[INFO] updating cached repository simson/mqtt_test
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/simson/mqtt_test
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/simson/mqtt_test" "work/ex/beta-1.38-1/sources/1.37.0/gh/simson/mqtt_test"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/simson/mqtt_test'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/simson/mqtt_test" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/simson/mqtt_test"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/simson/mqtt_test'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3361a16b5792562a196c877f2c30a123c4bd77ea
[INFO] sha for GitHub repo simson/mqtt_test: 3361a16b5792562a196c877f2c30a123c4bd77ea
[INFO] validating manifest of simson/mqtt_test 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 simson/mqtt_test 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 simson/mqtt_test
[INFO] finished frobbing simson/mqtt_test
[INFO] frobbed toml for simson/mqtt_test written to work/ex/beta-1.38-1/sources/1.37.0/gh/simson/mqtt_test/Cargo.toml
[INFO] started frobbing simson/mqtt_test
[INFO] finished frobbing simson/mqtt_test
[INFO] frobbed toml for simson/mqtt_test written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/simson/mqtt_test/Cargo.toml
[INFO] crate simson/mqtt_test 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 simson/mqtt_test 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-4/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/simson/mqtt_test:/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] 7958f08a4f1e07abb72be5611d41488e83f8bb008e964393906f8f07d54eb69c
[INFO] running `"docker" "start" "-a" "7958f08a4f1e07abb72be5611d41488e83f8bb008e964393906f8f07d54eb69c"`
[INFO] [stderr]    Compiling enum_variants v1.0.0
[INFO] [stderr]    Compiling bitfield v0.12.1
[INFO] [stderr]    Compiling net2 v0.2.32
[INFO] [stderr]    Compiling inotify v0.3.0
[INFO] [stderr]    Compiling filetime v0.1.15
[INFO] [stderr]    Compiling openssl-sys v0.9.36
[INFO] [stderr]    Compiling nix v0.5.1
[INFO] [stderr]    Compiling nix v0.9.0
[INFO] [stderr]    Compiling threadpool v1.7.1
[INFO] [stderr]    Compiling syn v0.13.1
[INFO] [stderr]    Compiling regex v0.2.10
[INFO] [stderr]    Compiling serde_json v1.0.19
[INFO] [stderr]    Compiling syn v0.12.15
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]    Compiling derivation v0.1.0
[INFO] [stderr]    Compiling miow v0.1.5
[INFO] [stderr]    Compiling backtrace v0.3.5
[INFO] [stderr]    Compiling rayon v0.9.0
[INFO] [stderr]    Compiling openssl v0.9.24
[INFO] [stderr]    Compiling error-chain v0.11.0
[INFO] [stderr]    Compiling failure v0.1.1
[INFO] [stderr]    Compiling mio v0.5.1
[INFO] [stderr]    Compiling handlebars v0.29.1
[INFO] [stderr]    Compiling env_logger v0.5.6
[INFO] [stderr]    Compiling mqtt-protocol v0.3.1
[INFO] [stderr]    Compiling serde_derive_internals v0.23.0
[INFO] [stderr]    Compiling notify v4.0.3
[INFO] [stderr]    Compiling structopt-derive v0.2.6
[INFO] [stderr]    Compiling rumqtt v0.10.1 (https://github.com/AtherEnergy/rumqtt.git#08c2e892)
[INFO] [stderr]    Compiling structopt v0.2.6
[INFO] [stderr]    Compiling serde_derive v1.0.37
[INFO] [stderr]    Compiling derive-error-chain v0.11.1
[INFO] [stderr]    Compiling dotenv v0.11.0
[INFO] [stderr]    Compiling interfaces v0.0.4
[INFO] [stderr]    Compiling quicli v0.2.0
[INFO] [stderr]    Compiling mqtt_test v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0283]: type annotations required: cannot resolve `std::string::String: std::convert::AsRef<_>`
[INFO] [stderr]   --> src/main.rs:17:34
[INFO] [stderr]    |
[INFO] [stderr] 17 |         .set_client_id(client_id.as_ref())
[INFO] [stderr]    |                                  ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0283`.
[INFO] [stderr] error: Could not compile `mqtt_test`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "7958f08a4f1e07abb72be5611d41488e83f8bb008e964393906f8f07d54eb69c"`
[INFO] running `"docker" "rm" "-f" "7958f08a4f1e07abb72be5611d41488e83f8bb008e964393906f8f07d54eb69c"`
[INFO] [stdout] 7958f08a4f1e07abb72be5611d41488e83f8bb008e964393906f8f07d54eb69c