[INFO] cloning repository https://github.com/jimblandy/mock-executor
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jimblandy/mock-executor" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjimblandy%2Fmock-executor", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjimblandy%2Fmock-executor'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0d9f55d79e9783c047bec32e49e2a068ac94b58c
[INFO] documenting jimblandy/mock-executor against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjimblandy%2Fmock-executor" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jimblandy/mock-executor on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jimblandy/mock-executor
[INFO] finished tweaking git repo https://github.com/jimblandy/mock-executor
[INFO] tweaked toml for git repo https://github.com/jimblandy/mock-executor written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/jimblandy/mock-executor already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7c92f6e1e314b6fb732393b913c13cef25693dc5eb54cf062887fb0d58bb1354
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7c92f6e1e314b6fb732393b913c13cef25693dc5eb54cf062887fb0d58bb1354", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7c92f6e1e314b6fb732393b913c13cef25693dc5eb54cf062887fb0d58bb1354", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c92f6e1e314b6fb732393b913c13cef25693dc5eb54cf062887fb0d58bb1354", kill_on_drop: false }`
[INFO] [stdout] 7c92f6e1e314b6fb732393b913c13cef25693dc5eb54cf062887fb0d58bb1354
[INFO] running `Command { std: "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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 991e73ee45e68b142e65c59b0cd129a9f9cfd72750a6f7b23934cc173ff3c145
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "991e73ee45e68b142e65c59b0cd129a9f9cfd72750a6f7b23934cc173ff3c145", kill_on_drop: false }`
[INFO] [stderr]  Documenting async2 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0670]: `async fn` is not permitted in the 2015 edition
[INFO] [stdout]    --> src/main.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | async fn print<F>(label: &'static str, future: F)
[INFO] [stdout]     | ^^^^^ to use `async fn`, switch to Rust 2018
[INFO] [stdout]     |
[INFO] [stdout]     = help: set `edition = "2018"` in `Cargo.toml`
[INFO] [stdout]     = note: for more on editions, read https://doc.rust-lang.org/edition-guide
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/main.rs:1:47
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(arbitrary_self_types, async_await, await_macro, fnbox, futures_api, pin)]
[INFO] [stdout]   |                                               ^^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: subsumed by `.await` syntax
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved imports `std::task::LocalWaker`, `std::task::local_waker_from_nonlocal`
[INFO] [stdout]  --> src/main.rs:8:23
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::task::{self, LocalWaker, local_waker_from_nonlocal, Poll};
[INFO] [stdout]   |                       ^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^^^^^^ no `local_waker_from_nonlocal` in `task`
[INFO] [stdout]   |                       |
[INFO] [stdout]   |                       no `LocalWaker` in `task`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `await` in this scope
[INFO] [stdout]    --> src/main.rs:230:33
[INFO] [stdout]     |
[INFO] [stdout] 230 |     println!("{}: {:?}", label, await!(future));
[INFO] [stdout]     |                                 ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(arbitrary_self_types, async_await, await_macro, fnbox, futures_api, pin)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0554, E0557, E0670.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `async2`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name async2 src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "991e73ee45e68b142e65c59b0cd129a9f9cfd72750a6f7b23934cc173ff3c145", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "991e73ee45e68b142e65c59b0cd129a9f9cfd72750a6f7b23934cc173ff3c145", kill_on_drop: false }`
[INFO] [stdout] 991e73ee45e68b142e65c59b0cd129a9f9cfd72750a6f7b23934cc173ff3c145