[INFO] updating cached repository https://github.com/wismer/rs_torrent
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b5209285c8f76a2d44e128239d0b79fb81d93081
[INFO] checking wismer/rs_torrent against try#b19afc12c4f781e95f168f2fdea339c972f14ae2 for pr-64327
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwismer%2Frs_torrent" "work/builds/worker-4/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wismer/rs_torrent on toolchain b19afc12c4f781e95f168f2fdea339c972f14ae2-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+b19afc12c4f781e95f168f2fdea339c972f14ae2-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/wismer/rs_torrent
[INFO] finished tweaking git repo https://github.com/wismer/rs_torrent
[INFO] tweaked toml for git repo https://github.com/wismer/rs_torrent written to work/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/wismer/rs_torrent already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+b19afc12c4f781e95f168f2fdea339c972f14ae2-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+b19afc12c4f781e95f168f2fdea339c972f14ae2-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] aa74ddb53732c4643b446ee54c7fd02ddbf49c4f64bc9fc28a8f439efcb3308f
[INFO] running `"docker" "start" "-a" "aa74ddb53732c4643b446ee54c7fd02ddbf49c4f64bc9fc28a8f439efcb3308f"`
[INFO] [stderr]     Checking byteorder v1.2.4
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking rand v0.4.3
[INFO] [stderr]     Checking crossbeam-utils v0.3.2
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking log v0.4.4
[INFO] [stderr]     Checking uuid v0.6.5
[INFO] [stderr]     Checking tokio-executor v0.1.3
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[INFO] [stderr]     Checking crossbeam-epoch v0.4.3
[INFO] [stderr]     Checking bytes v0.4.9
[INFO] [stderr]     Checking tokio-timer v0.2.5
[INFO] [stderr]     Checking backtrace v0.3.9
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[INFO] [stderr]     Checking mio v0.6.15
[INFO] [stderr]     Checking error-chain v0.11.0
[INFO] [stderr]     Checking crossbeam-deque v0.3.1
[INFO] [stderr]     Checking bip_bencode v0.4.4
[INFO] [stderr]     Checking tokio-io v0.1.7
[INFO] [stderr]     Checking http v0.1.10
[INFO] [stderr]     Checking tokio-threadpool v0.1.5
[INFO] [stderr]     Checking tokio-codec v0.1.0
[INFO] [stderr]     Checking tokio-reactor v0.1.3
[INFO] [stderr]     Checking tokio-tcp v0.1.1
[INFO] [stderr]     Checking tokio-udp v0.1.1
[INFO] [stderr]     Checking tokio-fs v0.1.3
[INFO] [stderr]     Checking tokio v0.1.7
[INFO] [stderr]     Checking h2 v0.1.12
[INFO] [stderr]     Checking hyper v0.12.8
[INFO] [stderr]     Checking rs_bittorrent v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `torrent`
[INFO] [stderr]   --> src/main.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |     let torrent = Torrent::new(&torrent_content);
[INFO] [stderr]    |         ^^^^^^^ help: consider prefixing with an underscore: `_torrent`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `announce_list`
[INFO] [stderr]   --> src/torrent/torrent.rs:34:13
[INFO] [stderr]    |
[INFO] [stderr] 34 |         let announce_list = dict.lookup(b"announce-list").unwrap();
[INFO] [stderr]    |             ^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_announce_list`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `torrent`
[INFO] [stderr]   --> src/main.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |     let torrent = Torrent::new(&torrent_content);
[INFO] [stderr]    |         ^^^^^^^ help: consider prefixing with an underscore: `_torrent`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `announce_list`
[INFO] [stderr]   --> src/torrent/torrent.rs:34:13
[INFO] [stderr]    |
[INFO] [stderr] 34 |         let announce_list = dict.lookup(b"announce-list").unwrap();
[INFO] [stderr]    |             ^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_announce_list`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `tracker_query_params`
[INFO] [stderr]   --> src/torrent/torrent.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 |     fn tracker_query_params(&self) -> Option<String> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:33:5
[INFO] [stderr]    |
[INFO] [stderr] 33 |     torrent_file.read_to_end(&mut contents);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `tracker_query_params`
[INFO] [stderr]   --> src/torrent/torrent.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 |     fn tracker_query_params(&self) -> Option<String> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:33:5
[INFO] [stderr]    |
[INFO] [stderr] 33 |     torrent_file.read_to_end(&mut contents);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.59s
[INFO] running `"docker" "inspect" "aa74ddb53732c4643b446ee54c7fd02ddbf49c4f64bc9fc28a8f439efcb3308f"`
[INFO] running `"docker" "rm" "-f" "aa74ddb53732c4643b446ee54c7fd02ddbf49c4f64bc9fc28a8f439efcb3308f"`
[INFO] [stdout] aa74ddb53732c4643b446ee54c7fd02ddbf49c4f64bc9fc28a8f439efcb3308f