[INFO] crate desim 0.1.0 is already in cache
[INFO] testing desim-0.1.0 against beta-2020-06-03 for beta-1.45-1
[INFO] extracting crate desim 0.1.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate desim 0.1.0 on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate desim 0.1.0
[INFO] finished tweaking crates.io crate desim 0.1.0
[INFO] tweaked toml for crates.io crate desim 0.1.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] bd457d0b3e41891fa377ab504244bd737077f55e554f193a0e9469cd82893e24
[INFO] running `"docker" "start" "-a" "bd457d0b3e41891fa377ab504244bd737077f55e554f193a0e9469cd82893e24"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling desim v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> src/lib.rs:72:1
[INFO] [stderr]    |
[INFO] [stderr] 72 | #![feature(generators, generator_trait)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:116:24
[INFO] [stderr]     |
[INFO] [stderr] 116 |     processes: Vec<Box<Generator<Yield = Effect, Return = ()>>>,
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Generator<Yield = Effect, Return = ()>`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:165:22
[INFO] [stderr]     |
[INFO] [stderr] 165 |         process: Box<Generator<Yield = Effect, Return = ()>>,
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Generator<Yield = Effect, Return = ()>`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `resume` found for struct `std::boxed::Box<(dyn std::ops::Generator<Yield = Effect, Return = ()> + 'static)>` in the current scope
[INFO] [stderr]    --> src/lib.rs:205:62
[INFO] [stderr]     |
[INFO] [stderr] 205 |                 match unsafe { self.processes[event.process].resume() } {
[INFO] [stderr]     |                                                              ^^^^^^ method not found in `std::boxed::Box<(dyn std::ops::Generator<Yield = Effect, Return = ()> + 'static)>`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors; 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0554, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `desim`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "bd457d0b3e41891fa377ab504244bd737077f55e554f193a0e9469cd82893e24"`
[INFO] running `"docker" "rm" "-f" "bd457d0b3e41891fa377ab504244bd737077f55e554f193a0e9469cd82893e24"`
[INFO] [stdout] bd457d0b3e41891fa377ab504244bd737077f55e554f193a0e9469cd82893e24