[INFO] updating cached repository chrisshyi/Karger-MinCut
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/chrisshyi/Karger-MinCut
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/chrisshyi/Karger-MinCut" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/chrisshyi/Karger-MinCut"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/chrisshyi/Karger-MinCut'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/chrisshyi/Karger-MinCut" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/chrisshyi/Karger-MinCut"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/chrisshyi/Karger-MinCut'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 042eb28c16ac6af3718886f51b62cd68380df0ef
[INFO] sha for GitHub repo chrisshyi/Karger-MinCut: 042eb28c16ac6af3718886f51b62cd68380df0ef
[INFO] validating manifest of chrisshyi/Karger-MinCut on toolchain master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of chrisshyi/Karger-MinCut on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing chrisshyi/Karger-MinCut
[INFO] finished frobbing chrisshyi/Karger-MinCut
[INFO] frobbed toml for chrisshyi/Karger-MinCut written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/chrisshyi/Karger-MinCut/Cargo.toml
[INFO] started frobbing chrisshyi/Karger-MinCut
[INFO] finished frobbing chrisshyi/Karger-MinCut
[INFO] frobbed toml for chrisshyi/Karger-MinCut written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/chrisshyi/Karger-MinCut/Cargo.toml
[INFO] crate chrisshyi/Karger-MinCut already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking chrisshyi/Karger-MinCut against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-5/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/chrisshyi/Karger-MinCut:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] a37a02d644db958c8a088ef075720e894d679b62eb4bf672a98b040a977f99bf
[INFO] running `"docker" "start" "-a" "a37a02d644db958c8a088ef075720e894d679b62eb4bf672a98b040a977f99bf"`
[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/crater/workdir)
[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 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: consider prefixing 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: consider prefixing 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: unused variable: `E`
[INFO] [stderr]    --> src/main.rs:128:17
[INFO] [stderr]     |
[INFO] [stderr] 128 |             Err(E) => panic!("line reading failure")
[INFO] [stderr]     |                 ^ help: consider prefixing 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: consider prefixing 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]     Finished dev [unoptimized + debuginfo] target(s) in 3.10s
[INFO] running `"docker" "inspect" "a37a02d644db958c8a088ef075720e894d679b62eb4bf672a98b040a977f99bf"`
[INFO] running `"docker" "rm" "-f" "a37a02d644db958c8a088ef075720e894d679b62eb4bf672a98b040a977f99bf"`
[INFO] [stdout] a37a02d644db958c8a088ef075720e894d679b62eb4bf672a98b040a977f99bf