[INFO] updating cached repository japaric/xargo
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/japaric/xargo
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/japaric/xargo" "work/ex/beta-1.37-6/sources/1.36.0/gh/japaric/xargo"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/japaric/xargo'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/japaric/xargo" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/japaric/xargo"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/japaric/xargo'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8f8196820b815fc19dbb44449f8f44d5932a4bf6
[INFO] sha for GitHub repo japaric/xargo: 8f8196820b815fc19dbb44449f8f44d5932a4bf6
[INFO] validating manifest of japaric/xargo on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of japaric/xargo on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing japaric/xargo
[INFO] finished frobbing japaric/xargo
[INFO] frobbed toml for japaric/xargo written to work/ex/beta-1.37-6/sources/1.36.0/gh/japaric/xargo/Cargo.toml
[INFO] started frobbing japaric/xargo
[INFO] finished frobbing japaric/xargo
[INFO] frobbed toml for japaric/xargo written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/japaric/xargo/Cargo.toml
[INFO] crate japaric/xargo already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing japaric/xargo against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/japaric/xargo:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 8b4f97e8df3149abd05405d99e1afcdd76b4de9659ec303d4741a7e4eaa68e38
[INFO] running `"docker" "start" "-a" "8b4f97e8df3149abd05405d99e1afcdd76b4de9659ec303d4741a7e4eaa68e38"`
[INFO] [stderr]    Compiling xargo v0.3.14 (/opt/crater/workdir)
[INFO] [stderr]    Compiling dirs v1.0.4
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling serde_json v0.8.6
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling error-chain v0.7.2
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/flock.rs:142:11
[INFO] [stderr]     |
[INFO] [stderr] 142 |     try: &Fn() -> io::Result<()>,
[INFO] [stderr]     |           ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn() -> io::Result<()>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/flock.rs:143:13
[INFO] [stderr]     |
[INFO] [stderr] 143 |     block: &Fn() -> io::Result<()>,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn() -> io::Result<()>`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.90s
[INFO] running `"docker" "inspect" "8b4f97e8df3149abd05405d99e1afcdd76b4de9659ec303d4741a7e4eaa68e38"`
[INFO] running `"docker" "rm" "-f" "8b4f97e8df3149abd05405d99e1afcdd76b4de9659ec303d4741a7e4eaa68e38"`
[INFO] [stdout] 8b4f97e8df3149abd05405d99e1afcdd76b4de9659ec303d4741a7e4eaa68e38
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/japaric/xargo:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 373709f66b2e4b09a7531ac5665300f46e97fbcc50617e932244397a314ce02f
[INFO] running `"docker" "start" "-a" "373709f66b2e4b09a7531ac5665300f46e97fbcc50617e932244397a314ce02f"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling owning_ref v0.2.4
[INFO] [stderr]    Compiling thread-id v3.3.0
[INFO] [stderr]    Compiling parking_lot_core v0.2.14
[INFO] [stderr]    Compiling parking_lot v0.3.8
[INFO] [stderr]    Compiling xargo v0.3.14 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]  --> tests/smoke.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(const_fn)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/flock.rs:142:11
[INFO] [stderr]     |
[INFO] [stderr] 142 |     try: &Fn() -> io::Result<()>,
[INFO] [stderr]     |           ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn() -> io::Result<()>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/flock.rs:143:13
[INFO] [stderr]     |
[INFO] [stderr] 143 |     block: &Fn() -> io::Result<()>,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn() -> io::Result<()>`
[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 `xargo`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "373709f66b2e4b09a7531ac5665300f46e97fbcc50617e932244397a314ce02f"`
[INFO] running `"docker" "rm" "-f" "373709f66b2e4b09a7531ac5665300f46e97fbcc50617e932244397a314ce02f"`
[INFO] [stdout] 373709f66b2e4b09a7531ac5665300f46e97fbcc50617e932244397a314ce02f