[INFO] updating cached repository cmusser/dupcheck
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/cmusser/dupcheck
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/cmusser/dupcheck" "work/ex/beta-1.38-1/sources/1.37.0/gh/cmusser/dupcheck"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/cmusser/dupcheck'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/cmusser/dupcheck" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cmusser/dupcheck"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cmusser/dupcheck'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c2581e520445f5e042ed6b5a7ac7b86dc99363f2
[INFO] sha for GitHub repo cmusser/dupcheck: c2581e520445f5e042ed6b5a7ac7b86dc99363f2
[INFO] validating manifest of cmusser/dupcheck 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 cmusser/dupcheck 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 cmusser/dupcheck
[INFO] finished frobbing cmusser/dupcheck
[INFO] frobbed toml for cmusser/dupcheck written to work/ex/beta-1.38-1/sources/1.37.0/gh/cmusser/dupcheck/Cargo.toml
[INFO] started frobbing cmusser/dupcheck
[INFO] finished frobbing cmusser/dupcheck
[INFO] frobbed toml for cmusser/dupcheck written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cmusser/dupcheck/Cargo.toml
[INFO] crate cmusser/dupcheck 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 cmusser/dupcheck 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/cmusser/dupcheck:/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] 75c9e17c6f9a5a1730257aafd50557801bd5727068fa92210648c9479695d611
[INFO] running `"docker" "start" "-a" "75c9e17c6f9a5a1730257aafd50557801bd5727068fa92210648c9479695d611"`
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling mio v0.6.17
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling tokio-io v0.1.12
[INFO] [stderr]    Compiling tokio-threadpool v0.1.14
[INFO] [stderr]    Compiling serde_derive v1.0.91
[INFO] [stderr]    Compiling tokio-codec v0.1.1
[INFO] [stderr]    Compiling parking_lot v0.7.1
[INFO] [stderr]    Compiling csv-core v0.1.5
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling tokio-reactor v0.1.9
[INFO] [stderr]    Compiling csv v1.0.7
[INFO] [stderr]    Compiling tokio-fs v0.1.6
[INFO] [stderr]    Compiling tokio-udp v0.1.3
[INFO] [stderr]    Compiling tokio-tcp v0.1.3
[INFO] [stderr]    Compiling tokio-uds v0.2.5
[INFO] [stderr]    Compiling redis-async v0.4.4
[INFO] [stderr]    Compiling tokio v0.1.20
[INFO] [stderr] error[E0283]: type annotations required: cannot resolve `std::string::String: std::convert::AsRef<_>`
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/redis-async-0.4.4/src/client/pubsub.rs:294:41
[INFO] [stderr]     |
[INFO] [stderr] 294 |         self.con.unsubscribe(self.topic.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 `redis-async`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "75c9e17c6f9a5a1730257aafd50557801bd5727068fa92210648c9479695d611"`
[INFO] running `"docker" "rm" "-f" "75c9e17c6f9a5a1730257aafd50557801bd5727068fa92210648c9479695d611"`
[INFO] [stdout] 75c9e17c6f9a5a1730257aafd50557801bd5727068fa92210648c9479695d611