut" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/chrisshyi/Karger-MinCut on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/chrisshyi/Karger-MinCut
[INFO] finished tweaking git repo https://github.com/chrisshyi/Karger-MinCut
[INFO] tweaked toml for git repo https://github.com/chrisshyi/Karger-MinCut written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/chrisshyi/Karger-MinCut already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 84928eb9a07667cee93a30f34bc54eb8f602e5edeae96243be83c0e103c96751
[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" "84928eb9a07667cee93a30f34bc54eb8f602e5edeae96243be83c0e103c96751", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "84928eb9a07667cee93a30f34bc54eb8f602e5edeae96243be83c0e103c96751", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "84928eb9a07667cee93a30f34bc54eb8f602e5edeae96243be83c0e103c96751", kill_on_drop: false }`
[INFO] [stdout] 84928eb9a07667cee93a30f34bc54eb8f602e5edeae96243be83c0e103c96751
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 77e0bf6fdd9f244a14d1756eec43907b8d6c30243d91a63b745380d2b5778f1c
[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" "77e0bf6fdd9f244a14d1756eec43907b8d6c30243d91a63b745380d2b5778f1c", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_core v0.1.0-pre.0
[INFO] [stderr]    Compiling rand v0.5.0-pre.0
[INFO] [stderr]    Compiling karger-min-cut v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `thread_rng`
[INFO] [stdout]  --> src/main.rs:2:48
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::HashMap; use rand::{Rng, thread_rng};
[INFO] [stdout]   |                                                ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `E`
[INFO] [stdout]    --> src/main.rs:128:17
[INFO] [stdout]     |
[INFO] [stdout] 128 |             Err(E) => panic!("line reading failure")
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_E`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num_vertx`
[INFO] [stdout]    --> src/main.rs:159:9
[INFO] [stdout]     |
[INFO] [stdout] 159 |     let num_vertx: f64 = active_vertx.len() as f64;
[INFO] [stdout]     |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_vertx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `E` should have a snake case name
[INFO] [stdout]    --> src/main.rs:128:17
[INFO] [stdout]     |
[INFO] [stdout] 128 |             Err(E) => panic!("line reading failure")
[INFO] [stdout]     |                 ^ help: convert the identifier to snake case: `e`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.74s
[INFO] running `Command { std: "docker" "inspect" "77e0bf6fdd9f244a14d1756eec43907b8d6c30243d91a63b745380d2b5778f1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77e0bf6fdd9f244a14d1756eec43907b8d6c30243d91a63b745380d2b5778f1c", kill_on_drop: false }`
[INFO] [stdout] 77e0bf6fdd9f244a14d1756eec43907b8d6c30243d91a63b745380d2b5778f1c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 13eab16328f70b42eeda8ff4a8dea6490693ba1bee126a412aaacb7ae299538c
[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" "13eab16328f70b42eeda8ff4a8dea6490693ba1bee126a412aaacb7ae299538c", kill_on_drop: false }`
[INFO] [stderr]    Compiling karger-min-cut v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `thread_rng`
[INFO] [stdout]  --> src/main.rs:2:48
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::HashMap; use rand::{Rng, thread_rng};
[INFO] [stdout]   |                                                ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `E`
[INFO] [stdout]    --> src/main.rs:128:17
[INFO] [stdout]     |
[INFO] [stdout] 128 |             Err(E) => panic!("line reading failure")
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_E`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num_vertx`
[INFO] [stdout]    --> src/main.rs:159:9
[INFO] [stdout]     |
[INFO] [stdout] 159 |     let num_vertx: f64 = active_vertx.len() as f64;
[INFO] [stdout]     |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_vertx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `E` should have a snake case name
[INFO] [stdout]    --> src/main.rs:128:17
[INFO] [stdout]     |
[INFO] [stdout] 128 |             Err(E) => panic!("line reading failure")
[INFO] [stdout]     |                 ^ help: convert the identifier to snake case: `e`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "13eab16328f70b42eeda8ff4a8dea6490693ba1bee126a412aaacb7ae299538c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13eab16328f70b42eeda8ff4a8dea6490693ba1bee126a412aaacb7ae299538c", kill_on_drop: false }`
[INFO] [stdout] 13eab16328f70b42eeda8ff4a8dea6490693ba1bee126a412aaacb7ae299538c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ead7e5fab642ccedef781b8019be943a50d555fa505ab35ab7e8211e5ad7075c
[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" "ead7e5fab642ccedef781b8019be943a50d555fa505ab35ab7e8211e5ad7075c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused import: `thread_rng`
[INFO] [stderr]  --> src/main.rs:2:48
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::HashMap; use rand::{Rng, thread_rng};
[INFO] [stderr]   |                                                ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `E`
[INFO] [stderr]    --> src/main.rs:128:17
[INFO] [stderr]     |
[INFO] [stderr] 128 |             Err(E) => panic!("line reading failure")
[INFO] [stderr]     |                 ^ help: if this is intentional, prefix it with an underscore: `_E`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `num_vertx`
[INFO] [stderr]    --> src/main.rs:159:9
[INFO] [stderr]     |
[INFO] [stderr] 159 |     let num_vertx: f64 = active_vertx.len() as f64;
[INFO] [stderr]     |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_vertx`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `E` should have a snake case name
[INFO] [stderr]    --> src/main.rs:128:17
[INFO] [stderr]     |
[INFO] [stderr] 128 |             Err(E) => panic!("line reading failure")
[INFO] [stderr]     |                 ^ help: convert the identifier to snake case: `e`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/karger_min_cut-ece93fdeab3c560a
[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
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "ead7e5fab642ccedef781b8019be943a50d555fa505ab35ab7e8211e5ad7075c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ead7e5fab642ccedef781b8019be943a50d555fa505ab35ab7e8211e5ad7075c", kill_on_drop: false }`
[INFO] [stdout] ead7e5fab642ccedef781b8019be943a50d555fa505ab35ab7e8211e5ad7075c