[INFO] cloning repository https://github.com/shahuwang/Rustunnel
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shahuwang/Rustunnel" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshahuwang%2FRustunnel", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshahuwang%2FRustunnel'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 208657ea45aea8a7d7284d3b5d9aedf252ebdd95
[INFO] documenting shahuwang/Rustunnel 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%2Fshahuwang%2FRustunnel" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/shahuwang/Rustunnel 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/shahuwang/Rustunnel
[INFO] finished tweaking git repo https://github.com/shahuwang/Rustunnel
[INFO] tweaked toml for git repo https://github.com/shahuwang/Rustunnel written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/shahuwang/Rustunnel 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] error: the lock file /workspace/builds/worker-8/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] edca5f0bc562d49f8cd7c173359483ea922f8f830f48fde74ad5fec52c8ffcce
[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" "edca5f0bc562d49f8cd7c173359483ea922f8f830f48fde74ad5fec52c8ffcce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "edca5f0bc562d49f8cd7c173359483ea922f8f830f48fde74ad5fec52c8ffcce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "edca5f0bc562d49f8cd7c173359483ea922f8f830f48fde74ad5fec52c8ffcce", kill_on_drop: false }`
[INFO] [stdout] edca5f0bc562d49f8cd7c173359483ea922f8f830f48fde74ad5fec52c8ffcce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 0df4016813794cd91943d9247134fba3211f63f9bd9dc2f3cd980ed82a4db926
[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" "0df4016813794cd91943d9247134fba3211f63f9bd9dc2f3cd980ed82a4db926", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]     Checking bincode v1.3.1
[INFO] [stderr]  Documenting Rustunnel v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved imports `std::io::Chars`, `std::io::Tee`
[INFO] [stdout]  --> src/conn.rs:8:17
[INFO] [stdout]   |
[INFO] [stdout] 8 |                 Chars, Chain, Tee, Take,
[INFO] [stdout]   |                 ^^^^^         ^^^ no `Tee` in `io`
[INFO] [stdout]   |                 |
[INFO] [stdout]   |                 no `Chars` in `io`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `bincode::SizeLimit`
[INFO] [stdout]   --> src/conn.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use bincode::SizeLimit;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^ no `SizeLimit` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `bincode::rustc_serialize`
[INFO] [stdout]   --> src/conn.rs:15:14
[INFO] [stdout]    |
[INFO] [stdout] 15 | use bincode::rustc_serialize::{encode, decode_from, DecodingResult};
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^ could not find `rustc_serialize` in `bincode`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `Rustunnel`.
[INFO] [stdout] error[E0407]: method `chars` is not a member of trait `Read`
[INFO] [stdout]    --> src/conn.rs:100:5
[INFO] [stdout]     |
[INFO] [stdout] 100 | /     fn chars(self) -> Chars<Self> where Self: Sized{
[INFO] [stdout] 101 | |         unimplemented!();
[INFO] [stdout] 102 | |         // self.reader.chars()
[INFO] [stdout] 103 | |     }
[INFO] [stdout]     | |_____^ not a member of trait `Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] error[E0407]: method `tee` is not a member of trait `Read`
[INFO] [stdout]    --> src/conn.rs:112:5
[INFO] [stdout]     |
[INFO] [stdout] 112 | /     fn tee<W:Write>(self, out: W) -> Tee<Self, W> where Self:Sized{
[INFO] [stdout] 113 | |         unimplemented!();
[INFO] [stdout] 114 | |         // self.reader.tee(out)
[INFO] [stdout] 115 | |     }
[INFO] [stdout]     | |_____^ not a member of trait `Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(io)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name Rustunnel 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 bincode=/opt/rustwide/target/debug/deps/libbincode-e6e3d5e940c1e286.rmeta --extern crypto=/opt/rustwide/target/debug/deps/libcrypto-3dca84d7ed372bb7.rmeta --extern rustc_serialize=/opt/rustwide/target/debug/deps/librustc_serialize-eddfb9427ca0b1f2.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 7 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0407, E0432, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0407`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "0df4016813794cd91943d9247134fba3211f63f9bd9dc2f3cd980ed82a4db926", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0df4016813794cd91943d9247134fba3211f63f9bd9dc2f3cd980ed82a4db926", kill_on_drop: false }`
[INFO] [stdout] 0df4016813794cd91943d9247134fba3211f63f9bd9dc2f3cd980ed82a4db926