[INFO] updating cached repository dat2/cryptopals-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/dat2/cryptopals-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/dat2/cryptopals-rust" "work/ex/beta-1.37-6/sources/1.36.0/gh/dat2/cryptopals-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/dat2/cryptopals-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dat2/cryptopals-rust" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/dat2/cryptopals-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/dat2/cryptopals-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 85f821c00f4edd3810631ae7f5f9aa4b77862aff
[INFO] sha for GitHub repo dat2/cryptopals-rust: 85f821c00f4edd3810631ae7f5f9aa4b77862aff
[INFO] validating manifest of dat2/cryptopals-rust 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 dat2/cryptopals-rust 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 dat2/cryptopals-rust
[INFO] finished frobbing dat2/cryptopals-rust
[INFO] frobbed toml for dat2/cryptopals-rust written to work/ex/beta-1.37-6/sources/1.36.0/gh/dat2/cryptopals-rust/Cargo.toml
[INFO] started frobbing dat2/cryptopals-rust
[INFO] finished frobbing dat2/cryptopals-rust
[INFO] frobbed toml for dat2/cryptopals-rust written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/dat2/cryptopals-rust/Cargo.toml
[INFO] crate dat2/cryptopals-rust 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 dat2/cryptopals-rust against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/dat2/cryptopals-rust:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 20bb21280b4303cc0de283b33de6c0ec96da1c62faefcf77c8df4f51a3ab3606
[INFO] running `"docker" "start" "-a" "20bb21280b4303cc0de283b33de6c0ec96da1c62faefcf77c8df4f51a3ab3606"`
[INFO] [stderr]    Compiling itertools v0.6.3
[INFO] [stderr]    Compiling atty v0.2.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.14
[INFO] [stderr]    Compiling openssl v0.9.19
[INFO] [stderr]    Compiling backtrace v0.3.3
[INFO] [stderr]    Compiling clap v2.26.2
[INFO] [stderr]    Compiling error-chain v0.11.0
[INFO] [stderr]    Compiling cryptopals-rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(ascii_ctype)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(iterator_step_by)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::ascii::AsciiExt': use inherent methods instead
[INFO] [stderr]  --> src/set1.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::ascii::AsciiExt;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/errors.rs:1:1
[INFO] [stderr]    |
[INFO] [stderr] 1  | / error_chain! {
[INFO] [stderr] 2  | |   foreign_links {
[INFO] [stderr] 3  | |     Io(::std::io::Error);
[INFO] [stderr] 4  | |     OpenSsl(::openssl::error::ErrorStack);
[INFO] [stderr] ...  |
[INFO] [stderr] 35 | |   }
[INFO] [stderr] 36 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ascii::AsciiExt`
[INFO] [stderr]  --> src/set1.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::ascii::AsciiExt;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `cryptopals-rust`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "20bb21280b4303cc0de283b33de6c0ec96da1c62faefcf77c8df4f51a3ab3606"`
[INFO] running `"docker" "rm" "-f" "20bb21280b4303cc0de283b33de6c0ec96da1c62faefcf77c8df4f51a3ab3606"`
[INFO] [stdout] 20bb21280b4303cc0de283b33de6c0ec96da1c62faefcf77c8df4f51a3ab3606