[INFO] updating cached repository jfredett/synacor
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jfredett/synacor
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jfredett/synacor" "work/ex/beta-1.38-1/sources/1.37.0/gh/jfredett/synacor"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/jfredett/synacor'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jfredett/synacor" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jfredett/synacor"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jfredett/synacor'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c913dcb7075022f423ac8e42bd1e0c16f5fd1ac7
[INFO] sha for GitHub repo jfredett/synacor: c913dcb7075022f423ac8e42bd1e0c16f5fd1ac7
[INFO] validating manifest of jfredett/synacor 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 jfredett/synacor 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 jfredett/synacor
[INFO] finished frobbing jfredett/synacor
[INFO] frobbed toml for jfredett/synacor written to work/ex/beta-1.38-1/sources/1.37.0/gh/jfredett/synacor/Cargo.toml
[INFO] started frobbing jfredett/synacor
[INFO] finished frobbing jfredett/synacor
[INFO] frobbed toml for jfredett/synacor written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jfredett/synacor/Cargo.toml
[INFO] crate jfredett/synacor 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing jfredett/synacor 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-3/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/jfredett/synacor:/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] 4cd3bae08cca6e4cf0b4c4525f5ae0d63ac617de70fe0a83776cccd6f4c63d78
[INFO] running `"docker" "start" "-a" "4cd3bae08cca6e4cf0b4c4525f5ae0d63ac617de70fe0a83776cccd6f4c63d78"`
[INFO] [stderr]    Compiling atty v0.2.3
[INFO] [stderr]    Compiling clap v2.29.0
[INFO] [stderr]    Compiling synacor v0.1.0 (/opt/crater/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(try_from, const_fn)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
[INFO] [stderr]   --> src/address.rs:45:41
[INFO] [stderr]    |
[INFO] [stderr] 45 |             let v_res = u16::from_str(s.trim_left_matches("@"));
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^ help: replace the use of the deprecated item: `trim_start_matches`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` 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 `synacor`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "4cd3bae08cca6e4cf0b4c4525f5ae0d63ac617de70fe0a83776cccd6f4c63d78"`
[INFO] running `"docker" "rm" "-f" "4cd3bae08cca6e4cf0b4c4525f5ae0d63ac617de70fe0a83776cccd6f4c63d78"`
[INFO] [stdout] 4cd3bae08cca6e4cf0b4c4525f5ae0d63ac617de70fe0a83776cccd6f4c63d78