[INFO] updating cached repository rbalicki2/wasm-experiments
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/rbalicki2/wasm-experiments
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/rbalicki2/wasm-experiments" "work/ex/beta-1.38-1/sources/1.37.0/gh/rbalicki2/wasm-experiments"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/rbalicki2/wasm-experiments'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rbalicki2/wasm-experiments" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rbalicki2/wasm-experiments"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rbalicki2/wasm-experiments'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1b8f0f4f0a15881da2c1bb80441efbdd060176e4
[INFO] sha for GitHub repo rbalicki2/wasm-experiments: 1b8f0f4f0a15881da2c1bb80441efbdd060176e4
[INFO] validating manifest of rbalicki2/wasm-experiments 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 rbalicki2/wasm-experiments 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 rbalicki2/wasm-experiments
[INFO] finished frobbing rbalicki2/wasm-experiments
[INFO] frobbed toml for rbalicki2/wasm-experiments written to work/ex/beta-1.38-1/sources/1.37.0/gh/rbalicki2/wasm-experiments/Cargo.toml
[INFO] started frobbing rbalicki2/wasm-experiments
[INFO] finished frobbing rbalicki2/wasm-experiments
[INFO] frobbed toml for rbalicki2/wasm-experiments written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rbalicki2/wasm-experiments/Cargo.toml
[INFO] crate rbalicki2/wasm-experiments 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 rbalicki2/wasm-experiments 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-4/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/rbalicki2/wasm-experiments:/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] 7930d0c86cb61c546c42912b12d46f0191f9decbd11d172d14836c2e83d7a962
[INFO] running `"docker" "start" "-a" "7930d0c86cb61c546c42912b12d46f0191f9decbd11d172d14836c2e83d7a962"`
[INFO] [stderr]    Compiling serde_json v1.0.9
[INFO] [stderr]    Compiling stdweb v0.3.0
[INFO] [stderr]    Compiling wasm-minimal 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(libc)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]  --> src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | extern crate libc;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0554, E0658.
[INFO] [stderr] For more information about an error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `wasm-minimal`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "7930d0c86cb61c546c42912b12d46f0191f9decbd11d172d14836c2e83d7a962"`
[INFO] running `"docker" "rm" "-f" "7930d0c86cb61c546c42912b12d46f0191f9decbd11d172d14836c2e83d7a962"`
[INFO] [stdout] 7930d0c86cb61c546c42912b12d46f0191f9decbd11d172d14836c2e83d7a962