[INFO] updating cached repository menski/random-stream-server
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/menski/random-stream-server
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/menski/random-stream-server" "work/ex/beta-1.38-1/sources/1.37.0/gh/menski/random-stream-server"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/menski/random-stream-server'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/menski/random-stream-server" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/menski/random-stream-server"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/menski/random-stream-server'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a0fa5c59a8d1d1c97a225ef0419b7e9a87155f39
[INFO] sha for GitHub repo menski/random-stream-server: a0fa5c59a8d1d1c97a225ef0419b7e9a87155f39
[INFO] validating manifest of menski/random-stream-server 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 menski/random-stream-server 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 menski/random-stream-server
[INFO] finished frobbing menski/random-stream-server
[INFO] frobbed toml for menski/random-stream-server written to work/ex/beta-1.38-1/sources/1.37.0/gh/menski/random-stream-server/Cargo.toml
[INFO] started frobbing menski/random-stream-server
[INFO] finished frobbing menski/random-stream-server
[INFO] frobbed toml for menski/random-stream-server written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/menski/random-stream-server/Cargo.toml
[INFO] crate menski/random-stream-server already has a lockfile, it will not be regenerated
[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 menski/random-stream-server 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-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/menski/random-stream-server:/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] 992ccdbcb3b4e15a089b7408899d211fb73e1e2313e108004d6bc6eadc81dd1d
[INFO] running `"docker" "start" "-a" "992ccdbcb3b4e15a089b7408899d211fb73e1e2313e108004d6bc6eadc81dd1d"`
[INFO] [stderr]    Compiling rand v0.5.1
[INFO] [stderr]    Compiling random-stream-server v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:114:16
[INFO] [stderr]     |
[INFO] [stderr] 114 |             Ok(mut stream) => {
[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 5.25s
[INFO] running `"docker" "inspect" "992ccdbcb3b4e15a089b7408899d211fb73e1e2313e108004d6bc6eadc81dd1d"`
[INFO] running `"docker" "rm" "-f" "992ccdbcb3b4e15a089b7408899d211fb73e1e2313e108004d6bc6eadc81dd1d"`
[INFO] [stdout] 992ccdbcb3b4e15a089b7408899d211fb73e1e2313e108004d6bc6eadc81dd1d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/menski/random-stream-server:/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] fafbd851e3e7e89914b7eb1bbe48499c897539ebe470cbb0f8018e4959f2e51a
[INFO] running `"docker" "start" "-a" "fafbd851e3e7e89914b7eb1bbe48499c897539ebe470cbb0f8018e4959f2e51a"`
[INFO] [stderr]    Compiling random-stream-server v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:114:16
[INFO] [stderr]     |
[INFO] [stderr] 114 |             Ok(mut stream) => {
[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 0.79s
[INFO] running `"docker" "inspect" "fafbd851e3e7e89914b7eb1bbe48499c897539ebe470cbb0f8018e4959f2e51a"`
[INFO] running `"docker" "rm" "-f" "fafbd851e3e7e89914b7eb1bbe48499c897539ebe470cbb0f8018e4959f2e51a"`
[INFO] [stdout] fafbd851e3e7e89914b7eb1bbe48499c897539ebe470cbb0f8018e4959f2e51a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/menski/random-stream-server:/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] a12e734e5e52a7a4d0ff20bbd3511486016841b1096e75fac6be11f216dd5bf0
[INFO] running `"docker" "start" "-a" "a12e734e5e52a7a4d0ff20bbd3511486016841b1096e75fac6be11f216dd5bf0"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/random_stream_server-0ee42adfd876b8ec
[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" "a12e734e5e52a7a4d0ff20bbd3511486016841b1096e75fac6be11f216dd5bf0"`
[INFO] running `"docker" "rm" "-f" "a12e734e5e52a7a4d0ff20bbd3511486016841b1096e75fac6be11f216dd5bf0"`
[INFO] [stdout] a12e734e5e52a7a4d0ff20bbd3511486016841b1096e75fac6be11f216dd5bf0