[INFO] updating cached repository zapo/chelle
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/zapo/chelle
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/zapo/chelle" "work/ex/beta-1.38-1/sources/1.37.0/gh/zapo/chelle"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/zapo/chelle'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/zapo/chelle" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/zapo/chelle"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/zapo/chelle'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] fb600525708879df370311b0a77670cc3aeb1cb2
[INFO] sha for GitHub repo zapo/chelle: fb600525708879df370311b0a77670cc3aeb1cb2
[INFO] validating manifest of zapo/chelle 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 zapo/chelle 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 zapo/chelle
[INFO] finished frobbing zapo/chelle
[INFO] frobbed toml for zapo/chelle written to work/ex/beta-1.38-1/sources/1.37.0/gh/zapo/chelle/Cargo.toml
[INFO] started frobbing zapo/chelle
[INFO] finished frobbing zapo/chelle
[INFO] frobbed toml for zapo/chelle written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/zapo/chelle/Cargo.toml
[INFO] crate zapo/chelle 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing zapo/chelle 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/zapo/chelle:/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] 432f32918379028da721a5a3eb1b3bc1dfa44b0f9cd96a69c49eac3305dfd1f7
[INFO] running `"docker" "start" "-a" "432f32918379028da721a5a3eb1b3bc1dfa44b0f9cd96a69c49eac3305dfd1f7"`
[INFO] [stderr]    Compiling bitflags v0.4.0
[INFO] [stderr]    Compiling time v0.1.36
[INFO] [stderr]    Compiling nix v0.7.0
[INFO] [stderr]    Compiling chelle v0.1.0 (/opt/crater/workdir)
[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(slice_patterns)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::env::home_dir': This function's behavior is unexpected and probably not what you want. Consider using the home_dir function from https://crates.io/crates/dirs instead.
[INFO] [stderr]  --> src/builtins.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::env::home_dir;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::env::home_dir': This function's behavior is unexpected and probably not what you want. Consider using the home_dir function from https://crates.io/crates/dirs instead.
[INFO] [stderr]   --> src/builtins.rs:11:17
[INFO] [stderr]    |
[INFO] [stderr] 11 |         None => home_dir().unwrap()
[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 `chelle`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "432f32918379028da721a5a3eb1b3bc1dfa44b0f9cd96a69c49eac3305dfd1f7"`
[INFO] running `"docker" "rm" "-f" "432f32918379028da721a5a3eb1b3bc1dfa44b0f9cd96a69c49eac3305dfd1f7"`
[INFO] [stdout] 432f32918379028da721a5a3eb1b3bc1dfa44b0f9cd96a69c49eac3305dfd1f7