[INFO] cloning repository https://github.com/echochamber/rust_chat
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/echochamber/rust_chat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fechochamber%2Frust_chat", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fechochamber%2Frust_chat'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 254f76a923455cf4b4a0928e5d5eabe1ae8aeb1a
[INFO] checking echochamber/rust_chat against try#72f88fc4e9458f89516a0b8b0868f3718aec5b47 for pr-74989
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fechochamber%2Frust_chat" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/echochamber/rust_chat on toolchain 72f88fc4e9458f89516a0b8b0868f3718aec5b47
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/echochamber/rust_chat
[INFO] finished tweaking git repo https://github.com/echochamber/rust_chat
[INFO] tweaked toml for git repo https://github.com/echochamber/rust_chat written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/echochamber/rust_chat already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] error: the lock file /workspace/builds/worker-0/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[INFO] the lockfile is outdated, regenerating it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" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 334e82b0d05b0a9b045b1094689d0a7635f5aa17608043986279c666e11f4b81
[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" "334e82b0d05b0a9b045b1094689d0a7635f5aa17608043986279c666e11f4b81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "334e82b0d05b0a9b045b1094689d0a7635f5aa17608043986279c666e11f4b81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "334e82b0d05b0a9b045b1094689d0a7635f5aa17608043986279c666e11f4b81", kill_on_drop: false }`
[INFO] [stdout] 334e82b0d05b0a9b045b1094689d0a7635f5aa17608043986279c666e11f4b81
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "-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" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2eb78db15ffd90d290202e93283c14939410bfd4693f004f85bddb1b98c70945
[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" "2eb78db15ffd90d290202e93283c14939410bfd4693f004f85bddb1b98c70945", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]     Checking libc v0.1.12
[INFO] [stderr]     Checking bitflags v0.1.1
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking nix v0.3.10
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking winapi v0.1.23
[INFO] [stderr]     Checking mio v0.4.4
[INFO] [stderr]     Checking simple_chat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `EventLoop`, `Token`
[INFO] [stdout]  --> src/chat_server/connection.rs:9:11
[INFO] [stdout]   |
[INFO] [stdout] 9 | use mio::{Token, EventLoop, EventSet, TryRead, TryWrite, PollOpt};
[INFO] [stdout]   |           ^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `SERVER_TOKEN`
[INFO] [stdout]   --> src/chat_server/mod.rs:11:20
[INFO] [stdout]    |
[INFO] [stdout] 11 | use self::server::{SERVER_TOKEN, ChatServer};
[INFO] [stdout]    |                    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `EventLoop`, `Token`
[INFO] [stdout]  --> src/chat_server/connection.rs:9:11
[INFO] [stdout]   |
[INFO] [stdout] 9 | use mio::{Token, EventLoop, EventSet, TryRead, TryWrite, PollOpt};
[INFO] [stdout]   |           ^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `SERVER_TOKEN`
[INFO] [stdout]   --> src/chat_server/mod.rs:11:20
[INFO] [stdout]    |
[INFO] [stdout] 11 | use self::server::{SERVER_TOKEN, ChatServer};
[INFO] [stdout]    |                    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/chat_server/connection.rs:100:21
[INFO] [stdout]     |
[INFO] [stdout] 100 |                        return match String::from_utf8(read_buf) {
[INFO] [stdout]     |  ______________________^______-
[INFO] [stdout]     | | _____________________|
[INFO] [stdout]     | ||
[INFO] [stdout] 101 | ||                         Ok(message) => {
[INFO] [stdout] 102 | ||                             return Ok(Some(message));
[INFO] [stdout] 103 | ||                         },
[INFO] [stdout] ...   ||
[INFO] [stdout] 106 | ||                         }
[INFO] [stdout] 107 | ||                     }
[INFO] [stdout]     | ||                     ^
[INFO] [stdout]     | ||_____________________|
[INFO] [stdout]     | |______________________unreachable expression
[INFO] [stdout]     |                        any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/chat_server/connection.rs:100:21
[INFO] [stdout]     |
[INFO] [stdout] 100 |                        return match String::from_utf8(read_buf) {
[INFO] [stdout]     |  ______________________^______-
[INFO] [stdout]     | | _____________________|
[INFO] [stdout]     | ||
[INFO] [stdout] 101 | ||                         Ok(message) => {
[INFO] [stdout] 102 | ||                             return Ok(Some(message));
[INFO] [stdout] 103 | ||                         },
[INFO] [stdout] ...   ||
[INFO] [stdout] 106 | ||                         }
[INFO] [stdout] 107 | ||                     }
[INFO] [stdout]     | ||                     ^
[INFO] [stdout]     | ||_____________________|
[INFO] [stdout]     | |______________________unreachable expression
[INFO] [stdout]     |                        any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `ip_addr` has been stable since 1.7.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(ip_addr)]
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `convert`
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(convert)]
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `simple_chat`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: the feature `ip_addr` has been stable since 1.7.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(ip_addr)]
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `convert`
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(convert)]
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "2eb78db15ffd90d290202e93283c14939410bfd4693f004f85bddb1b98c70945", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2eb78db15ffd90d290202e93283c14939410bfd4693f004f85bddb1b98c70945", kill_on_drop: false }`
[INFO] [stdout] 2eb78db15ffd90d290202e93283c14939410bfd4693f004f85bddb1b98c70945
