[INFO] updating cached repository mitoma/rust_simple_http_server
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mitoma/rust_simple_http_server
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mitoma/rust_simple_http_server" "work/ex/beta-1.38-1/sources/1.37.0/gh/mitoma/rust_simple_http_server"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/mitoma/rust_simple_http_server'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mitoma/rust_simple_http_server" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mitoma/rust_simple_http_server"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mitoma/rust_simple_http_server'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 89ce8e5a92b38e2aee4c759e7b6eb55c48c49f11
[INFO] sha for GitHub repo mitoma/rust_simple_http_server: 89ce8e5a92b38e2aee4c759e7b6eb55c48c49f11
[INFO] validating manifest of mitoma/rust_simple_http_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 mitoma/rust_simple_http_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 mitoma/rust_simple_http_server
[INFO] finished frobbing mitoma/rust_simple_http_server
[INFO] frobbed toml for mitoma/rust_simple_http_server written to work/ex/beta-1.38-1/sources/1.37.0/gh/mitoma/rust_simple_http_server/Cargo.toml
[INFO] started frobbing mitoma/rust_simple_http_server
[INFO] finished frobbing mitoma/rust_simple_http_server
[INFO] frobbed toml for mitoma/rust_simple_http_server written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mitoma/rust_simple_http_server/Cargo.toml
[INFO] crate mitoma/rust_simple_http_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 mitoma/rust_simple_http_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-5/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/mitoma/rust_simple_http_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] baa037b5d024103196ff53902232e834d9c384fb3ecabe4c7369d6b383b64e94
[INFO] running `"docker" "start" "-a" "baa037b5d024103196ff53902232e834d9c384fb3ecabe4c7369d6b383b64e94"`
[INFO] [stderr]    Compiling rust_simple_http_server v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |         stream.map(echo);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.00s
[INFO] running `"docker" "inspect" "baa037b5d024103196ff53902232e834d9c384fb3ecabe4c7369d6b383b64e94"`
[INFO] running `"docker" "rm" "-f" "baa037b5d024103196ff53902232e834d9c384fb3ecabe4c7369d6b383b64e94"`
[INFO] [stdout] baa037b5d024103196ff53902232e834d9c384fb3ecabe4c7369d6b383b64e94
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/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/mitoma/rust_simple_http_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] c4e5b631411ba600f8f86a630affb0209c1362f1af0ed164158c581a748f54d4
[INFO] running `"docker" "start" "-a" "c4e5b631411ba600f8f86a630affb0209c1362f1af0ed164158c581a748f54d4"`
[INFO] [stderr]    Compiling rust_simple_http_server v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |         stream.map(echo);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.96s
[INFO] running `"docker" "inspect" "c4e5b631411ba600f8f86a630affb0209c1362f1af0ed164158c581a748f54d4"`
[INFO] running `"docker" "rm" "-f" "c4e5b631411ba600f8f86a630affb0209c1362f1af0ed164158c581a748f54d4"`
[INFO] [stdout] c4e5b631411ba600f8f86a630affb0209c1362f1af0ed164158c581a748f54d4
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/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/mitoma/rust_simple_http_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] fa590a22d2f2d11759bf5ff7ef920147931adb22556ff9c9dc4ec17e54e52156
[INFO] running `"docker" "start" "-a" "fa590a22d2f2d11759bf5ff7ef920147931adb22556ff9c9dc4ec17e54e52156"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_simple_http_server-cd20684ce94fcc0b
[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" "fa590a22d2f2d11759bf5ff7ef920147931adb22556ff9c9dc4ec17e54e52156"`
[INFO] running `"docker" "rm" "-f" "fa590a22d2f2d11759bf5ff7ef920147931adb22556ff9c9dc4ec17e54e52156"`
[INFO] [stdout] fa590a22d2f2d11759bf5ff7ef920147931adb22556ff9c9dc4ec17e54e52156