[INFO] cloning repository https://github.com/ChaosCat/MUDPortal
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ChaosCat/MUDPortal" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FChaosCat%2FMUDPortal", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FChaosCat%2FMUDPortal'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 224d20b8c42e9b8b1eb8a23f26b14550e735c051
[INFO] checking ChaosCat/MUDPortal against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FChaosCat%2FMUDPortal" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ChaosCat/MUDPortal
[INFO] finished tweaking git repo https://github.com/ChaosCat/MUDPortal
[INFO] tweaked toml for git repo https://github.com/ChaosCat/MUDPortal written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ChaosCat/MUDPortal on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ChaosCat/MUDPortal already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a606731911c515b085806408274326d3c7eb8b9d914c29a003f5d68b7af63b49
[INFO] running `Command { std: "docker" "start" "-a" "a606731911c515b085806408274326d3c7eb8b9d914c29a003f5d68b7af63b49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a606731911c515b085806408274326d3c7eb8b9d914c29a003f5d68b7af63b49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a606731911c515b085806408274326d3c7eb8b9d914c29a003f5d68b7af63b49", kill_on_drop: false }`
[INFO] [stdout] a606731911c515b085806408274326d3c7eb8b9d914c29a003f5d68b7af63b49
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=forbid -Dunmustuse_in_always_ok" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 388400c535419bc8df1eab420edb7c17e0823bfc52a70595e9a9159d39f4fe77
[INFO] running `Command { std: "docker" "start" "-a" "388400c535419bc8df1eab420edb7c17e0823bfc52a70595e9a9159d39f4fe77", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]     Checking telnet v0.1.4
[INFO] [stderr]     Checking thread-id v3.3.0
[INFO] [stderr]     Checking simple-logging v2.0.2
[INFO] [stderr]     Checking mud-portal v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Error`
[INFO] [stdout]  --> src/client/morgengrauen.rs:3:46
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::{stdout, stdin, Write, BufRead, Error};
[INFO] [stdout]   |                                              ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::any::Any`
[INFO] [stdout]  --> src/client/morgengrauen.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::any::Any;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/client/morgengrauen.rs:116:5
[INFO] [stdout]     |
[INFO] [stdout]  20 | /     loop {
[INFO] [stdout]  21 | |         curr_event = connection.read().expect("Failed reading from server");
[INFO] [stdout]  22 | |         match curr_event {
[INFO] [stdout]  23 | |             TelnetEvent::Data(data) => {
[INFO] [stdout] ...   |
[INFO] [stdout] 113 | |         input.clear();
[INFO] [stdout] 114 | |     }
[INFO] [stdout]     | |_____- any code following this expression is unreachable
[INFO] [stdout] 115 |
[INFO] [stdout] 116 |       Ok(())
[INFO] [stdout]     |       ^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let mut connection = match Telnet::connect(MORGENGRUEN_CONNECTION_INFO,
[INFO] [stdout]    |         ----^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MorgenGrauenClient` is never constructed
[INFO] [stdout]  --> src/client/morgengrauen.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct MorgenGrauenClient {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Error`
[INFO] [stdout]  --> src/client/morgengrauen.rs:3:46
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::{stdout, stdin, Write, BufRead, Error};
[INFO] [stdout]   |                                              ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::any::Any`
[INFO] [stdout]  --> src/client/morgengrauen.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::any::Any;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     client_loop(connection);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let _ = client_loop(connection);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/client/morgengrauen.rs:97:9
[INFO] [stdout]    |
[INFO] [stdout] 97 |         lout.flush();
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 97 |         let _ = lout.flush();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/client/morgengrauen.rs:105:21
[INFO] [stdout]     |
[INFO] [stdout] 105 |                     connection.write(input.as_bytes());
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 105 |                     let _ = connection.write(input.as_bytes());
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/network/telnet/comm.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 | /         match linemode {
[INFO] [stdout] 61 | |             Linemode::Mode => String::from("Mode"),
[INFO] [stdout] 62 | |             Linemode::ForwardMask => String::from("ForwardMask"),
[INFO] [stdout] 63 | |             Linemode::Slc => String::from("Slc"),
[INFO] [stdout] 64 | |             Linemode::Unrecognized(val) => val.to_string()
[INFO] [stdout] 65 | |         }.parse().unwrap()
[INFO] [stdout]    | |_________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/network/telnet/comm.rs:71:9
[INFO] [stdout]    |
[INFO] [stdout] 71 | /         match lmm {
[INFO] [stdout] 72 | |             LinemodeMode::Edit => String::from("Edit"),
[INFO] [stdout] 73 | |             LinemodeMode::Unrecognized(val) => val.to_string()
[INFO] [stdout] 74 | |         }.parse().unwrap()
[INFO] [stdout]    | |_________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/client/morgengrauen.rs:116:5
[INFO] [stdout]     |
[INFO] [stdout]  20 | /     loop {
[INFO] [stdout]  21 | |         curr_event = connection.read().expect("Failed reading from server");
[INFO] [stdout]  22 | |         match curr_event {
[INFO] [stdout]  23 | |             TelnetEvent::Data(data) => {
[INFO] [stdout] ...   |
[INFO] [stdout] 113 | |         input.clear();
[INFO] [stdout] 114 | |     }
[INFO] [stdout]     | |_____- any code following this expression is unreachable
[INFO] [stdout] 115 |
[INFO] [stdout] 116 |       Ok(())
[INFO] [stdout]     |       ^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let mut connection = match Telnet::connect(MORGENGRUEN_CONNECTION_INFO,
[INFO] [stdout]    |         ----^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MorgenGrauenClient` is never constructed
[INFO] [stdout]  --> src/client/morgengrauen.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct MorgenGrauenClient {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mud-portal` (bin "mud-portal") due to 2 previous errors; 8 warnings emitted
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     client_loop(connection);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let _ = client_loop(connection);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/client/morgengrauen.rs:97:9
[INFO] [stdout]    |
[INFO] [stdout] 97 |         lout.flush();
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 97 |         let _ = lout.flush();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/client/morgengrauen.rs:105:21
[INFO] [stdout]     |
[INFO] [stdout] 105 |                     connection.write(input.as_bytes());
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 105 |                     let _ = connection.write(input.as_bytes());
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/network/telnet/comm.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 | /         match linemode {
[INFO] [stdout] 61 | |             Linemode::Mode => String::from("Mode"),
[INFO] [stdout] 62 | |             Linemode::ForwardMask => String::from("ForwardMask"),
[INFO] [stdout] 63 | |             Linemode::Slc => String::from("Slc"),
[INFO] [stdout] 64 | |             Linemode::Unrecognized(val) => val.to_string()
[INFO] [stdout] 65 | |         }.parse().unwrap()
[INFO] [stdout]    | |_________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/network/telnet/comm.rs:71:9
[INFO] [stdout]    |
[INFO] [stdout] 71 | /         match lmm {
[INFO] [stdout] 72 | |             LinemodeMode::Edit => String::from("Edit"),
[INFO] [stdout] 73 | |             LinemodeMode::Unrecognized(val) => val.to_string()
[INFO] [stdout] 74 | |         }.parse().unwrap()
[INFO] [stdout]    | |_________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mud-portal` (bin "mud-portal" test) due to 2 previous errors; 8 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "388400c535419bc8df1eab420edb7c17e0823bfc52a70595e9a9159d39f4fe77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "388400c535419bc8df1eab420edb7c17e0823bfc52a70595e9a9159d39f4fe77", kill_on_drop: false }`
[INFO] [stdout] 388400c535419bc8df1eab420edb7c17e0823bfc52a70595e9a9159d39f4fe77