[INFO] updating cached repository archer884/Compress
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/archer884/Compress
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/archer884/Compress" "work/ex/beta-1.38-1/sources/1.37.0/gh/archer884/Compress"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/archer884/Compress'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/archer884/Compress" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/archer884/Compress"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/archer884/Compress'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cf7b6f83b844669f977dbfa51cffb29c4f1a5618
[INFO] sha for GitHub repo archer884/Compress: cf7b6f83b844669f977dbfa51cffb29c4f1a5618
[INFO] validating manifest of archer884/Compress on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of archer884/Compress on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing archer884/Compress
[INFO] finished frobbing archer884/Compress
[INFO] frobbed toml for archer884/Compress written to work/ex/beta-1.38-1/sources/1.37.0/gh/archer884/Compress/Cargo.toml
[INFO] started frobbing archer884/Compress
[INFO] finished frobbing archer884/Compress
[INFO] frobbed toml for archer884/Compress written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/archer884/Compress/Cargo.toml
[INFO] crate archer884/Compress already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/archer884/Compress/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "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 `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "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] testing archer884/Compress against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/archer884/Compress:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 9dc2e9e02b1ae2f242f98a1c50df7a2f73d4935e242f5d2c9773266b411cd24e
[INFO] running `"docker" "start" "-a" "9dc2e9e02b1ae2f242f98a1c50df7a2f73d4935e242f5d2c9773266b411cd24e"`
[INFO] [stderr]    Compiling bzip2-sys v0.1.7
[INFO] [stderr]    Compiling bzip2 v0.3.3
[INFO] [stderr]    Compiling compress v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0432]: unresolved import `bzip2::reader`
[INFO] [stderr]  --> src/main.rs:6:12
[INFO] [stderr]   |
[INFO] [stderr] 6 | use bzip2::reader::BzCompressor;
[INFO] [stderr]   |            ^^^^^^ could not find `reader` in `bzip2`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(env, fs, io, path)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `description` found for type `std::io::Error` in the current scope
[INFO] [stderr]   --> src/main.rs:27:38
[INFO] [stderr]    |
[INFO] [stderr] 27 |                     println!("{}", e.description());
[INFO] [stderr]    |                                      ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: items from traits can only be used if the trait is in scope
[INFO] [stderr] help: the following trait is implemented but not in scope, perhaps add a `use` for it:
[INFO] [stderr]    |
[INFO] [stderr] 5  | use std::error::Error;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no associated item named `Best` found for type `bzip2::Compress` in the current scope
[INFO] [stderr]   --> src/main.rs:49:50
[INFO] [stderr]    |
[INFO] [stderr] 49 |         &mut BzCompressor::new(reader, Compress::Best), 
[INFO] [stderr]    |                                                  ^^^^ associated item not found in `bzip2::Compress`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0554, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `compress`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "9dc2e9e02b1ae2f242f98a1c50df7a2f73d4935e242f5d2c9773266b411cd24e"`
[INFO] running `"docker" "rm" "-f" "9dc2e9e02b1ae2f242f98a1c50df7a2f73d4935e242f5d2c9773266b411cd24e"`
[INFO] [stdout] 9dc2e9e02b1ae2f242f98a1c50df7a2f73d4935e242f5d2c9773266b411cd24e