[INFO] updating cached repository jnst/hello_world
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jnst/hello_world
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jnst/hello_world" "work/ex/beta-1.37-6/sources/1.36.0/gh/jnst/hello_world"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/jnst/hello_world'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jnst/hello_world" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jnst/hello_world"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jnst/hello_world'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5ab370339ee9d5351e42864835d885ed33f0c975
[INFO] sha for GitHub repo jnst/hello_world: 5ab370339ee9d5351e42864835d885ed33f0c975
[INFO] validating manifest of jnst/hello_world 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 jnst/hello_world 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 jnst/hello_world
[INFO] finished frobbing jnst/hello_world
[INFO] frobbed toml for jnst/hello_world written to work/ex/beta-1.37-6/sources/1.36.0/gh/jnst/hello_world/Cargo.toml
[INFO] started frobbing jnst/hello_world
[INFO] finished frobbing jnst/hello_world
[INFO] frobbed toml for jnst/hello_world written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jnst/hello_world/Cargo.toml
[INFO] crate jnst/hello_world already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/jnst/hello_world/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[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 jnst/hello_world 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-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/jnst/hello_world:/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] aa820d06b26bb6922ad7980f72b5e472e5810f62badb26122e70a9c9c74bb759
[INFO] running `"docker" "start" "-a" "aa820d06b26bb6922ad7980f72b5e472e5810f62badb26122e70a9c9c74bb759"`
[INFO] [stderr]    Compiling groupable v0.2.0
[INFO] [stderr]    Compiling num_cpus v1.10.1
[INFO] [stderr]    Compiling base64 v0.9.3
[INFO] [stderr]    Compiling mustache v0.9.0
[INFO] [stderr]    Compiling hyper v0.10.16
[INFO] [stderr]    Compiling nickel v0.11.0
[INFO] [stderr]    Compiling hello_world v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     server.listen("127.0.0.1:6767");
[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 18.56s
[INFO] running `"docker" "inspect" "aa820d06b26bb6922ad7980f72b5e472e5810f62badb26122e70a9c9c74bb759"`
[INFO] running `"docker" "rm" "-f" "aa820d06b26bb6922ad7980f72b5e472e5810f62badb26122e70a9c9c74bb759"`
[INFO] [stdout] aa820d06b26bb6922ad7980f72b5e472e5810f62badb26122e70a9c9c74bb759
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/jnst/hello_world:/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] 96f195c3fea50f75655d4376f196c7d9e97f22c3288c916dec5cca8ec9c1af2c
[INFO] running `"docker" "start" "-a" "96f195c3fea50f75655d4376f196c7d9e97f22c3288c916dec5cca8ec9c1af2c"`
[INFO] [stderr]    Compiling hello_world v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     server.listen("127.0.0.1:6767");
[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 0.70s
[INFO] running `"docker" "inspect" "96f195c3fea50f75655d4376f196c7d9e97f22c3288c916dec5cca8ec9c1af2c"`
[INFO] running `"docker" "rm" "-f" "96f195c3fea50f75655d4376f196c7d9e97f22c3288c916dec5cca8ec9c1af2c"`
[INFO] [stdout] 96f195c3fea50f75655d4376f196c7d9e97f22c3288c916dec5cca8ec9c1af2c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/jnst/hello_world:/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] e02230b588b82b6f9e7adc5fef22486117f4d8a7ef9a9a624c971f2fe563fb23
[INFO] running `"docker" "start" "-a" "e02230b588b82b6f9e7adc5fef22486117f4d8a7ef9a9a624c971f2fe563fb23"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/hello_world-e2e7b35eee9b57f2
[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" "e02230b588b82b6f9e7adc5fef22486117f4d8a7ef9a9a624c971f2fe563fb23"`
[INFO] running `"docker" "rm" "-f" "e02230b588b82b6f9e7adc5fef22486117f4d8a7ef9a9a624c971f2fe563fb23"`
[INFO] [stdout] e02230b588b82b6f9e7adc5fef22486117f4d8a7ef9a9a624c971f2fe563fb23