[INFO] crate rusturn 0.0.3 is already in cache
[INFO] extracting crate rusturn 0.0.3 into work/ex/beta-1.38-1/sources/1.37.0/reg/rusturn/0.0.3
[INFO] extracting crate rusturn 0.0.3 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rusturn/0.0.3
[INFO] validating manifest of rusturn-0.0.3 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 rusturn-0.0.3 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 rusturn-0.0.3
[INFO] finished frobbing rusturn-0.0.3
[INFO] frobbed toml for rusturn-0.0.3 written to work/ex/beta-1.38-1/sources/1.37.0/reg/rusturn/0.0.3/Cargo.toml
[INFO] started frobbing rusturn-0.0.3
[INFO] finished frobbing rusturn-0.0.3
[INFO] frobbed toml for rusturn-0.0.3 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rusturn/0.0.3/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 rusturn-0.0.3 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/rusturn/0.0.3:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 176298fd213088d6cb5b48a6c552160ca1248f7c498d1df7df49ffd526f05c2d
[INFO] running `"docker" "start" "-a" "176298fd213088d6cb5b48a6c552160ca1248f7c498d1df7df49ffd526f05c2d"`
[INFO] [stderr]    Compiling nbchan v0.1.3
[INFO] [stderr]    Compiling splay_tree v0.2.10
[INFO] [stderr]    Compiling factory v0.1.2
[INFO] [stderr]    Compiling md5 v0.6.1
[INFO] [stderr]    Compiling hmac-sha1 v0.1.3
[INFO] [stderr]    Compiling trackable_derive v0.1.2
[INFO] [stderr]    Compiling fibers v0.1.12
[INFO] [stderr]    Compiling trackable v0.2.23
[INFO] [stderr]    Compiling bytecodec v0.4.11
[INFO] [stderr]    Compiling fibers_timeout_queue v0.1.0
[INFO] [stderr]    Compiling stun_codec v0.1.12
[INFO] [stderr]    Compiling fibers_transport v0.1.2
[INFO] [stderr]    Compiling rustun v0.3.5
[INFO] [stderr]    Compiling rusturn v0.0.3 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/client/allocate.rs:88:21
[INFO] [stderr]    |
[INFO] [stderr] 88 |                 let mut client = ClientCore::new(
[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]     Finished dev [unoptimized + debuginfo] target(s) in 22.78s
[INFO] running `"docker" "inspect" "176298fd213088d6cb5b48a6c552160ca1248f7c498d1df7df49ffd526f05c2d"`
[INFO] running `"docker" "rm" "-f" "176298fd213088d6cb5b48a6c552160ca1248f7c498d1df7df49ffd526f05c2d"`
[INFO] [stdout] 176298fd213088d6cb5b48a6c552160ca1248f7c498d1df7df49ffd526f05c2d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/rusturn/0.0.3:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] bcb22e92d49152b67a953045dbc12fa0102ccfb65eaf414652ba0bccfd4381f0
[INFO] running `"docker" "start" "-a" "bcb22e92d49152b67a953045dbc12fa0102ccfb65eaf414652ba0bccfd4381f0"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling fibers_global v0.1.2
[INFO] [stderr]    Compiling rusturn v0.0.3 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/client/allocate.rs:88:21
[INFO] [stderr]    |
[INFO] [stderr] 88 |                 let mut client = ClientCore::new(
[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]     Finished dev [unoptimized + debuginfo] target(s) in 16.89s
[INFO] running `"docker" "inspect" "bcb22e92d49152b67a953045dbc12fa0102ccfb65eaf414652ba0bccfd4381f0"`
[INFO] running `"docker" "rm" "-f" "bcb22e92d49152b67a953045dbc12fa0102ccfb65eaf414652ba0bccfd4381f0"`
[INFO] [stdout] bcb22e92d49152b67a953045dbc12fa0102ccfb65eaf414652ba0bccfd4381f0
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/rusturn/0.0.3:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] aed6f2337fa060ba42e630e1620e4f3675c25eb866242a288c9c5ab76c59eae6
[INFO] running `"docker" "start" "-a" "aed6f2337fa060ba42e630e1620e4f3675c25eb866242a288c9c5ab76c59eae6"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.13s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rusturn-b3e22af08a868a2f
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::it_works ... 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 rusturn
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs -  (line 5) ... 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" "aed6f2337fa060ba42e630e1620e4f3675c25eb866242a288c9c5ab76c59eae6"`
[INFO] running `"docker" "rm" "-f" "aed6f2337fa060ba42e630e1620e4f3675c25eb866242a288c9c5ab76c59eae6"`
[INFO] [stdout] aed6f2337fa060ba42e630e1620e4f3675c25eb866242a288c9c5ab76c59eae6