[INFO] updating cached repository O-I/nickel-demo
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/O-I/nickel-demo
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/O-I/nickel-demo" "work/ex/beta-1.38-1/sources/1.37.0/gh/O-I/nickel-demo"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/O-I/nickel-demo'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/O-I/nickel-demo" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/O-I/nickel-demo"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/O-I/nickel-demo'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6a4e3f63f30bd6b76deb7a2ae40f91f891f353b5
[INFO] sha for GitHub repo O-I/nickel-demo: 6a4e3f63f30bd6b76deb7a2ae40f91f891f353b5
[INFO] validating manifest of O-I/nickel-demo 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 O-I/nickel-demo 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 O-I/nickel-demo
[INFO] finished frobbing O-I/nickel-demo
[INFO] frobbed toml for O-I/nickel-demo written to work/ex/beta-1.38-1/sources/1.37.0/gh/O-I/nickel-demo/Cargo.toml
[INFO] started frobbing O-I/nickel-demo
[INFO] finished frobbing O-I/nickel-demo
[INFO] frobbed toml for O-I/nickel-demo written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/O-I/nickel-demo/Cargo.toml
[INFO] crate O-I/nickel-demo 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] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/O-I/nickel-demo/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[INFO] the lockfile is outdated, regenerating it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" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Updating git repository `https://github.com/nickel-org/nickel.rs.git`
[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] [stderr]     Updating git repository `https://github.com/nickel-org/nickel.rs.git`
[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 O-I/nickel-demo 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-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/O-I/nickel-demo:/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] a065baa542b78214257f363df73881e05e80d58921d82254405e6d9909497224
[INFO] running `"docker" "start" "-a" "a065baa542b78214257f363df73881e05e80d58921d82254405e6d9909497224"`
[INFO] [stderr]    Compiling hyper v0.10.16
[INFO] [stderr]    Compiling nickel v0.11.0 (https://github.com/nickel-org/nickel.rs.git#2d0e3d03)
[INFO] [stderr]    Compiling nickel-demo v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0433]: failed to resolve: could not find `net` in `io`
[INFO] [stderr]  --> src/main.rs:3:14
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::io::net::ip::Ipv4Addr;
[INFO] [stderr]   |              ^^^ could not find `net` in `io`
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `Ipv4Addr` in this scope
[INFO] [stderr]   --> src/main.rs:14:17
[INFO] [stderr]    |
[INFO] [stderr] 14 |   server.listen(Ipv4Addr(127, 0, 0, 1), 6767);
[INFO] [stderr]    |                 ^^^^^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::net::ip::Ipv4Addr`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::io::net::ip::Ipv4Addr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `get` found for type `nickel::Nickel` in the current scope
[INFO] [stderr]   --> src/main.rs:13:10
[INFO] [stderr]    |
[INFO] [stderr] 13 |   server.get("/hello", a_handler);
[INFO] [stderr]    |          ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: items from traits can only be used if the trait is in scope
[INFO] [stderr] help: the following trait is implemented but not in scope, perhaps add a `use` for it:
[INFO] [stderr]    |
[INFO] [stderr] 3  | use nickel::HttpRouter;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0061]: this function takes 1 parameter but 2 parameters were supplied
[INFO] [stderr]   --> src/main.rs:14:10
[INFO] [stderr]    |
[INFO] [stderr] 14 |   server.listen(Ipv4Addr(127, 0, 0, 1), 6767);
[INFO] [stderr]    |          ^^^^^^ expected 1 parameter
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0061, E0425, E0433, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0061`.
[INFO] [stderr] error: Could not compile `nickel-demo`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "a065baa542b78214257f363df73881e05e80d58921d82254405e6d9909497224"`
[INFO] running `"docker" "rm" "-f" "a065baa542b78214257f363df73881e05e80d58921d82254405e6d9909497224"`
[INFO] [stdout] a065baa542b78214257f363df73881e05e80d58921d82254405e6d9909497224