[INFO] cloning repository https://github.com/suhr/conc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/suhr/conc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuhr%2Fconc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuhr%2Fconc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 572cdd54dd2c90795976d24f4da669a789b9024c
[INFO] documenting suhr/conc 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%2Fsuhr%2Fconc" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/suhr/conc 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/suhr/conc
[INFO] finished tweaking git repo https://github.com/suhr/conc
[INFO] tweaked toml for git repo https://github.com/suhr/conc written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/suhr/conc 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 4914c472f03f2c889dc69c6938f7a51ab0fd9fb7138b2db04326328b0eee2091
[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" "4914c472f03f2c889dc69c6938f7a51ab0fd9fb7138b2db04326328b0eee2091", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4914c472f03f2c889dc69c6938f7a51ab0fd9fb7138b2db04326328b0eee2091", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4914c472f03f2c889dc69c6938f7a51ab0fd9fb7138b2db04326328b0eee2091", kill_on_drop: false }`
[INFO] [stdout] 4914c472f03f2c889dc69c6938f7a51ab0fd9fb7138b2db04326328b0eee2091
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] a5c183f86b900042f7fa79a97799e0086792bf287f98e2adc0be52a0b3517bcd
[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" "a5c183f86b900042f7fa79a97799e0086792bf287f98e2adc0be52a0b3517bcd", 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]     Checking libc v0.2.30
[INFO] [stderr]     Checking regex-syntax v0.4.1
[INFO] [stderr]     Checking thread_local v0.3.4
[INFO] [stderr]     Checking memchr v1.0.1
[INFO] [stderr]     Checking aho-corasick v0.6.3
[INFO] [stderr]     Checking regex v0.2.2
[INFO] [stderr]  Documenting conc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `std::io::Chars`
[INFO] [stdout]  --> src/parser/lexer.rs:1:21
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{self, Chars, BufReader, Read};
[INFO] [stdout]   |                     ^^^^^ no `Chars` in `io`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `self::io::CharsError`
[INFO] [stdout]   --> src/parser/lexer.rs:86:23
[INFO] [stdout]    |
[INFO] [stdout] 86 |         use self::io::CharsError::*;
[INFO] [stdout]    |                       ^^^^^^^^^^ could not find `CharsError` in `io`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `CharsError` in module `io`
[INFO] [stdout]   --> src/parser/lexer.rs:84:31
[INFO] [stdout]    |
[INFO] [stdout] 84 | impl ::std::convert::From<io::CharsError> for LexerError {
[INFO] [stdout]    |                               ^^^^^^^^^^ not found in `io`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `CharsError` in module `io`
[INFO] [stdout]   --> src/parser/lexer.rs:85:22
[INFO] [stdout]    |
[INFO] [stdout] 85 |     fn from(err: io::CharsError) -> Self {
[INFO] [stdout]    |                      ^^^^^^^^^^ not found in `io`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(io)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0412, E0432, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0412`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `conc`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name conc src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern either=/opt/rustwide/target/debug/deps/libeither-bbe4c02094d090c9.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-e0b416b2062b490d.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-374352e7ca863a19.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "a5c183f86b900042f7fa79a97799e0086792bf287f98e2adc0be52a0b3517bcd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5c183f86b900042f7fa79a97799e0086792bf287f98e2adc0be52a0b3517bcd", kill_on_drop: false }`
[INFO] [stdout] a5c183f86b900042f7fa79a97799e0086792bf287f98e2adc0be52a0b3517bcd