[INFO] cloning repository https://github.com/HADMARINE/rust-udp-test
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/HADMARINE/rust-udp-test" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHADMARINE%2Frust-udp-test", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHADMARINE%2Frust-udp-test'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 74ea55fecb5e8dae15631b79b5be38ef7651604b
[INFO] testing HADMARINE/rust-udp-test against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHADMARINE%2Frust-udp-test" "/workspace/builds/worker-117/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-117/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/HADMARINE/rust-udp-test 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/HADMARINE/rust-udp-test
[INFO] finished tweaking git repo https://github.com/HADMARINE/rust-udp-test
[INFO] tweaked toml for git repo https://github.com/HADMARINE/rust-udp-test written to /workspace/builds/worker-117/source/Cargo.toml
[INFO] crate git repo https://github.com/HADMARINE/rust-udp-test 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] [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-117/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-117/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ff39db66d1ded991eb4a24b8c12706d860a6aaca8d113269206e36797d4d76b2
[INFO] running `Command { std: "docker" "start" "-a" "ff39db66d1ded991eb4a24b8c12706d860a6aaca8d113269206e36797d4d76b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ff39db66d1ded991eb4a24b8c12706d860a6aaca8d113269206e36797d4d76b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff39db66d1ded991eb4a24b8c12706d860a6aaca8d113269206e36797d4d76b2", kill_on_drop: false }`
[INFO] [stdout] ff39db66d1ded991eb4a24b8c12706d860a6aaca8d113269206e36797d4d76b2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-117/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-117/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 650a16f99d28f4065175bf8eb548fb7fd34cde60050218c324a333cc21fb6d9a
[INFO] running `Command { std: "docker" "start" "-a" "650a16f99d28f4065175bf8eb548fb7fd34cde60050218c324a333cc21fb6d9a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling tokio v1.11.0
[INFO] [stderr]    Compiling portpicker v0.1.1
[INFO] [stderr]    Compiling mio v0.7.13
[INFO] [stderr]    Compiling tokio-macros v1.3.0
[INFO] [stderr]    Compiling rust-udp-test v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:78:43
[INFO] [stdout]    |
[INFO] [stdout] 78 |     fn delete_udp_channel(ch_num: u32) -> Result<_, Box<dyn std::error::Error>> {}
[INFO] [stdout]    |        ------------------                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected enum `Result`, found `()`
[INFO] [stdout]    |        |
[INFO] [stdout]    |        implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout]    |
[INFO] [stdout]    = note:   expected enum `Result<_, Box<(dyn std::error::Error + 'static)>>`
[INFO] [stdout]            found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0121]: the type placeholder `_` is not allowed within types on item signatures for return types
[INFO] [stdout]   --> src/main.rs:78:50
[INFO] [stdout]    |
[INFO] [stdout] 78 |     fn delete_udp_channel(ch_num: u32) -> Result<_, Box<dyn std::error::Error>> {}
[INFO] [stdout]    |                                           -------^-----------------------------
[INFO] [stdout]    |                                           |      |
[INFO] [stdout]    |                                           |      not allowed in type signatures
[INFO] [stdout]    |                                           help: replace with the correct return type: `Result<[type error], Box<(dyn std::error::Error + 'static)>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0121, E0308.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0121`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-udp-test` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "650a16f99d28f4065175bf8eb548fb7fd34cde60050218c324a333cc21fb6d9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "650a16f99d28f4065175bf8eb548fb7fd34cde60050218c324a333cc21fb6d9a", kill_on_drop: false }`
[INFO] [stdout] 650a16f99d28f4065175bf8eb548fb7fd34cde60050218c324a333cc21fb6d9a