[INFO] updating cached repository https://github.com/raviqqe/tokio-examples
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/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] e10e37b58635fd5a37c272363c1eef6f89f9695b
[INFO] testing raviqqe/tokio-examples against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fraviqqe%2Ftokio-examples" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/raviqqe/tokio-examples on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/raviqqe/tokio-examples
[INFO] finished tweaking git repo https://github.com/raviqqe/tokio-examples
[INFO] tweaked toml for git repo https://github.com/raviqqe/tokio-examples written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/raviqqe/tokio-examples already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+1.44.0" "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] 3520cc32062a5171eee4c995778814ad6d59cf533c29ad819924a4c9bedd58d2
[INFO] running `"docker" "start" "-a" "3520cc32062a5171eee4c995778814ad6d59cf533c29ad819924a4c9bedd58d2"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling futures v0.1.26
[INFO] [stderr]    Compiling context v1.0.1
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling coroutine v0.8.0
[INFO] [stderr] error[E0432]: unresolved import `std::boxed::FnBox`
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/coroutine-0.8.0/src/asymmetric.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 | use std::boxed::FnBox;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^ no `FnBox` in `boxed`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/coroutine-0.8.0/src/lib.rs:25:1
[INFO] [stderr]    |
[INFO] [stderr] 25 | #![feature(fnbox)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: could not compile `coroutine`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "3520cc32062a5171eee4c995778814ad6d59cf533c29ad819924a4c9bedd58d2"`
[INFO] running `"docker" "rm" "-f" "3520cc32062a5171eee4c995778814ad6d59cf533c29ad819924a4c9bedd58d2"`
[INFO] [stdout] 3520cc32062a5171eee4c995778814ad6d59cf533c29ad819924a4c9bedd58d2