[INFO] crate skylane 0.1.2 is already in cache
[INFO] extracting crate skylane 0.1.2 into work/ex/beta-1.37-6/sources/1.36.0/reg/skylane/0.1.2
[INFO] extracting crate skylane 0.1.2 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/skylane/0.1.2
[INFO] validating manifest of skylane-0.1.2 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 skylane-0.1.2 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 skylane-0.1.2
[INFO] finished frobbing skylane-0.1.2
[INFO] frobbed toml for skylane-0.1.2 written to work/ex/beta-1.37-6/sources/1.36.0/reg/skylane/0.1.2/Cargo.toml
[INFO] started frobbing skylane-0.1.2
[INFO] finished frobbing skylane-0.1.2
[INFO] frobbed toml for skylane-0.1.2 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/skylane/0.1.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 skylane-0.1.2 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/skylane/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 861b12c7b10e89dc62822be467ee0123e96c8b120a6a11eb67238bc8ec3295b3
[INFO] running `"docker" "start" "-a" "861b12c7b10e89dc62822be467ee0123e96c8b120a6a11eb67238bc8ec3295b3"`
[INFO] [stderr]    Compiling skylane v0.1.2 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/connection.rs:201:22
[INFO] [stderr]     |
[INFO] [stderr] 201 |                      mut bytes_buf: &mut Cursor<&[u8]>,
[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/connection.rs:202:22
[INFO] [stderr]     |
[INFO] [stderr] 202 |                      mut fds_buf: &mut Cursor<&[u8]>)
[INFO] [stderr]     |                      ----^^^^^^^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.96s
[INFO] running `"docker" "inspect" "861b12c7b10e89dc62822be467ee0123e96c8b120a6a11eb67238bc8ec3295b3"`
[INFO] running `"docker" "rm" "-f" "861b12c7b10e89dc62822be467ee0123e96c8b120a6a11eb67238bc8ec3295b3"`
[INFO] [stdout] 861b12c7b10e89dc62822be467ee0123e96c8b120a6a11eb67238bc8ec3295b3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/skylane/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 0438f01f1e62c67abf5b9e8f6a0164a5ba46d9de945e1c8141f07d4ddbc21079
[INFO] running `"docker" "start" "-a" "0438f01f1e62c67abf5b9e8f6a0164a5ba46d9de945e1c8141f07d4ddbc21079"`
[INFO] [stderr]    Compiling skylane v0.1.2 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/connection.rs:201:22
[INFO] [stderr]     |
[INFO] [stderr] 201 |                      mut bytes_buf: &mut Cursor<&[u8]>,
[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/connection.rs:202:22
[INFO] [stderr]     |
[INFO] [stderr] 202 |                      mut fds_buf: &mut Cursor<&[u8]>)
[INFO] [stderr]     |                      ----^^^^^^^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.75s
[INFO] running `"docker" "inspect" "0438f01f1e62c67abf5b9e8f6a0164a5ba46d9de945e1c8141f07d4ddbc21079"`
[INFO] running `"docker" "rm" "-f" "0438f01f1e62c67abf5b9e8f6a0164a5ba46d9de945e1c8141f07d4ddbc21079"`
[INFO] [stdout] 0438f01f1e62c67abf5b9e8f6a0164a5ba46d9de945e1c8141f07d4ddbc21079
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/skylane/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 399fd37a4c2da5ee890a088f8772a453bb60f391992709c4feb3b9acdc21c145
[INFO] running `"docker" "start" "-a" "399fd37a4c2da5ee890a088f8772a453bb60f391992709c4feb3b9acdc21c145"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/skylane-547b0120bf78e3ad
[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]    Doc-tests skylane
[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" "399fd37a4c2da5ee890a088f8772a453bb60f391992709c4feb3b9acdc21c145"`
[INFO] running `"docker" "rm" "-f" "399fd37a4c2da5ee890a088f8772a453bb60f391992709c4feb3b9acdc21c145"`
[INFO] [stdout] 399fd37a4c2da5ee890a088f8772a453bb60f391992709c4feb3b9acdc21c145