[INFO] fetching crate fl2rust 0.3.2...
[INFO] checking fl2rust-0.3.2 against master#836c31742687ba4e2f857b5b698e1e9e6b67619c for pr-81789
[INFO] extracting crate fl2rust 0.3.2 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate fl2rust 0.3.2 on toolchain 836c31742687ba4e2f857b5b698e1e9e6b67619c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fl2rust 0.3.2
[INFO] finished tweaking crates.io crate fl2rust 0.3.2
[INFO] tweaked toml for crates.io crate fl2rust 0.3.2 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate fl2rust 0.3.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "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] 79e36df1cbf12fce730997364879222b48d6392d6345702f8e55d3a8a5b5dbdf
[INFO] running `Command { std: "docker" "start" "-a" "79e36df1cbf12fce730997364879222b48d6392d6345702f8e55d3a8a5b5dbdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "79e36df1cbf12fce730997364879222b48d6392d6345702f8e55d3a8a5b5dbdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79e36df1cbf12fce730997364879222b48d6392d6345702f8e55d3a8a5b5dbdf", kill_on_drop: false }`
[INFO] [stdout] 79e36df1cbf12fce730997364879222b48d6392d6345702f8e55d3a8a5b5dbdf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 352fd0e45ab4b6a7a7abc50d1a6287f68513bfefaf7a0bb731fc89726488d58d
[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" "352fd0e45ab4b6a7a7abc50d1a6287f68513bfefaf7a0bb731fc89726488d58d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking fl2rust v0.3.2 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling cmake v0.1.45
[INFO] [stderr]    Compiling fltk-sys v0.15.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking raw-window-handle v0.3.3
[INFO] [stderr]    Compiling fltk-derive v0.15.0
[INFO] [stderr]     Checking fltk v0.15.0
[INFO] [stdout] error[E0601]: `main` function not found in crate `myuifile`
[INFO] [stdout]   --> examples/myuifile.rs:4:1
[INFO] [stdout]    |
[INFO] [stdout] 4  | / #![allow(unused_variables)]
[INFO] [stdout] 5  | | #![allow(unused_mut)]
[INFO] [stdout] 6  | | #![allow(unused_imports)]
[INFO] [stdout] 7  | |
[INFO] [stdout] ...  |
[INFO] [stdout] 94 | |     }
[INFO] [stdout] 95 | | }
[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" "352fd0e45ab4b6a7a7abc50d1a6287f68513bfefaf7a0bb731fc89726488d58d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "352fd0e45ab4b6a7a7abc50d1a6287f68513bfefaf7a0bb731fc89726488d58d", kill_on_drop: false }`
[INFO] [stdout] 352fd0e45ab4b6a7a7abc50d1a6287f68513bfefaf7a0bb731fc89726488d58d