[INFO] crate gen-stream 0.2.4 is already in cache
[INFO] testing gen-stream-0.2.4 against beta-2020-06-03 for beta-1.45-1
[INFO] extracting crate gen-stream 0.2.4 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate gen-stream 0.2.4 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 gen-stream 0.2.4
[INFO] finished tweaking crates.io crate gen-stream 0.2.4
[INFO] tweaked toml for crates.io crate gen-stream 0.2.4 written to /workspace/builds/worker-14/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-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] a42ad9b6cdd235c758be94f2cceafd76d5fd0da4e9b5ea91b6e49b3b72e75a37
[INFO] running `"docker" "start" "-a" "a42ad9b6cdd235c758be94f2cceafd76d5fd0da4e9b5ea91b6e49b3b72e75a37"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling gen-stream v0.2.4 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0432]: unresolved import `std::future::set_task_context`
[INFO] [stderr]   --> src/lib.rs:79:5
[INFO] [stderr]    |
[INFO] [stderr] 79 |     std::future::set_task_context,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `set_task_context` in `future`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> src/lib.rs:67:1
[INFO] [stderr]    |
[INFO] [stderr] 67 | #![feature(generator_trait)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> src/lib.rs:68:1
[INFO] [stderr]    |
[INFO] [stderr] 68 | #![feature(gen_future)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> src/lib.rs:69:1
[INFO] [stderr]    |
[INFO] [stderr] 69 | #![feature(never_type)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0061]: this function takes 1 argument but 0 arguments were supplied
[INFO] [stderr]    --> src/lib.rs:120:52
[INFO] [stderr]     |
[INFO] [stderr] 120 |         set_task_context(cx, || match self.inner().resume() {
[INFO] [stderr]     |                                                    ^^^^^^- supplied 0 arguments
[INFO] [stderr]     |
[INFO] [stderr] help: expected the unit value `()`; create it with empty parentheses
[INFO] [stderr]     |
[INFO] [stderr] 120 |         set_task_context(cx, || match self.inner().resume(()) {
[INFO] [stderr]     |                                                           ^^
[INFO] [stderr] 
[INFO] [stderr] error[E0061]: this function takes 1 argument but 0 arguments were supplied
[INFO] [stderr]    --> src/lib.rs:151:52
[INFO] [stderr]     |
[INFO] [stderr] 151 |         set_task_context(cx, || match self.inner().resume() {
[INFO] [stderr]     |                                                    ^^^^^^- supplied 0 arguments
[INFO] [stderr]     |
[INFO] [stderr] help: expected the unit value `()`; create it with empty parentheses
[INFO] [stderr]     |
[INFO] [stderr] 151 |         set_task_context(cx, || match self.inner().resume(()) {
[INFO] [stderr]     |                                                           ^^
[INFO] [stderr] 
[INFO] [stderr] error[E0061]: this function takes 1 argument but 0 arguments were supplied
[INFO] [stderr]    --> src/lib.rs:191:61
[INFO] [stderr]     |
[INFO] [stderr] 191 |         set_task_context(cx, || match self.as_mut().inner().resume() {
[INFO] [stderr]     |                                                             ^^^^^^- supplied 0 arguments
[INFO] [stderr]     |
[INFO] [stderr] help: expected the unit value `()`; create it with empty parentheses
[INFO] [stderr]     |
[INFO] [stderr] 191 |         set_task_context(cx, || match self.as_mut().inner().resume(()) {
[INFO] [stderr]     |                                                                    ^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 7 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0061, E0432, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0061`.
[INFO] [stderr] error: could not compile `gen-stream`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "a42ad9b6cdd235c758be94f2cceafd76d5fd0da4e9b5ea91b6e49b3b72e75a37"`
[INFO] running `"docker" "rm" "-f" "a42ad9b6cdd235c758be94f2cceafd76d5fd0da4e9b5ea91b6e49b3b72e75a37"`
[INFO] [stdout] a42ad9b6cdd235c758be94f2cceafd76d5fd0da4e9b5ea91b6e49b3b72e75a37