[INFO] fetching crate fl2rust 0.4.1...
[INFO] checking fl2rust-0.4.1 against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] extracting crate fl2rust 0.4.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate fl2rust 0.4.1 on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fl2rust 0.4.1
[INFO] finished tweaking crates.io crate fl2rust 0.4.1
[INFO] tweaked toml for crates.io crate fl2rust 0.4.1 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate fl2rust 0.4.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", 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] d48c5fbd9bffa292bdfc0247b01d11b08303947318f0fa936a3fcbcfeaf28f2f
[INFO] running `Command { std: "docker" "start" "-a" "d48c5fbd9bffa292bdfc0247b01d11b08303947318f0fa936a3fcbcfeaf28f2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d48c5fbd9bffa292bdfc0247b01d11b08303947318f0fa936a3fcbcfeaf28f2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d48c5fbd9bffa292bdfc0247b01d11b08303947318f0fa936a3fcbcfeaf28f2f", kill_on_drop: false }`
[INFO] [stdout] d48c5fbd9bffa292bdfc0247b01d11b08303947318f0fa936a3fcbcfeaf28f2f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 873a55dc7c4749da4b8c71bae2dcd3d7837d142b39b65427569c8b4f85ec78a6
[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" "873a55dc7c4749da4b8c71bae2dcd3d7837d142b39b65427569c8b4f85ec78a6", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking fl2rust v0.4.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling syn v1.0.71
[INFO] [stderr]     Checking raw-window-handle v0.3.3
[INFO] [stderr]     Checking fltk-sys v1.0.7
[INFO] [stderr]    Compiling fltk-derive v1.0.7
[INFO] [stderr]     Checking fltk v1.0.7
[INFO] [stdout] error[E0601]: `main` function not found in crate `myuifile`
[INFO] [stdout]   --> examples/myuifile.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout] 3  | / #![allow(unused_variables)]
[INFO] [stdout] 4  | | #![allow(unused_mut)]
[INFO] [stdout] 5  | | #![allow(unused_imports)]
[INFO] [stdout] 6  | | #![allow(clippy::needless_update)]
[INFO] [stdout] ...  |
[INFO] [stdout] 95 | |     }
[INFO] [stdout] 96 | | }
[INFO] [stdout]    | |_^ consider adding a `main` function to `examples/myuifile.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fl2rust`
[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] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "873a55dc7c4749da4b8c71bae2dcd3d7837d142b39b65427569c8b4f85ec78a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "873a55dc7c4749da4b8c71bae2dcd3d7837d142b39b65427569c8b4f85ec78a6", kill_on_drop: false }`
[INFO] [stdout] 873a55dc7c4749da4b8c71bae2dcd3d7837d142b39b65427569c8b4f85ec78a6