[INFO] updating cached repository rocurley/rectangle
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/rocurley/rectangle
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/rocurley/rectangle" "work/ex/beta-1.38-1/sources/1.37.0/gh/rocurley/rectangle"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/rocurley/rectangle'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rocurley/rectangle" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rocurley/rectangle"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rocurley/rectangle'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 59ea61e9037cacd274d73fa5344a5bd6f331cdc5
[INFO] sha for GitHub repo rocurley/rectangle: 59ea61e9037cacd274d73fa5344a5bd6f331cdc5
[INFO] validating manifest of rocurley/rectangle 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 rocurley/rectangle 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 rocurley/rectangle
[INFO] finished frobbing rocurley/rectangle
[INFO] frobbed toml for rocurley/rectangle written to work/ex/beta-1.38-1/sources/1.37.0/gh/rocurley/rectangle/Cargo.toml
[INFO] started frobbing rocurley/rectangle
[INFO] finished frobbing rocurley/rectangle
[INFO] frobbed toml for rocurley/rectangle written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rocurley/rectangle/Cargo.toml
[INFO] crate rocurley/rectangle 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 rocurley/rectangle against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rocurley/rectangle:/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 0806a5f983fdd1459e3ac48c6100a3e61cb151a7b818e91ebdcb69bb1263dbe3
[INFO] running `"docker" "start" "-a" "0806a5f983fdd1459e3ac48c6100a3e61cb151a7b818e91ebdcb69bb1263dbe3"`
[INFO] [stderr]    Compiling gcc v0.3.53
[INFO] [stderr]    Compiling libc v0.2.30
[INFO] [stderr]    Compiling matrixmultiply v0.1.13
[INFO] [stderr]    Compiling ndarray v0.10.5
[INFO] [stderr]    Compiling either v1.1.0
[INFO] [stderr]    Compiling ascii v0.8.6
[INFO] [stderr]    Compiling fnv v1.0.5
[INFO] [stderr]    Compiling num-complex v0.1.40
[INFO] [stderr]    Compiling itertools v0.6.2
[INFO] [stderr]    Compiling term_size v0.3.0
[INFO] [stderr]    Compiling time v0.1.38
[INFO] [stderr]    Compiling atty v0.2.2
[INFO] [stderr]    Compiling textwrap v0.7.0
[INFO] [stderr]    Compiling clap v2.26.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.12
[INFO] [stderr]    Compiling pbr v1.0.0
[INFO] [stderr]    Compiling backtrace v0.2.3
[INFO] [stderr]    Compiling error-chain v0.5.0
[INFO] [stderr]    Compiling cpuprofiler v0.0.3
[INFO] [stderr]    Compiling rectangle 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:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(conservative_impl_trait)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[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(ascii_ctype)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ascii::AsciiExt`
[INFO] [stderr]  --> src/main.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::ascii::AsciiExt;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::ascii::AsciiExt': use inherent methods instead
[INFO] [stderr]  --> src/main.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::ascii::AsciiExt;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `is_ascii_lowercase` found for type `&std::string::String` in the current scope
[INFO] [stderr]   --> src/main.rs:57:12
[INFO] [stderr]    |
[INFO] [stderr] 57 |       word.is_ascii_lowercase() &&
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^ help: there is a method with a similar name: `to_ascii_lowercase`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0554, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `rectangle`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "0806a5f983fdd1459e3ac48c6100a3e61cb151a7b818e91ebdcb69bb1263dbe3"`
[INFO] running `"docker" "rm" "-f" "0806a5f983fdd1459e3ac48c6100a3e61cb151a7b818e91ebdcb69bb1263dbe3"`
[INFO] [stdout] 0806a5f983fdd1459e3ac48c6100a3e61cb151a7b818e91ebdcb69bb1263dbe3