[INFO] updating cached repository samstokes/seesaw-game
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/samstokes/seesaw-game
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/samstokes/seesaw-game" "work/ex/beta-1.38-1/sources/1.37.0/gh/samstokes/seesaw-game"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/samstokes/seesaw-game'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/samstokes/seesaw-game" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/samstokes/seesaw-game"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/samstokes/seesaw-game'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 22489b99c7ff32c50b4d48fffb93b0ee6ee4e422
[INFO] sha for GitHub repo samstokes/seesaw-game: 22489b99c7ff32c50b4d48fffb93b0ee6ee4e422
[INFO] validating manifest of samstokes/seesaw-game 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 samstokes/seesaw-game 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 samstokes/seesaw-game
[INFO] finished frobbing samstokes/seesaw-game
[INFO] frobbed toml for samstokes/seesaw-game written to work/ex/beta-1.38-1/sources/1.37.0/gh/samstokes/seesaw-game/Cargo.toml
[INFO] started frobbing samstokes/seesaw-game
[INFO] finished frobbing samstokes/seesaw-game
[INFO] frobbed toml for samstokes/seesaw-game written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/samstokes/seesaw-game/Cargo.toml
[INFO] crate samstokes/seesaw-game 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 samstokes/seesaw-game 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-5/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/samstokes/seesaw-game:/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] 01ff687f1ac438c38bb7af1b038e024dd8e8cd535902b19cbaeda50d3dde8b0c
[INFO] running `"docker" "start" "-a" "01ff687f1ac438c38bb7af1b038e024dd8e8cd535902b19cbaeda50d3dde8b0c"`
[INFO] [stderr]    Compiling downcast v0.9.2
[INFO] [stderr]    Compiling nix v0.11.0
[INFO] [stderr]    Compiling wayland-client v0.20.12
[INFO] [stderr]    Compiling wayland-protocols v0.20.12
[INFO] [stderr]    Compiling approx v0.3.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling x11-dl v2.18.3
[INFO] [stderr]    Compiling shared_library v0.1.9
[INFO] [stderr] error[E0034]: multiple applicable items in scope
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/downcast-0.9.2/src/lib.rs:120:38
[INFO] [stderr]     |
[INFO] [stderr] 120 |     fn is_type(&self) -> bool { self.type_id() == TypeId::of::<T>() }
[INFO] [stderr]     |                                      ^^^^^^^ multiple `type_id` found
[INFO] [stderr]     |
[INFO] [stderr] note: candidate #1 is defined in the trait `Any`
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/downcast-0.9.2/src/lib.rs:29:5
[INFO] [stderr]     |
[INFO] [stderr] 29  |     fn type_id(&self) -> TypeId { TypeId::of::<Self>() }
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     = help: to disambiguate the method call, write `Any::type_id(&self)` instead
[INFO] [stderr] note: candidate #2 is defined in the trait `std::any::Any`
[INFO] [stderr]     = help: to disambiguate the method call, write `std::any::Any::type_id(&self)` instead
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0034`.
[INFO] [stderr] error: Could not compile `downcast`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "01ff687f1ac438c38bb7af1b038e024dd8e8cd535902b19cbaeda50d3dde8b0c"`
[INFO] running `"docker" "rm" "-f" "01ff687f1ac438c38bb7af1b038e024dd8e8cd535902b19cbaeda50d3dde8b0c"`
[INFO] [stdout] 01ff687f1ac438c38bb7af1b038e024dd8e8cd535902b19cbaeda50d3dde8b0c