[INFO] crate xargo 0.3.14 is already in cache
[INFO] extracting crate xargo 0.3.14 into work/ex/beta-1.38-1/sources/1.37.0/reg/xargo/0.3.14
[INFO] extracting crate xargo 0.3.14 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/xargo/0.3.14
[INFO] validating manifest of xargo-0.3.14 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 xargo-0.3.14 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 xargo-0.3.14
[INFO] finished frobbing xargo-0.3.14
[INFO] frobbed toml for xargo-0.3.14 written to work/ex/beta-1.38-1/sources/1.37.0/reg/xargo/0.3.14/Cargo.toml
[INFO] started frobbing xargo-0.3.14
[INFO] finished frobbing xargo-0.3.14
[INFO] frobbed toml for xargo-0.3.14 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/xargo/0.3.14/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 xargo-0.3.14 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/xargo/0.3.14:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] a6846fecd6b57d96bde25873898d56b1cab84695f9a1bc75428166f6db36a864
[INFO] running `"docker" "start" "-a" "a6846fecd6b57d96bde25873898d56b1cab84695f9a1bc75428166f6db36a864"`
[INFO] [stderr]    Compiling same-file v0.1.3
[INFO] [stderr]    Compiling xargo v0.3.14 (/opt/crater/workdir)
[INFO] [stderr]    Compiling toml v0.2.1
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling serde_json v0.8.6
[INFO] [stderr]    Compiling error-chain v0.7.2
[INFO] [stderr]    Compiling walkdir v1.0.7
[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 5.80s
[INFO] running `"docker" "inspect" "a6846fecd6b57d96bde25873898d56b1cab84695f9a1bc75428166f6db36a864"`
[INFO] running `"docker" "rm" "-f" "a6846fecd6b57d96bde25873898d56b1cab84695f9a1bc75428166f6db36a864"`
[INFO] [stdout] a6846fecd6b57d96bde25873898d56b1cab84695f9a1bc75428166f6db36a864
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/xargo/0.3.14:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 466d40c6cb275c66d92ae30a986d38a8f4ad06ee5042c3985a5f162553eb3ee3
[INFO] running `"docker" "start" "-a" "466d40c6cb275c66d92ae30a986d38a8f4ad06ee5042c3985a5f162553eb3ee3"`
[INFO] [stderr]    Compiling owning_ref v0.2.4
[INFO] [stderr]    Compiling thread-id v3.3.0
[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 stable 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" "466d40c6cb275c66d92ae30a986d38a8f4ad06ee5042c3985a5f162553eb3ee3"`
[INFO] running `"docker" "rm" "-f" "466d40c6cb275c66d92ae30a986d38a8f4ad06ee5042c3985a5f162553eb3ee3"`
[INFO] [stdout] 466d40c6cb275c66d92ae30a986d38a8f4ad06ee5042c3985a5f162553eb3ee3