[INFO] crate desim 0.1.0 is already in cache
[INFO] extracting crate desim 0.1.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/desim/0.1.0
[INFO] extracting crate desim 0.1.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/desim/0.1.0
[INFO] validating manifest of desim-0.1.0 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of desim-0.1.0 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing desim-0.1.0
[INFO] finished frobbing desim-0.1.0
[INFO] frobbed toml for desim-0.1.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/desim/0.1.0/Cargo.toml
[INFO] started frobbing desim-0.1.0
[INFO] finished frobbing desim-0.1.0
[INFO] frobbed toml for desim-0.1.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/desim/0.1.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing desim-0.1.0 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/desim/0.1.0:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 6325ef0593da0436b985a6e5e54202b8ae8fde98d5b19b1cd64a736245f0710a
[INFO] running `"docker" "start" "-a" "6325ef0593da0436b985a6e5e54202b8ae8fde98d5b19b1cd64a736245f0710a"`
[INFO] [stderr]    Compiling desim v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]   --> src/lib.rs:72:1
[INFO] [stderr]    |
[INFO] [stderr] 72 | #![feature(generators, generator_trait)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `resume` found for type `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]     |                                                              ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[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" "6325ef0593da0436b985a6e5e54202b8ae8fde98d5b19b1cd64a736245f0710a"`
[INFO] running `"docker" "rm" "-f" "6325ef0593da0436b985a6e5e54202b8ae8fde98d5b19b1cd64a736245f0710a"`
[INFO] [stdout] 6325ef0593da0436b985a6e5e54202b8ae8fde98d5b19b1cd64a736245f0710a