[INFO] crate calculate 0.5.1 is already in cache
[INFO] testing calculate-0.5.1 against beta-2019-09-28 for beta-1.39-1
[INFO] extracting crate calculate 0.5.1 into work/builds/worker-1/source
[INFO] validating manifest of crates.io crate calculate 0.5.1 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 calculate 0.5.1
[INFO] finished tweaking crates.io crate calculate 0.5.1
[INFO] tweaked toml for crates.io crate calculate 0.5.1 written to work/builds/worker-1/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-1/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-1/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] fec78b18d3cb0c96d2bcc88edc2f98cb7ae015395747e374dfeefddfc7d070f0
[INFO] running `"docker" "start" "-a" "fec78b18d3cb0c96d2bcc88edc2f98cb7ae015395747e374dfeefddfc7d070f0"`
[INFO] [stderr]    Compiling numtoa v0.1.0
[INFO] [stderr]    Compiling bytecount v0.1.7
[INFO] [stderr]    Compiling ord_subset v3.1.1
[INFO] [stderr]    Compiling decimal v2.0.4
[INFO] [stderr]    Compiling termion v1.5.3
[INFO] [stderr]    Compiling liner v0.4.4
[INFO] [stderr]    Compiling calculate v0.5.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/bin.rs:104:21
[INFO] [stderr]     |
[INFO] [stderr] 104 |                 let mut lock = stdin.lock();
[INFO] [stderr]     |                     ----^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.45s
[INFO] running `"docker" "inspect" "fec78b18d3cb0c96d2bcc88edc2f98cb7ae015395747e374dfeefddfc7d070f0"`
[INFO] running `"docker" "rm" "-f" "fec78b18d3cb0c96d2bcc88edc2f98cb7ae015395747e374dfeefddfc7d070f0"`
[INFO] [stdout] fec78b18d3cb0c96d2bcc88edc2f98cb7ae015395747e374dfeefddfc7d070f0
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-1/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] 1ac7446c7ecf90d5cd2dc0a1accdf15fcba8d2f3fe30891246b716384523c301
[INFO] running `"docker" "start" "-a" "1ac7446c7ecf90d5cd2dc0a1accdf15fcba8d2f3fe30891246b716384523c301"`
[INFO] [stderr]    Compiling calculate v0.5.1 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:1:19
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![cfg_attr(test, feature(test))]
[INFO] [stderr]   |                   ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/bin.rs:104:21
[INFO] [stderr]     |
[INFO] [stderr] 104 |                 let mut lock = stdin.lock();
[INFO] [stderr]     |                     ----^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[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 `calculate`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "1ac7446c7ecf90d5cd2dc0a1accdf15fcba8d2f3fe30891246b716384523c301"`
[INFO] running `"docker" "rm" "-f" "1ac7446c7ecf90d5cd2dc0a1accdf15fcba8d2f3fe30891246b716384523c301"`
[INFO] [stdout] 1ac7446c7ecf90d5cd2dc0a1accdf15fcba8d2f3fe30891246b716384523c301