[INFO] cloning repository https://github.com/RebeccaSyria/mud
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/RebeccaSyria/mud" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRebeccaSyria%2Fmud", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRebeccaSyria%2Fmud'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b8f2a8d5def731212f3b69b4757de84f288e685a
[INFO] testing RebeccaSyria/mud against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRebeccaSyria%2Fmud" "/workspace/builds/worker-83/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-83/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/RebeccaSyria/mud on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/RebeccaSyria/mud
[INFO] finished tweaking git repo https://github.com/RebeccaSyria/mud
[INFO] tweaked toml for git repo https://github.com/RebeccaSyria/mud written to /workspace/builds/worker-83/source/Cargo.toml
[INFO] crate git repo https://github.com/RebeccaSyria/mud already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-83/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-83/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3f8d33da405c145f5de0a3463df873d86bd0ac9ee38405235961afeb9c6e417e
[INFO] running `Command { std: "docker" "start" "-a" "3f8d33da405c145f5de0a3463df873d86bd0ac9ee38405235961afeb9c6e417e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3f8d33da405c145f5de0a3463df873d86bd0ac9ee38405235961afeb9c6e417e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f8d33da405c145f5de0a3463df873d86bd0ac9ee38405235961afeb9c6e417e", kill_on_drop: false }`
[INFO] [stdout] 3f8d33da405c145f5de0a3463df873d86bd0ac9ee38405235961afeb9c6e417e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-83/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-83/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 87e88fbbc8708e237c5faad7c43679c6f08a3cd87f3f2d1ba90d317ffaa79de1
[INFO] running `Command { std: "docker" "start" "-a" "87e88fbbc8708e237c5faad7c43679c6f08a3cd87f3f2d1ba90d317ffaa79de1", kill_on_drop: false }`
[INFO] [stderr]    Compiling mud v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `output` is never read
[INFO] [stdout]   --> src/main.rs:45:21
[INFO] [stdout]    |
[INFO] [stdout] 45 |             let mut output = "";
[INFO] [stdout]    |                     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `room_name`
[INFO] [stdout]  --> src/room.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     room_name: String,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `room_id`
[INFO] [stdout]  --> src/room.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     room_id: i32,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `messages`
[INFO] [stdout]  --> src/room.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     messages: String,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/main.rs:22:30
[INFO] [stdout]    |
[INFO] [stdout] 22 |             Err(e) => panic!(e),
[INFO] [stdout]    |                              ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]    = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 22 |             Err(e) => panic!("{}", e),
[INFO] [stdout]    |                              ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 22 |             Err(e) => std::panic::panic_any(e),
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.37s
[INFO] running `Command { std: "docker" "inspect" "87e88fbbc8708e237c5faad7c43679c6f08a3cd87f3f2d1ba90d317ffaa79de1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87e88fbbc8708e237c5faad7c43679c6f08a3cd87f3f2d1ba90d317ffaa79de1", kill_on_drop: false }`
[INFO] [stdout] 87e88fbbc8708e237c5faad7c43679c6f08a3cd87f3f2d1ba90d317ffaa79de1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-83/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-83/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 64979c0e74d07d45040e06ca91f23f5801e36e20702ad964398619617e83fb1a
[INFO] running `Command { std: "docker" "start" "-a" "64979c0e74d07d45040e06ca91f23f5801e36e20702ad964398619617e83fb1a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling mud v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `output` is never read
[INFO] [stdout]   --> src/main.rs:45:21
[INFO] [stdout]    |
[INFO] [stdout] 45 |             let mut output = "";
[INFO] [stdout]    |                     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `room_name`
[INFO] [stdout]  --> src/room.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     room_name: String,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `room_id`
[INFO] [stdout]  --> src/room.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     room_id: i32,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `messages`
[INFO] [stdout]  --> src/room.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     messages: String,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/main.rs:22:30
[INFO] [stdout]    |
[INFO] [stdout] 22 |             Err(e) => panic!(e),
[INFO] [stdout]    |                              ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]    = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 22 |             Err(e) => panic!("{}", e),
[INFO] [stdout]    |                              ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 22 |             Err(e) => std::panic::panic_any(e),
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.57s
[INFO] running `Command { std: "docker" "inspect" "64979c0e74d07d45040e06ca91f23f5801e36e20702ad964398619617e83fb1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64979c0e74d07d45040e06ca91f23f5801e36e20702ad964398619617e83fb1a", kill_on_drop: false }`
[INFO] [stdout] 64979c0e74d07d45040e06ca91f23f5801e36e20702ad964398619617e83fb1a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-83/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-83/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e4f535488bb164e2dfe954e13559fc0d6193dd5e38f1ecb368a41d75b7406769
[INFO] running `Command { std: "docker" "start" "-a" "e4f535488bb164e2dfe954e13559fc0d6193dd5e38f1ecb368a41d75b7406769", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: value assigned to `output` is never read
[INFO] [stderr]   --> src/main.rs:45:21
[INFO] [stderr]    |
[INFO] [stderr] 45 |             let mut output = "";
[INFO] [stderr]    |                     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `room_name`
[INFO] [stderr]  --> src/room.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 |     room_name: String,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `room_id`
[INFO] [stderr]  --> src/room.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     room_id: i32,
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `messages`
[INFO] [stderr]  --> src/room.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     messages: String,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]   --> src/main.rs:22:30
[INFO] [stderr]    |
[INFO] [stderr] 22 |             Err(e) => panic!(e),
[INFO] [stderr]    |                              ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stderr]    = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stderr] help: add a "{}" format string to Display the message
[INFO] [stderr]    |
[INFO] [stderr] 22 |             Err(e) => panic!("{}", e),
[INFO] [stderr]    |                              ^^^^^
[INFO] [stderr] help: or use std::panic::panic_any instead
[INFO] [stderr]    |
[INFO] [stderr] 22 |             Err(e) => std::panic::panic_any(e),
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `mud` (bin "mud" test) generated 5 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 19.72s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/mud-5316204f070b5366)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e4f535488bb164e2dfe954e13559fc0d6193dd5e38f1ecb368a41d75b7406769", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4f535488bb164e2dfe954e13559fc0d6193dd5e38f1ecb368a41d75b7406769", kill_on_drop: false }`
[INFO] [stdout] e4f535488bb164e2dfe954e13559fc0d6193dd5e38f1ecb368a41d75b7406769