[INFO] updating cached repository rklaehn/interval-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/rklaehn/interval-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/rklaehn/interval-rs" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/rklaehn/interval-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/rklaehn/interval-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rklaehn/interval-rs" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/rklaehn/interval-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/rklaehn/interval-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 129e628c534a307cdb2dfa8aabaeeb97574daf83
[INFO] sha for GitHub repo rklaehn/interval-rs: 129e628c534a307cdb2dfa8aabaeeb97574daf83
[INFO] validating manifest of rklaehn/interval-rs 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 rklaehn/interval-rs 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 rklaehn/interval-rs
[INFO] finished frobbing rklaehn/interval-rs
[INFO] frobbed toml for rklaehn/interval-rs written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/rklaehn/interval-rs/Cargo.toml
[INFO] started frobbing rklaehn/interval-rs
[INFO] finished frobbing rklaehn/interval-rs
[INFO] frobbed toml for rklaehn/interval-rs written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/rklaehn/interval-rs/Cargo.toml
[INFO] crate rklaehn/interval-rs 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 rklaehn/interval-rs against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-0/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/rklaehn/interval-rs:/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] 7d1c1f7629b8d6a058753c3a347caaf16a08a29f8fa6a8ef2cda5df00584a81a
[INFO] running `"docker" "start" "-a" "7d1c1f7629b8d6a058753c3a347caaf16a08a29f8fa6a8ef2cda5df00584a81a"`
[INFO] [stderr]     Checking rand_pcg v0.1.1
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]     Checking intervalset v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr] warning: unused import: `self`
[INFO] [stderr]  --> src/lib.rs:5:15
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::io::{self, BufRead};
[INFO] [stderr]   |               ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `BufRead`
[INFO] [stderr]  --> src/lib.rs:5:21
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::io::{self, BufRead};
[INFO] [stderr]   |                     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::slice`
[INFO] [stderr]   --> src/interval_seq.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::slice::*;
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Checking quickcheck v0.8.0
[INFO] [stderr] warning: unused import: `self`
[INFO] [stderr]  --> src/lib.rs:5:15
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::io::{self, BufRead};
[INFO] [stderr]   |               ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `BufRead`
[INFO] [stderr]  --> src/lib.rs:5:21
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::io::{self, BufRead};
[INFO] [stderr]   |                     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::slice`
[INFO] [stderr]   --> src/interval_seq.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::slice::*;
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_valid`
[INFO] [stderr]    --> src/interval.rs:152:5
[INFO] [stderr]     |
[INFO] [stderr] 152 |     fn is_valid(self: Interval<T>) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.50s
[INFO] running `"docker" "inspect" "7d1c1f7629b8d6a058753c3a347caaf16a08a29f8fa6a8ef2cda5df00584a81a"`
[INFO] running `"docker" "rm" "-f" "7d1c1f7629b8d6a058753c3a347caaf16a08a29f8fa6a8ef2cda5df00584a81a"`
[INFO] [stdout] 7d1c1f7629b8d6a058753c3a347caaf16a08a29f8fa6a8ef2cda5df00584a81a