[INFO] crate rustsync 0.2.3 is already in cache
[INFO] extracting crate rustsync 0.2.3 into work/ex/beta-1.38-1/sources/1.37.0/reg/rustsync/0.2.3
[INFO] extracting crate rustsync 0.2.3 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rustsync/0.2.3
[INFO] validating manifest of rustsync-0.2.3 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 rustsync-0.2.3 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 rustsync-0.2.3
[INFO] finished frobbing rustsync-0.2.3
[INFO] frobbed toml for rustsync-0.2.3 written to work/ex/beta-1.38-1/sources/1.37.0/reg/rustsync/0.2.3/Cargo.toml
[INFO] started frobbing rustsync-0.2.3
[INFO] finished frobbing rustsync-0.2.3
[INFO] frobbed toml for rustsync-0.2.3 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rustsync/0.2.3/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 rustsync-0.2.3 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-6/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/rustsync/0.2.3:/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] 0b27cbe65952893b7ad4e325453071a4878de355b70e06b6121c34cb3823a697
[INFO] running `"docker" "start" "-a" "0b27cbe65952893b7ad4e325453071a4878de355b70e06b6121c34cb3823a697"`
[INFO] [stderr]    Compiling blake2-rfc v0.2.18
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling tokio-io v0.1.12
[INFO] [stderr]    Compiling rustsync v0.2.3 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:243:41
[INFO] [stderr]     |
[INFO] [stderr] 243 |                 if let Async::Ready((r, mut block, len)) = reading.poll()? {
[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/lib.rs:430:29
[INFO] [stderr]     |
[INFO] [stderr] 430 |                         let mut hash = adler32::RollingAdler32::from_buffer(&block.as_ref()[..len]);
[INFO] [stderr]     |                             ----^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.28s
[INFO] running `"docker" "inspect" "0b27cbe65952893b7ad4e325453071a4878de355b70e06b6121c34cb3823a697"`
[INFO] running `"docker" "rm" "-f" "0b27cbe65952893b7ad4e325453071a4878de355b70e06b6121c34cb3823a697"`
[INFO] [stdout] 0b27cbe65952893b7ad4e325453071a4878de355b70e06b6121c34cb3823a697
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/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/rustsync/0.2.3:/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] b722b20d6da11531e4f9556e6dc07b78fec3700c88fa4442a7a1361decc14d01
[INFO] running `"docker" "start" "-a" "b722b20d6da11531e4f9556e6dc07b78fec3700c88fa4442a7a1361decc14d01"`
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling tokio-codec v0.1.1
[INFO] [stderr]    Compiling tokio-reactor v0.1.9
[INFO] [stderr]    Compiling tokio-fs v0.1.6
[INFO] [stderr]    Compiling tokio-uds v0.2.5
[INFO] [stderr]    Compiling tokio-udp v0.1.3
[INFO] [stderr]    Compiling tokio-tcp v0.1.3
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling tokio-core v0.1.17
[INFO] [stderr]    Compiling rustsync v0.2.3 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:243:41
[INFO] [stderr]     |
[INFO] [stderr] 243 |                 if let Async::Ready((r, mut block, len)) = reading.poll()? {
[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/lib.rs:430:29
[INFO] [stderr]     |
[INFO] [stderr] 430 |                         let mut hash = adler32::RollingAdler32::from_buffer(&block.as_ref()[..len]);
[INFO] [stderr]     |                             ----^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.23s
[INFO] running `"docker" "inspect" "b722b20d6da11531e4f9556e6dc07b78fec3700c88fa4442a7a1361decc14d01"`
[INFO] running `"docker" "rm" "-f" "b722b20d6da11531e4f9556e6dc07b78fec3700c88fa4442a7a1361decc14d01"`
[INFO] [stdout] b722b20d6da11531e4f9556e6dc07b78fec3700c88fa4442a7a1361decc14d01
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/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/rustsync/0.2.3:/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] 96854e80b98d4f7b183e60b32942876d7527a8d77d25a77bdf2f9a3668e87018
[INFO] running `"docker" "start" "-a" "96854e80b98d4f7b183e60b32942876d7527a8d77d25a77bdf2f9a3668e87018"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.16s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rustsync-9de07bbae252ab74
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::futures ... ok
[INFO] [stdout] test tests::basic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rustsync
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs -  (line 4) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "96854e80b98d4f7b183e60b32942876d7527a8d77d25a77bdf2f9a3668e87018"`
[INFO] running `"docker" "rm" "-f" "96854e80b98d4f7b183e60b32942876d7527a8d77d25a77bdf2f9a3668e87018"`
[INFO] [stdout] 96854e80b98d4f7b183e60b32942876d7527a8d77d25a77bdf2f9a3668e87018