[INFO] updating cached repository 3541/bt
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/3541/bt
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/3541/bt" "work/ex/beta-1.37-6/sources/1.36.0/gh/3541/bt"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/3541/bt'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/3541/bt" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/3541/bt"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/3541/bt'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5fd7a61201e34f1a7e0a9ea237cdc54f1129fb1f
[INFO] sha for GitHub repo 3541/bt: 5fd7a61201e34f1a7e0a9ea237cdc54f1129fb1f
[INFO] validating manifest of 3541/bt on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of 3541/bt on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing 3541/bt
[INFO] finished frobbing 3541/bt
[INFO] frobbed toml for 3541/bt written to work/ex/beta-1.37-6/sources/1.36.0/gh/3541/bt/Cargo.toml
[INFO] started frobbing 3541/bt
[INFO] finished frobbing 3541/bt
[INFO] frobbed toml for 3541/bt written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/3541/bt/Cargo.toml
[INFO] crate 3541/bt already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing 3541/bt against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/3541/bt:/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=warn" "-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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 89bc0295952a9a7577ec51b4604f2b1fa2615a24de5ecf45d21df9a10e041a7c
[INFO] running `"docker" "start" "-a" "89bc0295952a9a7577ec51b4604f2b1fa2615a24de5ecf45d21df9a10e041a7c"`
[INFO] [stderr]    Compiling bt v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(core_intrinsics)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> src/torrent/bencode/mod.rs:46:25
[INFO] [stderr]    |
[INFO] [stderr] 46 |                 x @ '0' ... '9' => { acc.push(x as char) },
[INFO] [stderr]    |                         ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(ellipsis_inclusive_range_patterns)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> src/torrent/bencode/mod.rs:82:21
[INFO] [stderr]    |
[INFO] [stderr] 82 |                 '0' ... '9' => { ret.push(match ByteString::from_string((&text[i..]).to_vec()) { Ok((x, n)) => { i += n; len += n; x }, Err(e) => { return Err(e) } }); },
[INFO] [stderr]    |                     ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/torrent/bencode/mod.rs:103:24
[INFO] [stderr]     |
[INFO] [stderr] 103 |             if let '0' ... '9' = text[i] as char {} else { return Err(format!("Malformed key field. Keys must be bencode strings. Unexpected character {:?}", text[i] as char)); }
[INFO] [stderr]     |                        ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/torrent/bencode/mod.rs:120:21
[INFO] [stderr]     |
[INFO] [stderr] 120 |                 '0' ... '9' => { match ByteString::from_string((&text[i..]).to_vec()) { Ok((x, n)) => { i += n; len += n; x}, Err(e) => { return Err(e) }, } },
[INFO] [stderr]     |                     ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/torrent/bencode/mod.rs:140:16
[INFO] [stderr]     |
[INFO] [stderr] 140 |     if let '0' ... '9' = text[0] as char {} else { return Err("Malformed number.".to_string()); }
[INFO] [stderr]     |                ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]    --> src/torrent/bencode/mod.rs:155:9
[INFO] [stderr]     |
[INFO] [stderr] 155 |     use super::*;
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fs::File`
[INFO] [stderr]    --> src/torrent/bencode/mod.rs:156:9
[INFO] [stderr]     |
[INFO] [stderr] 156 |     use std::fs::File;
[INFO] [stderr]     |         ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::prelude::*`
[INFO] [stderr]    --> src/torrent/bencode/mod.rs:157:9
[INFO] [stderr]     |
[INFO] [stderr] 157 |     use std::io::prelude::*;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/torrent/mod.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `bt`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "89bc0295952a9a7577ec51b4604f2b1fa2615a24de5ecf45d21df9a10e041a7c"`
[INFO] running `"docker" "rm" "-f" "89bc0295952a9a7577ec51b4604f2b1fa2615a24de5ecf45d21df9a10e041a7c"`
[INFO] [stdout] 89bc0295952a9a7577ec51b4604f2b1fa2615a24de5ecf45d21df9a10e041a7c