[INFO] cloning repository https://github.com/yaahc/exploparse
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yaahc/exploparse" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyaahc%2Fexploparse", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyaahc%2Fexploparse'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f52a46bf85ca043836e319ed3edc83e420c42c9d
[INFO] documenting yaahc/exploparse 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%2Fyaahc%2Fexploparse" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yaahc/exploparse 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/yaahc/exploparse
[INFO] finished tweaking git repo https://github.com/yaahc/exploparse
[INFO] tweaked toml for git repo https://github.com/yaahc/exploparse written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/yaahc/exploparse 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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded color-backtrace v0.3.0
[INFO] [stderr]   Downloaded tracing-subscriber v0.2.2
[INFO] [stderr]   Downloaded spandoc v0.1.2
[INFO] [stderr]   Downloaded eyre v0.3.5
[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] eb7641e930a71f29479b394817027de1341674bf38af2c944a3df88032634ebf
[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" "eb7641e930a71f29479b394817027de1341674bf38af2c944a3df88032634ebf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eb7641e930a71f29479b394817027de1341674bf38af2c944a3df88032634ebf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb7641e930a71f29479b394817027de1341674bf38af2c944a3df88032634ebf", kill_on_drop: false }`
[INFO] [stdout] eb7641e930a71f29479b394817027de1341674bf38af2c944a3df88032634ebf
[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] 6bd174b77bc7cc4f40823194aacdf08591cae5dd603041dde304ebe38ca6504b
[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" "6bd174b77bc7cc4f40823194aacdf08591cae5dd603041dde304ebe38ca6504b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]     Checking regex-syntax v0.6.17
[INFO] [stderr]     Checking fallible-iterator v0.2.0
[INFO] [stderr]     Checking plain v0.2.3
[INFO] [stderr]    Compiling eyre v0.3.5
[INFO] [stderr]     Checking indenter v0.1.3
[INFO] [stderr]     Checking tracing-core v0.1.10
[INFO] [stderr]     Checking sharded-slab v0.0.8
[INFO] [stderr]    Compiling nom v5.1.1
[INFO] [stderr]     Checking findshlibs v0.5.0
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]    Compiling lexical-core v0.6.2
[INFO] [stderr]     Checking tracing-log v0.1.1
[INFO] [stderr]     Checking gimli v0.20.0
[INFO] [stderr]     Checking regex-automata v0.1.8
[INFO] [stderr]     Checking regex v1.3.5
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]     Checking addr2line v0.11.0
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling scroll_derive v0.10.1
[INFO] [stderr]    Compiling tracing-attributes v0.1.7
[INFO] [stderr]    Compiling spandoc v0.1.2
[INFO] [stderr]     Checking scroll v0.10.1
[INFO] [stderr]     Checking goblin v0.2.1
[INFO] [stderr]     Checking tracing v0.1.13
[INFO] [stderr]     Checking backtrace v0.3.45
[INFO] [stderr]     Checking color-backtrace v0.3.0
[INFO] [stderr]     Checking serde v1.0.104
[INFO] [stderr]     Checking serde_json v1.0.48
[INFO] [stderr]     Checking tracing-serde v0.1.1
[INFO] [stderr]     Checking bstr v0.2.11
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking tracing-subscriber v0.2.2
[INFO] [stderr]     Checking tracing-error v0.1.2
[INFO] [stderr]  Documenting exploparse v0.1.0 (/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(backtrace, error_iter)]
[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 `exploparse`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name exploparse 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 color_backtrace=/opt/rustwide/target/debug/deps/libcolor_backtrace-df884900d5bd6a4f.rmeta --extern csv=/opt/rustwide/target/debug/deps/libcsv-39aa67f4b9ad948d.rmeta --extern eyre=/opt/rustwide/target/debug/deps/libeyre-3e63c4245dbbecef.rmeta --extern indenter=/opt/rustwide/target/debug/deps/libindenter-f8d7abe0de658c6a.rmeta --extern nom=/opt/rustwide/target/debug/deps/libnom-562bc13deb5b2f9b.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-33e75d0855fd7d4e.rmeta --extern spandoc=/opt/rustwide/target/debug/deps/libspandoc-67587cdf1501d48d.so --extern tracing=/opt/rustwide/target/debug/deps/libtracing-44d2afefba96326b.rmeta --extern tracing_error=/opt/rustwide/target/debug/deps/libtracing_error-65dadfecaa441e03.rmeta --extern tracing_subscriber=/opt/rustwide/target/debug/deps/libtracing_subscriber-9117b0b3404b9eb8.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "6bd174b77bc7cc4f40823194aacdf08591cae5dd603041dde304ebe38ca6504b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6bd174b77bc7cc4f40823194aacdf08591cae5dd603041dde304ebe38ca6504b", kill_on_drop: false }`
[INFO] [stdout] 6bd174b77bc7cc4f40823194aacdf08591cae5dd603041dde304ebe38ca6504b