[INFO] fetching crate http-rs 0.1.3...
[INFO] documenting http-rs-0.1.3 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate http-rs 0.1.3 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate http-rs 0.1.3 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 crates.io crate http-rs 0.1.3
[INFO] finished tweaking crates.io crate http-rs 0.1.3
[INFO] tweaked toml for crates.io crate http-rs 0.1.3 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tracing-subscriber v0.2.11
[INFO] [stderr]   Downloaded tracing-serde v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 292bafd2d1614f0e4d9d3125f82161a955a2c149219117c04f80d624526c1c5f
[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" "292bafd2d1614f0e4d9d3125f82161a955a2c149219117c04f80d624526c1c5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "292bafd2d1614f0e4d9d3125f82161a955a2c149219117c04f80d624526c1c5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "292bafd2d1614f0e4d9d3125f82161a955a2c149219117c04f80d624526c1c5f", kill_on_drop: false }`
[INFO] [stdout] 292bafd2d1614f0e4d9d3125f82161a955a2c149219117c04f80d624526c1c5f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 4385ec1c0aeec92db41567550cd3add4f8fbb907b12dd11e936a7e445cfb4fbb
[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" "4385ec1c0aeec92db41567550cd3add4f8fbb907b12dd11e936a7e445cfb4fbb", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]     Checking arc-swap v0.4.7
[INFO] [stderr]     Checking smallvec v1.4.2
[INFO] [stderr]     Checking tracing-core v0.1.15
[INFO] [stderr]     Checking sharded-slab v0.0.9
[INFO] [stderr]     Checking futures-channel v0.3.5
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking memchr v2.3.3
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking signal-hook-registry v1.2.1
[INFO] [stderr]     Checking tracing-serde v0.1.1
[INFO] [stderr]     Checking tracing-log v0.1.1
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]     Checking tracing-subscriber v0.2.11
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling tracing-attributes v0.1.11
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]     Checking tracing v0.1.19
[INFO] [stderr]     Checking pin-project v0.4.23
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking tracing-futures v0.2.4
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]  Documenting http-rs v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[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 `http-rs`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name http_rs src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern bytes=/opt/rustwide/target/debug/deps/libbytes-c5714e68d7e46dbf.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-dedee9635f859632.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-953cd09f868a74dc.rmeta --extern tokio_util=/opt/rustwide/target/debug/deps/libtokio_util-58f281525ed5d339.rmeta --extern tracing=/opt/rustwide/target/debug/deps/libtracing-13fabe23a5f57685.rmeta --extern tracing_futures=/opt/rustwide/target/debug/deps/libtracing_futures-36b840838e390116.rmeta --extern tracing_subscriber=/opt/rustwide/target/debug/deps/libtracing_subscriber-a434838e063a890a.rmeta --extern url=/opt/rustwide/target/debug/deps/liburl-ead0c533f54ff04b.rmeta --cap-lints=warn --crate-version 0.1.3` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "4385ec1c0aeec92db41567550cd3add4f8fbb907b12dd11e936a7e445cfb4fbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4385ec1c0aeec92db41567550cd3add4f8fbb907b12dd11e936a7e445cfb4fbb", kill_on_drop: false }`
[INFO] [stdout] 4385ec1c0aeec92db41567550cd3add4f8fbb907b12dd11e936a7e445cfb4fbb