[INFO] cloning 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" "clone" "--bare" "https://github.com/chrisshyi/Karger-MinCut" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchrisshyi%2FKarger-MinCut", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchrisshyi%2FKarger-MinCut'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 042eb28c16ac6af3718886f51b62cd68380df0ef
[INFO] checking chrisshyi/Karger-MinCut against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchrisshyi%2FKarger-MinCut" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/chrisshyi/Karger-MinCut on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "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-6/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" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rand_core v0.1.0-pre.0
[INFO] [stderr]   Downloaded rand v0.5.0-pre.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aaa44138836abc7d3a695707fe0bee4746a5c0876764a54ffcbaaa92441bd304
[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" "aaa44138836abc7d3a695707fe0bee4746a5c0876764a54ffcbaaa92441bd304", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aaa44138836abc7d3a695707fe0bee4746a5c0876764a54ffcbaaa92441bd304", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aaa44138836abc7d3a695707fe0bee4746a5c0876764a54ffcbaaa92441bd304", kill_on_drop: false }`
[INFO] [stdout] aaa44138836abc7d3a695707fe0bee4746a5c0876764a54ffcbaaa92441bd304
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "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] bb15d1dbfab9b2fda8ace6910b80e62161cdcf1790f5f45316100b06177ede77
[INFO] running `Command { std: "docker" "start" "-a" "bb15d1dbfab9b2fda8ace6910b80e62161cdcf1790f5f45316100b06177ede77", kill_on_drop: false }`
[INFO] [stderr]     Checking rand_core v0.1.0-pre.0
[INFO] [stderr]     Checking rand v0.5.0-pre.0
[INFO] [stderr]     Checking 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] [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 3.12s
[INFO] running `Command { std: "docker" "inspect" "bb15d1dbfab9b2fda8ace6910b80e62161cdcf1790f5f45316100b06177ede77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb15d1dbfab9b2fda8ace6910b80e62161cdcf1790f5f45316100b06177ede77", kill_on_drop: false }`
[INFO] [stdout] bb15d1dbfab9b2fda8ace6910b80e62161cdcf1790f5f45316100b06177ede77