[INFO] cloning repository https://github.com/mcclure/rovr
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mcclure/rovr" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmcclure%2Frovr", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmcclure%2Frovr'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 67c4b854138fb0f6e86c6284268be0f08d872cbb
[INFO] checking mcclure/rovr against try#45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4 for pr-83744
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmcclure%2Frovr" "/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/mcclure/rovr on toolchain 45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mcclure/rovr
[INFO] finished tweaking git repo https://github.com/mcclure/rovr
[INFO] tweaked toml for git repo https://github.com/mcclure/rovr written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/mcclure/rovr already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: package.features
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded lua-src v542.0.0
[INFO] [stderr]   Downloaded luajit-src v210.1.2+resty29a66f7
[INFO] [stderr]   Downloaded mlua v0.5.1
[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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d24b50358557471a2e6fd9eb9f1207480e848096ad69c80cf949edd5ba7ce386
[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" "d24b50358557471a2e6fd9eb9f1207480e848096ad69c80cf949edd5ba7ce386", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d24b50358557471a2e6fd9eb9f1207480e848096ad69c80cf949edd5ba7ce386", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d24b50358557471a2e6fd9eb9f1207480e848096ad69c80cf949edd5ba7ce386", kill_on_drop: false }`
[INFO] [stdout] d24b50358557471a2e6fd9eb9f1207480e848096ad69c80cf949edd5ba7ce386
[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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "check" "--frozen" "--all" "--all-targets" "--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] 38f5051f40c766cdcc9adfba2269c4d00a625d507a7185ae83d001b28a805c4d
[INFO] running `Command { std: "docker" "start" "-a" "38f5051f40c766cdcc9adfba2269c4d00a625d507a7185ae83d001b28a805c4d", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: package.features
[INFO] [stderr]    Compiling cc v1.0.66
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking bstr v0.2.15
[INFO] [stderr]    Compiling luajit-src v210.1.2+resty29a66f7
[INFO] [stderr]    Compiling lua-src v542.0.0
[INFO] [stderr]    Compiling mlua v0.5.1
[INFO] [stderr]     Checking rovr v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `extension`
[INFO] [stdout]   --> src/api/filesystem.rs:38:6
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let extension = if (cfg!(target_os = "windows")) { ".dll" } else { ".so" };
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_extension`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `extension`
[INFO] [stdout]   --> src/api/filesystem.rs:38:6
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let extension = if (cfg!(target_os = "windows")) { ".dll" } else { ".so" };
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_extension`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_nonfatal`
[INFO] [stdout]   --> src/api/mod.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn print_nonfatal(result: core::Result<()>) -> LuaResult<bool> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `forgive_nonfatal`
[INFO] [stdout]   --> src/core/mod.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub fn forgive_nonfatal(result: Result<()>) -> Result<bool> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_nonfatal`
[INFO] [stdout]   --> src/api/mod.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn print_nonfatal(result: core::Result<()>) -> LuaResult<bool> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `forgive_nonfatal`
[INFO] [stdout]   --> src/core/mod.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub fn forgive_nonfatal(result: Result<()>) -> Result<bool> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 31.64s
[INFO] running `Command { std: "docker" "inspect" "38f5051f40c766cdcc9adfba2269c4d00a625d507a7185ae83d001b28a805c4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38f5051f40c766cdcc9adfba2269c4d00a625d507a7185ae83d001b28a805c4d", kill_on_drop: false }`
[INFO] [stdout] 38f5051f40c766cdcc9adfba2269c4d00a625d507a7185ae83d001b28a805c4d