[INFO] fetching crate scavenger 1.7.6...
[INFO] extracting crate scavenger 1.7.6 into work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/reg/scavenger/1.7.6
[INFO] extracting crate scavenger 1.7.6 into work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/reg/scavenger/1.7.6
[INFO] validating manifest of scavenger-1.7.6 on toolchain master#c8865d8e195813ade6b84434ac9f8850e7112d1a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of scavenger-1.7.6 on toolchain try#e212b7d492c96d3837691ba29d32d5f468933fb8
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing scavenger-1.7.6
[INFO] finished frobbing scavenger-1.7.6
[INFO] frobbed toml for scavenger-1.7.6 written to work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/reg/scavenger/1.7.6/Cargo.toml
[INFO] started frobbing scavenger-1.7.6
[INFO] finished frobbing scavenger-1.7.6
[INFO] frobbed toml for scavenger-1.7.6 written to work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/reg/scavenger/1.7.6/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] building scavenger-1.7.6 against try#e212b7d492c96d3837691ba29d32d5f468933fb8 for pr-61629
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-6/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/reg/scavenger/1.7.6:/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=forbid" "-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" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "build" "--frozen"`
[INFO] [stdout] 62667f42d03919e809fe8920894a6adee4201a464628e2c75634b5c1d777fac3
[INFO] running `"docker" "start" "-a" "62667f42d03919e809fe8920894a6adee4201a464628e2c75634b5c1d777fac3"`
[INFO] [stderr]    Compiling scavenger v1.7.6 (/opt/crater/workdir)
[INFO] [stderr]    Compiling core_affinity v0.5.9
[INFO] [stderr]    Compiling clap v2.30.0
[INFO] [stderr]    Compiling aligned_alloc v0.1.3
[INFO] [stderr]    Compiling ct-logs v0.5.1
[INFO] [stderr]    Compiling flate2 v1.0.7
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling serde_yaml v0.8.9
[INFO] [stderr]    Compiling serde-value v0.5.3
[INFO] [stderr]    Compiling stopwatch v0.0.7
[INFO] [stderr]    Compiling mio v0.6.19
[INFO] [stderr]    Compiling tokio-io v0.1.12
[INFO] [stderr]    Compiling tokio-threadpool v0.1.14
[INFO] [stderr]    Compiling want v0.0.6
[INFO] [stderr]    Compiling rustls v0.15.2
[INFO] [stderr]    Compiling cookie_store v0.7.0
[INFO] [stderr]    Compiling log4rs v0.8.3
[INFO] [stderr]    Compiling tokio-codec v0.1.1
[INFO] [stderr]    Compiling h2 v0.1.23
[INFO] [stderr]    Compiling tokio-fs v0.1.6
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling tokio-reactor v0.1.9
[INFO] [stderr]    Compiling tokio-uds v0.2.5
[INFO] [stderr]    Compiling tokio-tcp v0.1.3
[INFO] [stderr]    Compiling tokio-udp v0.1.3
[INFO] [stderr]    Compiling tokio v0.1.21
[INFO] [stderr]    Compiling tokio-rustls v0.9.3
[INFO] [stderr]    Compiling hyper v0.12.29
[INFO] [stderr]    Compiling hyper-rustls v0.16.1
[INFO] [stderr]    Compiling reqwest v0.9.18
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/cpu_worker.rs:67:34
[INFO] [stderr]    |
[INFO] [stderr] 67 |     tx_empty_buffers: Sender<Box<Buffer + Send>>,
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^ help: use `dyn`: `dyn Buffer + Send`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/cpu_worker.rs:86:34
[INFO] [stderr]    |
[INFO] [stderr] 86 |     tx_empty_buffers: Sender<Box<Buffer + Send>>,
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^ help: use `dyn`: `dyn Buffer + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/miner.rs:305:51
[INFO] [stderr]     |
[INFO] [stderr] 305 |                 .send(Box::new(cpu_buffer) as Box<Buffer + Send>)
[INFO] [stderr]     |                                                   ^^^^^^^^^^^^^ help: use `dyn`: `dyn Buffer + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/plot.rs:97:90
[INFO] [stderr]    |
[INFO] [stderr] 97 |     pub fn new(path: &PathBuf, mut use_direct_io: bool, dummy: bool) -> Result<Plot, Box<Error>> {
[INFO] [stderr]    |                                                                                          ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/reader.rs:26:21
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub buffer: Box<Buffer + Send>,
[INFO] [stderr]    |                     ^^^^^^^^^^^^^ help: use `dyn`: `dyn Buffer + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/reader.rs:35:36
[INFO] [stderr]    |
[INFO] [stderr] 35 |     rx_empty_buffers: Receiver<Box<Buffer + Send>>,
[INFO] [stderr]    |                                    ^^^^^^^^^^^^^ help: use `dyn`: `dyn Buffer + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/reader.rs:36:34
[INFO] [stderr]    |
[INFO] [stderr] 36 |     tx_empty_buffers: Sender<Box<Buffer + Send>>,
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^ help: use `dyn`: `dyn Buffer + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/reader.rs:49:40
[INFO] [stderr]    |
[INFO] [stderr] 49 |         rx_empty_buffers: Receiver<Box<Buffer + Send>>,
[INFO] [stderr]    |                                        ^^^^^^^^^^^^^ help: use `dyn`: `dyn Buffer + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/reader.rs:50:38
[INFO] [stderr]    |
[INFO] [stderr] 50 |         tx_empty_buffers: Sender<Box<Buffer + Send>>,
[INFO] [stderr]    |                                      ^^^^^^^^^^^^^ help: use `dyn`: `dyn Buffer + Send`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 36s
[INFO] running `"docker" "inspect" "62667f42d03919e809fe8920894a6adee4201a464628e2c75634b5c1d777fac3"`
[INFO] running `"docker" "rm" "-f" "62667f42d03919e809fe8920894a6adee4201a464628e2c75634b5c1d777fac3"`
[INFO] [stdout] 62667f42d03919e809fe8920894a6adee4201a464628e2c75634b5c1d777fac3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-6/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/reg/scavenger/1.7.6:/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=forbid" "-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" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] e26ad239f00ec58562936be08101515cc82838cceb84ecb7d0fa9edbdf6babfd
[INFO] running `"docker" "start" "-a" "e26ad239f00ec58562936be08101515cc82838cceb84ecb7d0fa9edbdf6babfd"`
[INFO] [stderr]    Compiling scavenger v1.7.6 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/cpu_worker.rs:67:34
[INFO] [stderr]    |
[INFO] [stderr] 67 |     tx_empty_buffers: Sender<Box<Buffer + Send>>,
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^ help: use `dyn`: `dyn Buffer + Send`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/cpu_worker.rs:86:34
[INFO] [stderr]    |
[INFO] [stderr] 86 |     tx_empty_buffers: Sender<Box<Buffer + Send>>,
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^ help: use `dyn`: `dyn Buffer + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/miner.rs:305:51
[INFO] [stderr]     |
[INFO] [stderr] 305 |                 .send(Box::new(cpu_buffer) as Box<Buffer + Send>)
[INFO] [stderr]     |                                                   ^^^^^^^^^^^^^ help: use `dyn`: `dyn Buffer + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/plot.rs:97:90
[INFO] [stderr]    |
[INFO] [stderr] 97 |     pub fn new(path: &PathBuf, mut use_direct_io: bool, dummy: bool) -> Result<Plot, Box<Error>> {
[INFO] [stderr]    |                                                                                          ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/reader.rs:26:21
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub buffer: Box<Buffer + Send>,
[INFO] [stderr]    |                     ^^^^^^^^^^^^^ help: use `dyn`: `dyn Buffer + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/reader.rs:35:36
[INFO] [stderr]    |
[INFO] [stderr] 35 |     rx_empty_buffers: Receiver<Box<Buffer + Send>>,
[INFO] [stderr]    |                                    ^^^^^^^^^^^^^ help: use `dyn`: `dyn Buffer + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/reader.rs:36:34
[INFO] [stderr]    |
[INFO] [stderr] 36 |     tx_empty_buffers: Sender<Box<Buffer + Send>>,
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^ help: use `dyn`: `dyn Buffer + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/reader.rs:49:40
[INFO] [stderr]    |
[INFO] [stderr] 49 |         rx_empty_buffers: Receiver<Box<Buffer + Send>>,
[INFO] [stderr]    |                                        ^^^^^^^^^^^^^ help: use `dyn`: `dyn Buffer + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/reader.rs:50:38
[INFO] [stderr]    |
[INFO] [stderr] 50 |         tx_empty_buffers: Sender<Box<Buffer + Send>>,
[INFO] [stderr]    |                                      ^^^^^^^^^^^^^ help: use `dyn`: `dyn Buffer + Send`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.42s
[INFO] running `"docker" "inspect" "e26ad239f00ec58562936be08101515cc82838cceb84ecb7d0fa9edbdf6babfd"`
[INFO] running `"docker" "rm" "-f" "e26ad239f00ec58562936be08101515cc82838cceb84ecb7d0fa9edbdf6babfd"`
[INFO] [stdout] e26ad239f00ec58562936be08101515cc82838cceb84ecb7d0fa9edbdf6babfd