[INFO] cloning repository https://github.com/kevinwilde/chat_server
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kevinwilde/chat_server" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkevinwilde%2Fchat_server", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkevinwilde%2Fchat_server'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f8e45c687d8d0e7fbed9842f1c590b3b55703cff
[INFO] testing kevinwilde/chat_server against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkevinwilde%2Fchat_server" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kevinwilde/chat_server on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kevinwilde/chat_server
[INFO] finished tweaking git repo https://github.com/kevinwilde/chat_server
[INFO] tweaked toml for git repo https://github.com/kevinwilde/chat_server written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/kevinwilde/chat_server already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8fe4b1271ae05441642806f491ce8212cadaa866ab4a8916f0ef8b34a72e581c
[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" "8fe4b1271ae05441642806f491ce8212cadaa866ab4a8916f0ef8b34a72e581c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8fe4b1271ae05441642806f491ce8212cadaa866ab4a8916f0ef8b34a72e581c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fe4b1271ae05441642806f491ce8212cadaa866ab4a8916f0ef8b34a72e581c", kill_on_drop: false }`
[INFO] [stdout] 8fe4b1271ae05441642806f491ce8212cadaa866ab4a8916f0ef8b34a72e581c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9208998eb9cdcd41900e8abc2943336b5e1173af4dd99f261b5b5da11fab2bbf
[INFO] running `Command { std: "docker" "start" "-a" "9208998eb9cdcd41900e8abc2943336b5e1173af4dd99f261b5b5da11fab2bbf", kill_on_drop: false }`
[INFO] [stderr]    Compiling chat_server v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `size`
[INFO] [stdout]   --> src/roommap.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn size(&self) -> usize {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/client.rs:125:9
[INFO] [stdout]     |
[INFO] [stdout] 125 |         &self.send_messages(server, sndr);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 125 |         let _ = &self.send_messages(server, sndr);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.69s
[INFO] running `Command { std: "docker" "inspect" "9208998eb9cdcd41900e8abc2943336b5e1173af4dd99f261b5b5da11fab2bbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9208998eb9cdcd41900e8abc2943336b5e1173af4dd99f261b5b5da11fab2bbf", kill_on_drop: false }`
[INFO] [stdout] 9208998eb9cdcd41900e8abc2943336b5e1173af4dd99f261b5b5da11fab2bbf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b3f1fb166ac180f830a7222bf79c6305e0514c9d0e1ea9493208bef30685a928
[INFO] running `Command { std: "docker" "start" "-a" "b3f1fb166ac180f830a7222bf79c6305e0514c9d0e1ea9493208bef30685a928", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling chat_server v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `size`
[INFO] [stdout]   --> src/roommap.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn size(&self) -> usize {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/client.rs:125:9
[INFO] [stdout]     |
[INFO] [stdout] 125 |         &self.send_messages(server, sndr);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 125 |         let _ = &self.send_messages(server, sndr);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.10s
[INFO] running `Command { std: "docker" "inspect" "b3f1fb166ac180f830a7222bf79c6305e0514c9d0e1ea9493208bef30685a928", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3f1fb166ac180f830a7222bf79c6305e0514c9d0e1ea9493208bef30685a928", kill_on_drop: false }`
[INFO] [stdout] b3f1fb166ac180f830a7222bf79c6305e0514c9d0e1ea9493208bef30685a928
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d626ea90702c3007e2e4673b9b8e89441da6c33ff7e6a9393d0a4c6c8bdb538b
[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" "d626ea90702c3007e2e4673b9b8e89441da6c33ff7e6a9393d0a4c6c8bdb538b", kill_on_drop: false }`
[INFO] [stderr] warning: associated function is never used: `size`
[INFO] [stderr]   --> src/roommap.rs:36:12
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn size(&self) -> usize {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]    --> src/client.rs:125:9
[INFO] [stderr]     |
[INFO] [stderr] 125 |         &self.send_messages(server, sndr);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 125 |         let _ = &self.send_messages(server, sndr);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `chat_server` (bin "chat_server" test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/chat_server-7ac460f8664a8c52)
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test command::command_tests::parse_command_test_list ... ok
[INFO] [stdout] test command::command_tests::parse_command_test_logoff ... ok
[INFO] [stdout] test command::command_tests::parse_command_test_help ... ok
[INFO] [stdout] test command::command_tests::parse_command_test_q ... ok
[INFO] [stdout] test command::command_tests::parse_command_test_quit ... ok
[INFO] [stdout] test command::command_tests::parse_command_test_unrecognized ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d626ea90702c3007e2e4673b9b8e89441da6c33ff7e6a9393d0a4c6c8bdb538b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d626ea90702c3007e2e4673b9b8e89441da6c33ff7e6a9393d0a4c6c8bdb538b", kill_on_drop: false }`
[INFO] [stdout] d626ea90702c3007e2e4673b9b8e89441da6c33ff7e6a9393d0a4c6c8bdb538b