[INFO] cloning repository https://github.com/inv2004/rust-async-kv-benchmarks
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/inv2004/rust-async-kv-benchmarks" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Finv2004%2Frust-async-kv-benchmarks", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Finv2004%2Frust-async-kv-benchmarks'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e747014fbd00e48b882065bc620db5a109b1564d
[INFO] documenting inv2004/rust-async-kv-benchmarks against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Finv2004%2Frust-async-kv-benchmarks" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/inv2004/rust-async-kv-benchmarks on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/inv2004/rust-async-kv-benchmarks
[INFO] finished tweaking git repo https://github.com/inv2004/rust-async-kv-benchmarks
[INFO] tweaked toml for git repo https://github.com/inv2004/rust-async-kv-benchmarks written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/inv2004/rust-async-kv-benchmarks already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1ad9474619831dba36a9644f07ce808a07f3011c9033c840e577603cb3d21296
[INFO] running `Command { std: "docker" "start" "-a" "1ad9474619831dba36a9644f07ce808a07f3011c9033c840e577603cb3d21296", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1ad9474619831dba36a9644f07ce808a07f3011c9033c840e577603cb3d21296", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ad9474619831dba36a9644f07ce808a07f3011c9033c840e577603cb3d21296", kill_on_drop: false }`
[INFO] [stdout] 1ad9474619831dba36a9644f07ce808a07f3011c9033c840e577603cb3d21296
[INFO] running `Command { std: "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" "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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7b84148442b8a8a76023e42d8d7eaa6f6940a5aced58e6699b879d68a3ad7714
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[INFO] [stderr]  Documenting tokio-db v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/bin/kv_rwlock_multi.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(async_await)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/bin/kv_cmap_multi.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(async_await)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/bin/kv_refcell_single.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(async_await)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/bin/kv_cmap_single.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(async_await)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/bin/kv_thr_msg.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(async_await)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `tokio-db`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name kv_cmap_multi src/bin/kv_cmap_multi.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern actix=/opt/rustwide/target/debug/deps/libactix-74ab999c6f6d866e.rmeta --extern actix_rt=/opt/rustwide/target/debug/deps/libactix_rt-c992397d9fc8d076.rmeta --extern actix_web=/opt/rustwide/target/debug/deps/libactix_web-d0affeffbd45a3ec.rmeta --extern chashmap=/opt/rustwide/target/debug/deps/libchashmap-1f941cca2e7f7eb9.rmeta --extern crossbeam_requests=/opt/rustwide/target/debug/deps/libcrossbeam_requests-06d1e8ee33501b45.rmeta --extern futures01=/opt/rustwide/target/debug/deps/libfutures-4518376d38d47668.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-9a97d3cae9689c32.rmeta --extern hyper=/opt/rustwide/target/debug/deps/libhyper-c8445fbc3743260e.rmeta --extern num_cpus=/opt/rustwide/target/debug/deps/libnum_cpus-3079117e8ac189ba.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-daa17fba4fd6c2e3.rmeta --cap-lints=warn` (exit code: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "7b84148442b8a8a76023e42d8d7eaa6f6940a5aced58e6699b879d68a3ad7714", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b84148442b8a8a76023e42d8d7eaa6f6940a5aced58e6699b879d68a3ad7714", kill_on_drop: false }`
[INFO] [stdout] 7b84148442b8a8a76023e42d8d7eaa6f6940a5aced58e6699b879d68a3ad7714