[INFO] cloning repository https://github.com/twinair/mura
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/twinair/mura" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftwinair%2Fmura", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftwinair%2Fmura'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a4801fb191f563aa23c4b07c96abd7c316dd32a0
[INFO] documenting twinair/mura 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%2Ftwinair%2Fmura" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/twinair/mura 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/twinair/mura
[INFO] finished tweaking git repo https://github.com/twinair/mura
[INFO] tweaked toml for git repo https://github.com/twinair/mura written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/twinair/mura 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 }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 581c018fd7104ed3c543c225894c8d08dc37b54705f805250c6a37ecdb38e5bf
[INFO] running `Command { std: "docker" "start" "-a" "581c018fd7104ed3c543c225894c8d08dc37b54705f805250c6a37ecdb38e5bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "581c018fd7104ed3c543c225894c8d08dc37b54705f805250c6a37ecdb38e5bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "581c018fd7104ed3c543c225894c8d08dc37b54705f805250c6a37ecdb38e5bf", kill_on_drop: false }`
[INFO] [stdout] 581c018fd7104ed3c543c225894c8d08dc37b54705f805250c6a37ecdb38e5bf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 69bebbb83f24be99ba4fb1389494f363590f8a5da7f7fa481558978ba8f790c5
[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" "69bebbb83f24be99ba4fb1389494f363590f8a5da7f7fa481558978ba8f790c5", 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 libc v0.2.68
[INFO] [stderr]    Compiling serde v1.0.111
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling syn v1.0.31
[INFO] [stderr]    Compiling packed_simd v0.3.3
[INFO] [stderr]    Compiling serde_json v1.0.55
[INFO] [stderr]     Checking hex v0.4.2
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-iter v0.1.40
[INFO] [stderr]    Compiling indexmap v1.4.0
[INFO] [stderr]     Checking flatbuffers v0.6.1
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking sqlparser v0.5.0
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking num-integer v0.1.42
[INFO] [stderr]     Checking num-complex v0.2.4
[INFO] [stderr]     Checking num-bigint v0.2.6
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/packed_simd-0.3.3/src/lib.rs:202:1
[INFO] [stdout]     |
[INFO] [stdout] 202 | / #![feature(
[INFO] [stdout] 203 | |     repr_simd,
[INFO] [stdout] 204 | |     const_fn,
[INFO] [stdout] 205 | |     platform_intrinsics,
[INFO] [stdout] ...   |
[INFO] [stdout] 215 | |     custom_inner_attributes
[INFO] [stdout] 216 | | )]
[INFO] [stdout]     | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking nix v0.17.0
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking num-rational v0.2.4
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]    Compiling serde_derive v1.0.111
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking rustyline v6.1.0
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `packed_simd`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "69bebbb83f24be99ba4fb1389494f363590f8a5da7f7fa481558978ba8f790c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "69bebbb83f24be99ba4fb1389494f363590f8a5da7f7fa481558978ba8f790c5", kill_on_drop: false }`
[INFO] [stdout] 69bebbb83f24be99ba4fb1389494f363590f8a5da7f7fa481558978ba8f790c5