[INFO] fetching crate mimir 0.3.5...
[INFO] documenting mimir-0.3.5 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate mimir 0.3.5 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate mimir 0.3.5 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 crates.io crate mimir 0.3.5
[INFO] finished tweaking crates.io crate mimir 0.3.5
[INFO] tweaked toml for crates.io crate mimir 0.3.5 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5338c0f0d7e2a815243f0bb75bca1cbb89e5d9c68506e356c8891aedc43a0951
[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" "5338c0f0d7e2a815243f0bb75bca1cbb89e5d9c68506e356c8891aedc43a0951", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5338c0f0d7e2a815243f0bb75bca1cbb89e5d9c68506e356c8891aedc43a0951", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5338c0f0d7e2a815243f0bb75bca1cbb89e5d9c68506e356c8891aedc43a0951", kill_on_drop: false }`
[INFO] [stdout] 5338c0f0d7e2a815243f0bb75bca1cbb89e5d9c68506e356c8891aedc43a0951
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6c4afee2620385ec48fb8ccc1a4a97e3fb1bebf2f204ea45b8a85994aced54a7
[INFO] running `Command { std: "docker" "start" "-a" "6c4afee2620385ec48fb8ccc1a4a97e3fb1bebf2f204ea45b8a85994aced54a7", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling slog v2.5.2
[INFO] [stderr]    Compiling derive_builder v0.9.0
[INFO] [stderr]     Checking hex-slice v0.1.4
[INFO] [stderr]    Compiling mimir v0.3.5 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]     Checking chrono v0.4.15
[INFO] [stdout] warning: use of deprecated item 'gcc::Build': crate has been renamed to `cc`, the `gcc` name is not maintained
[INFO] [stdout]   --> build.rs:14:21
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let mut build = gcc::Build::new();
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'gcc::Build::new': crate has been renamed to `cc`, the `gcc` name is not maintained
[INFO] [stdout]   --> build.rs:14:21
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let mut build = gcc::Build::new();
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking slog-try v0.2.0
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling getset v0.1.1
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]    Compiling darling v0.10.2
[INFO] [stderr]    Compiling derive_builder_core v0.9.0
[INFO] [stderr]  Documenting mimir v0.3.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | #![feature(ptr_internals, try_from, untagged_unions)]
[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 `mimir`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name mimir src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="slog"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern bitflags=/opt/rustwide/target/debug/deps/libbitflags-fd77edb4698da2bb.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-689c1a3792cc2c51.rmeta --extern derive_builder=/opt/rustwide/target/debug/deps/libderive_builder-ab7523a2889b9a09.so --extern error_chain=/opt/rustwide/target/debug/deps/liberror_chain-ca69d028f014db35.rmeta --extern getset=/opt/rustwide/target/debug/deps/libgetset-927534b8bba90787.so --extern hex_slice=/opt/rustwide/target/debug/deps/libhex_slice-38b36c248ba5f96a.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-33051cf5e9044f58.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-9de4bdcd0d606d7b.rmeta --extern slog=/opt/rustwide/target/debug/deps/libslog-f96788f35f7718ca.rmeta --extern slog_try=/opt/rustwide/target/debug/deps/libslog_try-3e9f4395afc1f977.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "6c4afee2620385ec48fb8ccc1a4a97e3fb1bebf2f204ea45b8a85994aced54a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c4afee2620385ec48fb8ccc1a4a97e3fb1bebf2f204ea45b8a85994aced54a7", kill_on_drop: false }`
[INFO] [stdout] 6c4afee2620385ec48fb8ccc1a4a97e3fb1bebf2f204ea45b8a85994aced54a7