[INFO] crate bus_writer 0.1.2 is already in cache
[INFO] extracting crate bus_writer 0.1.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/bus_writer/0.1.2
[INFO] extracting crate bus_writer 0.1.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/bus_writer/0.1.2
[INFO] validating manifest of bus_writer-0.1.2 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 bus_writer-0.1.2 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 bus_writer-0.1.2
[INFO] finished frobbing bus_writer-0.1.2
[INFO] frobbed toml for bus_writer-0.1.2 written to work/ex/beta-1.38-1/sources/1.37.0/reg/bus_writer/0.1.2/Cargo.toml
[INFO] started frobbing bus_writer-0.1.2
[INFO] finished frobbing bus_writer-0.1.2
[INFO] frobbed toml for bus_writer-0.1.2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/bus_writer/0.1.2/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 bus_writer-0.1.2 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-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/bus_writer/0.1.2:/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] 6a98b64c9af714c6eb61948c73b7c04218788dca24479ba88e3a8663ba24948c
[INFO] running `"docker" "start" "-a" "6a98b64c9af714c6eb61948c73b7c04218788dca24479ba88e3a8663ba24948c"`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr]    Compiling atomic-option v0.1.2
[INFO] [stderr]    Compiling parking_lot_core v0.5.0
[INFO] [stderr]    Compiling bus v2.2.2
[INFO] [stderr]    Compiling bus_writer v0.1.2 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/writer.rs:100:22
[INFO] [stderr]     |
[INFO] [stderr] 100 |             for (id, mut device) in destinations.into_iter().enumerate() {
[INFO] [stderr]     |                      ----^^^^^^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/verifier.rs:100:22
[INFO] [stderr]     |
[INFO] [stderr] 100 |             for (id, mut device) in destinations.into_iter().enumerate() {
[INFO] [stderr]     |                      ----^^^^^^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.95s
[INFO] running `"docker" "inspect" "6a98b64c9af714c6eb61948c73b7c04218788dca24479ba88e3a8663ba24948c"`
[INFO] running `"docker" "rm" "-f" "6a98b64c9af714c6eb61948c73b7c04218788dca24479ba88e3a8663ba24948c"`
[INFO] [stdout] 6a98b64c9af714c6eb61948c73b7c04218788dca24479ba88e3a8663ba24948c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/bus_writer/0.1.2:/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] d1b423bf93b70dc26a4338f998e805bead694b7550ca5eefd1f259ad656acafd
[INFO] running `"docker" "start" "-a" "d1b423bf93b70dc26a4338f998e805bead694b7550ca5eefd1f259ad656acafd"`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr]    Compiling bus_writer v0.1.2 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `BufReader`
[INFO] [stderr]  --> examples/simple.rs:4:15
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::{BufReader, Cursor, Read};
[INFO] [stderr]   |               ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `File`
[INFO] [stderr]  --> examples/simple.rs:5:21
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::fs::{self, File};
[INFO] [stderr]   |                     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Read`
[INFO] [stderr]  --> examples/simple.rs:4:34
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::{BufReader, Cursor, Read};
[INFO] [stderr]   |                                  ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/writer.rs:100:22
[INFO] [stderr]     |
[INFO] [stderr] 100 |             for (id, mut device) in destinations.into_iter().enumerate() {
[INFO] [stderr]     |                      ----^^^^^^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/verifier.rs:100:22
[INFO] [stderr]     |
[INFO] [stderr] 100 |             for (id, mut device) in destinations.into_iter().enumerate() {
[INFO] [stderr]     |                      ----^^^^^^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.95s
[INFO] running `"docker" "inspect" "d1b423bf93b70dc26a4338f998e805bead694b7550ca5eefd1f259ad656acafd"`
[INFO] running `"docker" "rm" "-f" "d1b423bf93b70dc26a4338f998e805bead694b7550ca5eefd1f259ad656acafd"`
[INFO] [stdout] d1b423bf93b70dc26a4338f998e805bead694b7550ca5eefd1f259ad656acafd
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/bus_writer/0.1.2:/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" "test" "--frozen"`
[INFO] [stdout] 3c87b3275ac44654131e61f0be4e1a8f41210182d4fede3ed5cca7248d7a0f94
[INFO] running `"docker" "start" "-a" "3c87b3275ac44654131e61f0be4e1a8f41210182d4fede3ed5cca7248d7a0f94"`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/bus_writer-ad1af4a2f1f01679
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/writer-44acbd0de8da90b6
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] /tmp/h: 524288 bytes written
[INFO] [stdout] /tmp/h: 1048576 bytes written
[INFO] [stdout] /tmp/g: 524288 bytes written
[INFO] [stdout] /tmp/g: 1048576 bytes written
[INFO] [stdout] /tmp/b: 524288 bytes written
[INFO] [stdout] /tmp/a: 524288 bytes written
[INFO] [stdout] /tmp/b: 1048576 bytes written
[INFO] [stdout] /tmp/b: Completed
[INFO] [stdout] /tmp/a: 1048576 bytes written
[INFO] [stdout] /tmp/a: Completed
[INFO] [stdout] /tmp/h: Completed
[INFO] [stdout] /tmp/g: Completed
[INFO] [stdout] /tmp/f: 524288 bytes written
[INFO] [stdout] /tmp/f: 1048576 bytes written
[INFO] [stdout] /tmp/f: Completed
[INFO] [stdout] /tmp/e: 524288 bytes written
[INFO] [stdout] /tmp/e: 1048576 bytes written
[INFO] [stdout] /tmp/e: Completed
[INFO] [stdout] /tmp/d: 524288 bytes written
[INFO] [stdout] /tmp/d: 1048576 bytes written
[INFO] [stdout] /tmp/d: Completed
[INFO] [stdout] /tmp/c: 524288 bytes written
[INFO] [stdout] /tmp/c: 1048576 bytes written
[INFO] [stdout] /tmp/c: Completed
[INFO] [stdout] /tmp/f: 524288 bytes verified
[INFO] [stdout] /tmp/f: 1572864 bytes verified
[INFO] [stdout] /tmp/g: 524288 bytes verified
[INFO] [stdout] /tmp/g: 1572864 bytes verified
[INFO] [stdout] /tmp/f: Validated
[INFO] [stdout] /tmp/e: 524288 bytes verified
[INFO] [stdout] /tmp/e: 1572864 bytes verified
[INFO] [stdout] /tmp/e: Validated
[INFO] [stdout] /tmp/g: Validated
[INFO] [stdout] /tmp/d: 524288 bytes verified
[INFO] [stdout] /tmp/d: 1572864 bytes verified
[INFO] [stdout] /tmp/d: Validated
[INFO] [stdout] /tmp/a: 524288 bytes verified
[INFO] [stdout] /tmp/a: 1572864 bytes verified
[INFO] [stdout] /tmp/a: Validated
[INFO] [stdout] /tmp/b: 524288 bytes verified
[INFO] [stdout] /tmp/b: 1572864 bytes verified
[INFO] [stdout] /tmp/b: Validated
[INFO] [stdout] /tmp/h: 524288 bytes verified
[INFO] [stdout] /tmp/h: 1572864 bytes verified
[INFO] [stdout] /tmp/h: Validated
[INFO] [stdout] /tmp/c: 524288 bytes verified
[INFO] [stdout] /tmp/c: 1572864 bytes verified
[INFO] [stdout] /tmp/c: Validated
[INFO] [stdout] test eight_local_files ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests bus_writer
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "3c87b3275ac44654131e61f0be4e1a8f41210182d4fede3ed5cca7248d7a0f94"`
[INFO] running `"docker" "rm" "-f" "3c87b3275ac44654131e61f0be4e1a8f41210182d4fede3ed5cca7248d7a0f94"`
[INFO] [stdout] 3c87b3275ac44654131e61f0be4e1a8f41210182d4fede3ed5cca7248d7a0f94