[INFO] fetching crate string_telephone 0.0.3...
[INFO] documenting string_telephone-0.0.3 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate string_telephone 0.0.3 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate string_telephone 0.0.3 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate string_telephone 0.0.3
[INFO] finished tweaking crates.io crate string_telephone 0.0.3
[INFO] tweaked toml for crates.io crate string_telephone 0.0.3 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 47ab4a9fe01ca2af38bd3404739615765e2b6ffea5fc1503f3794644933a4217
[INFO] running `Command { std: "docker" "start" "-a" "47ab4a9fe01ca2af38bd3404739615765e2b6ffea5fc1503f3794644933a4217", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "47ab4a9fe01ca2af38bd3404739615765e2b6ffea5fc1503f3794644933a4217", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47ab4a9fe01ca2af38bd3404739615765e2b6ffea5fc1503f3794644933a4217", kill_on_drop: false }`
[INFO] [stdout] 47ab4a9fe01ca2af38bd3404739615765e2b6ffea5fc1503f3794644933a4217
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTFLAGS=--cap-lints=warn" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1e1e9f62cda23e1bb454f1bee30a69bf94eb6d3e9a02f69c12f388c21cc2cf58
[INFO] running `Command { std: "docker" "start" "-a" "1e1e9f62cda23e1bb454f1bee30a69bf94eb6d3e9a02f69c12f388c21cc2cf58", kill_on_drop: false }`
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking string_telephone v0.0.3 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting string_telephone v0.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `std::old_io`
[INFO] [stdout]  --> src/packet.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::old_io::{IoResult, IoError, OtherIoError};
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::old_io`
[INFO] [stdout]  --> src/packet.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::old_io::{IoResult, IoError, OtherIoError};
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::old_io`
[INFO] [stdout]  --> src/packet.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::old_io::BufReader;
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::old_io`
[INFO] [stdout]  --> src/packet.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::old_io::BufReader;
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::num::FromPrimitive`
[INFO] [stdout]  --> src/packet.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::num::FromPrimitive;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^ no `FromPrimitive` in `num`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::num::FromPrimitive`
[INFO] [stdout]  --> src/packet.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::num::FromPrimitive;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^ no `FromPrimitive` in `num`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `old_io` in `std`
[INFO] [stdout]  --> src/client.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::old_io::net::udp::UdpSocket;
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `old_io` in `std`
[INFO] [stdout]  --> src/client.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::old_io::net::udp::UdpSocket;
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `old_io` in `std`
[INFO] [stdout]  --> src/client.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::old_io::net::ip::SocketAddr;
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `old_io` in `std`
[INFO] [stdout]  --> src/client.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::old_io::net::ip::SocketAddr;
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::time::duration`
[INFO] [stdout]  --> src/shared.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::time::duration::Duration;
[INFO] [stdout]   |                ^^^^^^^^ could not find `duration` in `time`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::old_io`
[INFO] [stdout]  --> src/client.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::old_io::{IoResult, IoError, OtherIoError, TimedOut};
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::time::duration`
[INFO] [stdout]  --> src/shared.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::time::duration::Duration;
[INFO] [stdout]   |                ^^^^^^^^ could not find `duration` in `time`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::old_io`
[INFO] [stdout]  --> src/client.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::old_io::Timer;
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::old_io`
[INFO] [stdout]  --> src/client.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::old_io::{IoResult, IoError, OtherIoError, TimedOut};
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::sync::mpsc::Select`
[INFO] [stdout]  --> src/client.rs:5:64
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::sync::mpsc::{Sender, Receiver, TryRecvError, channel, Select};
[INFO] [stdout]   |                                                                ^^^^^^ no `Select` in `sync::mpsc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `old_io` in `std`
[INFO] [stdout]  --> src/server.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::old_io::net::udp::UdpSocket;
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `old_io` in `std`
[INFO] [stdout]  --> src/server.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::old_io::net::ip::{SocketAddr, Ipv4Addr, Ipv6Addr};
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::old_io`
[INFO] [stdout]  --> src/client.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::old_io::Timer;
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::time::duration`
[INFO] [stdout]  --> src/client.rs:7:16
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::time::duration::Duration;
[INFO] [stdout]   |                ^^^^^^^^ could not find `duration` in `time`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::sync::mpsc::Select`
[INFO] [stdout]  --> src/client.rs:5:64
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::sync::mpsc::{Sender, Receiver, TryRecvError, channel, Select};
[INFO] [stdout]   |                                                                ^^^^^^ no `Select` in `sync::mpsc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `old_io` in `std`
[INFO] [stdout]  --> src/server.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::old_io::net::udp::UdpSocket;
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `old_io` in `std`
[INFO] [stdout]  --> src/server.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::old_io::net::ip::{SocketAddr, Ipv4Addr, Ipv6Addr};
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::time::duration`
[INFO] [stdout]  --> src/client.rs:7:16
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::time::duration::Duration;
[INFO] [stdout]   |                ^^^^^^^^ could not find `duration` in `time`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::old_io`
[INFO] [stdout]  --> src/server.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::old_io::{IoResult, TimedOut};
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::sync::mpsc::Select`
[INFO] [stdout]  --> src/server.rs:4:64
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::sync::mpsc::{Sender, Receiver, TryRecvError, channel, Select};
[INFO] [stdout]   |                                                                ^^^^^^ no `Select` in `sync::mpsc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::old_io`
[INFO] [stdout]  --> src/server.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::old_io::{IoResult, TimedOut};
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::sync::mpsc::Select`
[INFO] [stdout]  --> src/server.rs:4:64
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::sync::mpsc::{Sender, Receiver, TryRecvError, channel, Select};
[INFO] [stdout]   |                                                                ^^^^^^ no `Select` in `sync::mpsc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot determine resolution for the derive macro `FromPrimitive`
[INFO] [stdout]  --> src/packet.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[derive(FromPrimitive, Clone, Show, PartialEq, Copy)]
[INFO] [stdout]   |          ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: import resolution is stuck, try simplifying macro imports
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find derive macro `Show` in this scope
[INFO] [stdout]  --> src/packet.rs:6:32
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[derive(FromPrimitive, Clone, Show, PartialEq, Copy)]
[INFO] [stdout]   |                                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot determine resolution for the derive macro `FromPrimitive`
[INFO] [stdout]  --> src/packet.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[derive(FromPrimitive, Clone, Show, PartialEq, Copy)]
[INFO] [stdout]   |          ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: import resolution is stuck, try simplifying macro imports
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find derive macro `Show` in this scope
[INFO] [stdout]  --> src/packet.rs:6:32
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[derive(FromPrimitive, Clone, Show, PartialEq, Copy)]
[INFO] [stdout]   |                                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `unsafe_destructor` in this scope
[INFO] [stdout]    --> src/client.rs:307:3
[INFO] [stdout]     |
[INFO] [stdout] 307 | #[unsafe_destructor]
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `unsafe_destructor` in this scope
[INFO] [stdout]    --> src/client.rs:307:3
[INFO] [stdout]     |
[INFO] [stdout] 307 | #[unsafe_destructor]
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `unsafe_destructor` in this scope
[INFO] [stdout]    --> src/server.rs:283:3
[INFO] [stdout]     |
[INFO] [stdout] 283 | #[unsafe_destructor]
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `unsafe_destructor` in this scope
[INFO] [stdout]    --> src/server.rs:283:3
[INFO] [stdout]     |
[INFO] [stdout] 283 | #[unsafe_destructor]
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/packet.rs:80:27
[INFO] [stdout]    |
[INFO] [stdout] 80 |         let protocol_id = try!(r.read_be_u32());
[INFO] [stdout]    |                           ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/packet.rs:81:27
[INFO] [stdout]    |
[INFO] [stdout] 81 |         let sequence_id = try!(r.read_be_u16());
[INFO] [stdout]    |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/packet.rs:82:27
[INFO] [stdout]    |
[INFO] [stdout] 82 |         let packet_type = try!(r.read_byte());
[INFO] [stdout]    |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/packet.rs:83:23
[INFO] [stdout]    |
[INFO] [stdout] 83 |         let content = try!(r.read_to_end());
[INFO] [stdout]    |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/packet.rs:105:9
[INFO] [stdout]     |
[INFO] [stdout] 105 |         try!(w.write_be_u32(self.protocol_id));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/packet.rs:106:9
[INFO] [stdout]     |
[INFO] [stdout] 106 |         try!(w.write_be_u16(self.sequence_id));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/packet.rs:107:9
[INFO] [stdout]     |
[INFO] [stdout] 107 |         try!(w.write_u8(self.packet_type as u8));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/packet.rs:110:17
[INFO] [stdout]     |
[INFO] [stdout] 110 |                 try!(w.write(content.as_slice()))
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(unsafe_destructor)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `unsafe_destructor`
[INFO] [stdout]  --> src/lib.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(unsafe_destructor)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 20 previous errors; 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0433, E0554, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 18 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0433.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `string_telephone` (lib) due to 21 previous errors; 8 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not document `string_telephone`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustdoc --crate-type lib --crate-name string_telephone src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=dd2706a3e1adfd51 -L dependency=/opt/rustwide/target/debug/deps --extern time=/opt/rustwide/target/debug/deps/libtime-5ce07f399f3174e5.rmeta --cap-lints=warn --crate-version 0.0.3` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "1e1e9f62cda23e1bb454f1bee30a69bf94eb6d3e9a02f69c12f388c21cc2cf58", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e1e9f62cda23e1bb454f1bee30a69bf94eb6d3e9a02f69c12f388c21cc2cf58", kill_on_drop: false }`
[INFO] [stdout] 1e1e9f62cda23e1bb454f1bee30a69bf94eb6d3e9a02f69c12f388c21cc2cf58
[INFO] documenting string_telephone-0.0.3 against beta-2023-12-22 for beta-1.76-rustdoc-1
[INFO] extracting crate string_telephone 0.0.3 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate string_telephone 0.0.3 on toolchain beta-2023-12-22
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate string_telephone 0.0.3
[INFO] finished tweaking crates.io crate string_telephone 0.0.3
[INFO] tweaked toml for crates.io crate string_telephone 0.0.3 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] afa238b16f2fe88f6410d670026ebe0bf36037aebb057dcc56cb2de096cac529
[INFO] running `Command { std: "docker" "start" "-a" "afa238b16f2fe88f6410d670026ebe0bf36037aebb057dcc56cb2de096cac529", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "afa238b16f2fe88f6410d670026ebe0bf36037aebb057dcc56cb2de096cac529", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "afa238b16f2fe88f6410d670026ebe0bf36037aebb057dcc56cb2de096cac529", kill_on_drop: false }`
[INFO] [stdout] afa238b16f2fe88f6410d670026ebe0bf36037aebb057dcc56cb2de096cac529
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "RUSTFLAGS=--cap-lints=warn" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b4e3e0eaaafad196fa685eab93f2c15f46868566eb139679146d1ac468a230f1
[INFO] running `Command { std: "docker" "start" "-a" "b4e3e0eaaafad196fa685eab93f2c15f46868566eb139679146d1ac468a230f1", kill_on_drop: false }`
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking string_telephone v0.0.3 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting string_telephone v0.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `std::old_io`
[INFO] [stdout]  --> src/packet.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::old_io::{IoResult, IoError, OtherIoError};
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::old_io`
[INFO] [stdout]  --> src/packet.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::old_io::{IoResult, IoError, OtherIoError};
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::old_io`
[INFO] [stdout]  --> src/packet.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::old_io::BufReader;
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::old_io`
[INFO] [stdout]  --> src/packet.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::old_io::BufReader;
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::num::FromPrimitive`
[INFO] [stdout]  --> src/packet.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::num::FromPrimitive;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^ no `FromPrimitive` in `num`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `old_io` in `std`
[INFO] [stdout]  --> src/client.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::old_io::net::udp::UdpSocket;
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::num::FromPrimitive`
[INFO] [stdout]  --> src/packet.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::num::FromPrimitive;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^ no `FromPrimitive` in `num`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `old_io` in `std`
[INFO] [stdout]  --> src/client.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::old_io::net::ip::SocketAddr;
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `old_io` in `std`
[INFO] [stdout]  --> src/client.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::old_io::net::udp::UdpSocket;
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::time::duration`
[INFO] [stdout]  --> src/shared.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::time::duration::Duration;
[INFO] [stdout]   |                ^^^^^^^^ could not find `duration` in `time`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `old_io` in `std`
[INFO] [stdout]  --> src/client.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::old_io::net::ip::SocketAddr;
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::old_io`
[INFO] [stdout]  --> src/client.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::old_io::{IoResult, IoError, OtherIoError, TimedOut};
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::time::duration`
[INFO] [stdout]  --> src/shared.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::time::duration::Duration;
[INFO] [stdout]   |                ^^^^^^^^ could not find `duration` in `time`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::old_io`
[INFO] [stdout]  --> src/client.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::old_io::{IoResult, IoError, OtherIoError, TimedOut};
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::old_io`
[INFO] [stdout]  --> src/client.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::old_io::Timer;
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::sync::mpsc::Select`
[INFO] [stdout]  --> src/client.rs:5:64
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::sync::mpsc::{Sender, Receiver, TryRecvError, channel, Select};
[INFO] [stdout]   |                                                                ^^^^^^ no `Select` in `sync::mpsc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::old_io`
[INFO] [stdout]  --> src/client.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::old_io::Timer;
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `old_io` in `std`
[INFO] [stdout]  --> src/server.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::old_io::net::udp::UdpSocket;
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `old_io` in `std`
[INFO] [stdout]  --> src/server.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::old_io::net::ip::{SocketAddr, Ipv4Addr, Ipv6Addr};
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::sync::mpsc::Select`
[INFO] [stdout]  --> src/client.rs:5:64
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::sync::mpsc::{Sender, Receiver, TryRecvError, channel, Select};
[INFO] [stdout]   |                                                                ^^^^^^ no `Select` in `sync::mpsc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::time::duration`
[INFO] [stdout]  --> src/client.rs:7:16
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::time::duration::Duration;
[INFO] [stdout]   |                ^^^^^^^^ could not find `duration` in `time`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `old_io` in `std`
[INFO] [stdout]  --> src/server.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::old_io::net::udp::UdpSocket;
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `old_io` in `std`
[INFO] [stdout]  --> src/server.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::old_io::net::ip::{SocketAddr, Ipv4Addr, Ipv6Addr};
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::old_io`
[INFO] [stdout]  --> src/server.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::old_io::{IoResult, TimedOut};
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::time::duration`
[INFO] [stdout]  --> src/client.rs:7:16
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::time::duration::Duration;
[INFO] [stdout]   |                ^^^^^^^^ could not find `duration` in `time`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::sync::mpsc::Select`
[INFO] [stdout]  --> src/server.rs:4:64
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::sync::mpsc::{Sender, Receiver, TryRecvError, channel, Select};
[INFO] [stdout]   |                                                                ^^^^^^ no `Select` in `sync::mpsc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::old_io`
[INFO] [stdout]  --> src/server.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::old_io::{IoResult, TimedOut};
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::sync::mpsc::Select`
[INFO] [stdout]  --> src/server.rs:4:64
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::sync::mpsc::{Sender, Receiver, TryRecvError, channel, Select};
[INFO] [stdout]   |                                                                ^^^^^^ no `Select` in `sync::mpsc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot determine resolution for the derive macro `FromPrimitive`
[INFO] [stdout]  --> src/packet.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[derive(FromPrimitive, Clone, Show, PartialEq, Copy)]
[INFO] [stdout]   |          ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: import resolution is stuck, try simplifying macro imports
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find derive macro `Show` in this scope
[INFO] [stdout]  --> src/packet.rs:6:32
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[derive(FromPrimitive, Clone, Show, PartialEq, Copy)]
[INFO] [stdout]   |                                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot determine resolution for the derive macro `FromPrimitive`
[INFO] [stdout]  --> src/packet.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[derive(FromPrimitive, Clone, Show, PartialEq, Copy)]
[INFO] [stdout]   |          ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: import resolution is stuck, try simplifying macro imports
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `unsafe_destructor` in this scope
[INFO] [stdout]    --> src/client.rs:307:3
[INFO] [stdout]     |
[INFO] [stdout] 307 | #[unsafe_destructor]
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find derive macro `Show` in this scope
[INFO] [stdout]  --> src/packet.rs:6:32
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[derive(FromPrimitive, Clone, Show, PartialEq, Copy)]
[INFO] [stdout]   |                                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `unsafe_destructor` in this scope
[INFO] [stdout]    --> src/server.rs:283:3
[INFO] [stdout]     |
[INFO] [stdout] 283 | #[unsafe_destructor]
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `unsafe_destructor` in this scope
[INFO] [stdout]    --> src/client.rs:307:3
[INFO] [stdout]     |
[INFO] [stdout] 307 | #[unsafe_destructor]
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `unsafe_destructor` in this scope
[INFO] [stdout]    --> src/server.rs:283:3
[INFO] [stdout]     |
[INFO] [stdout] 283 | #[unsafe_destructor]
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/packet.rs:80:27
[INFO] [stdout]    |
[INFO] [stdout] 80 |         let protocol_id = try!(r.read_be_u32());
[INFO] [stdout]    |                           ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/packet.rs:81:27
[INFO] [stdout]    |
[INFO] [stdout] 81 |         let sequence_id = try!(r.read_be_u16());
[INFO] [stdout]    |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/packet.rs:82:27
[INFO] [stdout]    |
[INFO] [stdout] 82 |         let packet_type = try!(r.read_byte());
[INFO] [stdout]    |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/packet.rs:83:23
[INFO] [stdout]    |
[INFO] [stdout] 83 |         let content = try!(r.read_to_end());
[INFO] [stdout]    |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/packet.rs:105:9
[INFO] [stdout]     |
[INFO] [stdout] 105 |         try!(w.write_be_u32(self.protocol_id));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/packet.rs:106:9
[INFO] [stdout]     |
[INFO] [stdout] 106 |         try!(w.write_be_u16(self.sequence_id));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/packet.rs:107:9
[INFO] [stdout]     |
[INFO] [stdout] 107 |         try!(w.write_u8(self.packet_type as u8));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/packet.rs:110:17
[INFO] [stdout]     |
[INFO] [stdout] 110 |                 try!(w.write(content.as_slice()))
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(unsafe_destructor)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `unsafe_destructor`
[INFO] [stdout]  --> src/lib.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(unsafe_destructor)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 20 previous errors; 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0433, E0554, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 18 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0433.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `string_telephone` (lib) due to 21 previous errors; 8 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not document `string_telephone`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/beta-2023-12-22-x86_64-unknown-linux-gnu/bin/rustdoc --crate-type lib --crate-name string_telephone src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=30703f626643009a -L dependency=/opt/rustwide/target/debug/deps --extern time=/opt/rustwide/target/debug/deps/libtime-ff50c40be62035d8.rmeta --cap-lints=warn --crate-version 0.0.3` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "b4e3e0eaaafad196fa685eab93f2c15f46868566eb139679146d1ac468a230f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4e3e0eaaafad196fa685eab93f2c15f46868566eb139679146d1ac468a230f1", kill_on_drop: false }`
[INFO] [stdout] b4e3e0eaaafad196fa685eab93f2c15f46868566eb139679146d1ac468a230f1
