[INFO] crate strscan 0.1.1 is already in cache
[INFO] testing strscan-0.1.1 against beta-2019-09-28 for beta-1.39-1
[INFO] extracting crate strscan 0.1.1 into work/builds/worker-10/source
[INFO] validating manifest of crates.io crate strscan 0.1.1 on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate strscan 0.1.1
[INFO] finished tweaking crates.io crate strscan 0.1.1
[INFO] tweaked toml for crates.io crate strscan 0.1.1 written to work/builds/worker-10/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-10/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 865c73e895cff150f5ad3473a5db54f6f35b2cfc1980a4daa80f64b133a6ac01
[INFO] running `"docker" "start" "-a" "865c73e895cff150f5ad3473a5db54f6f35b2cfc1980a4daa80f64b133a6ac01"`
[INFO] [stderr]    Compiling strscan v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(collections)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `slice_chars` found for type `&str` in the current scope
[INFO] [stderr]   --> src/strscan.rs:95:19
[INFO] [stderr]    |
[INFO] [stderr] 95 |         Some(rest.slice_chars(0, len))
[INFO] [stderr]    |                   ^^^^^^^^^^^ method not found in `&str`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `slice_chars` found for type `&str` in the current scope
[INFO] [stderr]    --> src/strscan.rs:113:24
[INFO] [stderr]     |
[INFO] [stderr] 113 |         let chr = rest.slice_chars(0, 1);
[INFO] [stderr]     |                        ^^^^^^^^^^^ method not found in `&str`
[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 `strscan`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "865c73e895cff150f5ad3473a5db54f6f35b2cfc1980a4daa80f64b133a6ac01"`
[INFO] running `"docker" "rm" "-f" "865c73e895cff150f5ad3473a5db54f6f35b2cfc1980a4daa80f64b133a6ac01"`
[INFO] [stdout] 865c73e895cff150f5ad3473a5db54f6f35b2cfc1980a4daa80f64b133a6ac01