[INFO] updating cached repository AlexanderElias/rust-nickel-mustache
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/AlexanderElias/rust-nickel-mustache
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/AlexanderElias/rust-nickel-mustache" "work/ex/beta-1.38-1/sources/1.37.0/gh/AlexanderElias/rust-nickel-mustache"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/AlexanderElias/rust-nickel-mustache'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/AlexanderElias/rust-nickel-mustache" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/AlexanderElias/rust-nickel-mustache"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/AlexanderElias/rust-nickel-mustache'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2735d081a4134d775e4e87e57b481adcf11dcac3
[INFO] sha for GitHub repo AlexanderElias/rust-nickel-mustache: 2735d081a4134d775e4e87e57b481adcf11dcac3
[INFO] validating manifest of AlexanderElias/rust-nickel-mustache 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 AlexanderElias/rust-nickel-mustache 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 AlexanderElias/rust-nickel-mustache
[INFO] finished frobbing AlexanderElias/rust-nickel-mustache
[INFO] frobbed toml for AlexanderElias/rust-nickel-mustache written to work/ex/beta-1.38-1/sources/1.37.0/gh/AlexanderElias/rust-nickel-mustache/Cargo.toml
[INFO] started frobbing AlexanderElias/rust-nickel-mustache
[INFO] finished frobbing AlexanderElias/rust-nickel-mustache
[INFO] frobbed toml for AlexanderElias/rust-nickel-mustache written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/AlexanderElias/rust-nickel-mustache/Cargo.toml
[INFO] crate AlexanderElias/rust-nickel-mustache 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/AlexanderElias/rust-nickel-mustache/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] 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 AlexanderElias/rust-nickel-mustache 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-2/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/AlexanderElias/rust-nickel-mustache:/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] 584747d45f5fce263bec1844f9d64c6a3cd3d9dce606836ed66011db1074b74f
[INFO] running `"docker" "start" "-a" "584747d45f5fce263bec1844f9d64c6a3cd3d9dce606836ed66011db1074b74f"`
[INFO] [stderr]    Compiling mustache v0.9.0
[INFO] [stderr]    Compiling nickel v0.11.0
[INFO] [stderr]    Compiling nickel-template v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0277]: `std::option::Option<&str>` doesn't implement `std::fmt::Display`
[INFO] [stderr]   --> src/main.rs:22:34
[INFO] [stderr]    |
[INFO] [stderr] 22 |             format!("Hello : {}",req.param("name"))
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^^^^^ `std::option::Option<&str>` cannot be formatted with the default formatter
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::fmt::Display` is not implemented for `std::option::Option<&str>`
[INFO] [stderr]    = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
[INFO] [stderr]    = note: required by `std::fmt::Display::fmt`
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/main.rs:28:21
[INFO] [stderr]    |
[INFO] [stderr] 28 |       server.get("/", middleware! { |req, res|
[INFO] [stderr]    |  _____________________^
[INFO] [stderr] 29 | |
[INFO] [stderr] 30 | |         let mut data = HashMap::<&str, &str>::new();
[INFO] [stderr] 31 | |         data.insert("title","Index");
[INFO] [stderr] 32 | |
[INFO] [stderr] 33 | |         return res.render("views/index.html", &data);
[INFO] [stderr] 34 | |     });
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0277`.
[INFO] [stderr] error: Could not compile `nickel-template`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "584747d45f5fce263bec1844f9d64c6a3cd3d9dce606836ed66011db1074b74f"`
[INFO] running `"docker" "rm" "-f" "584747d45f5fce263bec1844f9d64c6a3cd3d9dce606836ed66011db1074b74f"`
[INFO] [stdout] 584747d45f5fce263bec1844f9d64c6a3cd3d9dce606836ed66011db1074b74f