[INFO] updating cached repository https://github.com/FTP-rs/ftp-server-iold-rs
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 37558eaf69d09d65141d3cf8649eba78ccc95b51
[INFO] testing FTP-rs/ftp-server-iold-rs against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2FFTP-rs%2Fftp-server-iold-rs" "work/builds/worker-11/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/FTP-rs/ftp-server-iold-rs on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/FTP-rs/ftp-server-iold-rs
[INFO] finished tweaking git repo https://github.com/FTP-rs/ftp-server-iold-rs
[INFO] tweaked toml for git repo https://github.com/FTP-rs/ftp-server-iold-rs written to work/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/FTP-rs/ftp-server-iold-rs already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-11/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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-2019-09-28" "build" "--frozen"`
[INFO] [stdout] cb2688b6367b38b497cc0c1260d945139282899ffae2d594f9f7291cea726eac
[INFO] running `"docker" "start" "-a" "cb2688b6367b38b497cc0c1260d945139282899ffae2d594f9f7291cea726eac"`
[INFO] [stderr]    Compiling iold v0.1.0 (https://github.com/antoyo/iold#47f28d46)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/iold-7ce8c4fe751820af/47f28d4/src/lib.rs:28:1
[INFO] [stderr]    |
[INFO] [stderr] 28 | #![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<Return = (), Yield = YieldValue> + 'static)>` in the current scope
[INFO] [stderr]    --> /opt/rustwide/cargo-home/git/checkouts/iold-7ce8c4fe751820af/47f28d4/src/lib.rs:307:38
[INFO] [stderr]     |
[INFO] [stderr] 307 |             match unsafe { generator.resume() } {
[INFO] [stderr]     |                                      ^^^^^^ method not found in `std::boxed::Box<(dyn std::ops::Generator<Return = (), Yield = YieldValue> + 'static)>`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `resume` found for type `G` in the current scope
[INFO] [stderr]    --> /opt/rustwide/cargo-home/git/checkouts/iold-7ce8c4fe751820af/47f28d4/src/lib.rs:325:38
[INFO] [stderr]     |
[INFO] [stderr] 325 |             match unsafe { generator.resume() } {
[INFO] [stderr]     |                                      ^^^^^^ method not found in `G`
[INFO] [stderr]     |
[INFO] [stderr]     = help: items from traits can only be used if the type parameter is bounded by the trait
[INFO] [stderr] help: the following trait defines an item `resume`, perhaps you need to restrict type parameter `G` with it:
[INFO] [stderr]     |
[INFO] [stderr] 323 |     pub fn run<G: std::ops::Generator + Generator<Yield=YieldValue>>(&mut self, mut generator: G) -> io::Result<G::Return> {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `resume` found for type `std::boxed::Box<dyn std::ops::Generator<Return = (), Yield = YieldValue>>` in the current scope
[INFO] [stderr]    --> /opt/rustwide/cargo-home/git/checkouts/iold-7ce8c4fe751820af/47f28d4/src/lib.rs:335:49
[INFO] [stderr]     |
[INFO] [stderr] 335 | ...                   match unsafe { task.resume() ...
[INFO] [stderr]     |                                           ^^^^^^ method not found in `std::boxed::Box<dyn std::ops::Generator<Return = (), Yield = YieldValue>>`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 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 `iold`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "cb2688b6367b38b497cc0c1260d945139282899ffae2d594f9f7291cea726eac"`
[INFO] running `"docker" "rm" "-f" "cb2688b6367b38b497cc0c1260d945139282899ffae2d594f9f7291cea726eac"`
[INFO] [stdout] cb2688b6367b38b497cc0c1260d945139282899ffae2d594f9f7291cea726eac