[INFO] cloning repository https://github.com/charmander/iptooled
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/charmander/iptooled" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcharmander%2Fiptooled", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcharmander%2Fiptooled'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 085e92154359cad91a183ebcf25a67df3a3f992a
[INFO] checking charmander/iptooled against master#8007b506ac5da629f223b755f5a5391edd5f6d01 for pr-88041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcharmander%2Fiptooled" "/workspace/builds/worker-19/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-19/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/charmander/iptooled on toolchain 8007b506ac5da629f223b755f5a5391edd5f6d01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/charmander/iptooled
[INFO] finished tweaking git repo https://github.com/charmander/iptooled
[INFO] tweaked toml for git repo https://github.com/charmander/iptooled written to /workspace/builds/worker-19/source/Cargo.toml
[INFO] crate git repo https://github.com/charmander/iptooled already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "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-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 59dd4d8302631f6d0ac50dae0783edee6056da8e45356a04ffa9de7192860083
[INFO] running `Command { std: "docker" "start" "-a" "59dd4d8302631f6d0ac50dae0783edee6056da8e45356a04ffa9de7192860083", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "59dd4d8302631f6d0ac50dae0783edee6056da8e45356a04ffa9de7192860083", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59dd4d8302631f6d0ac50dae0783edee6056da8e45356a04ffa9de7192860083", kill_on_drop: false }`
[INFO] [stdout] 59dd4d8302631f6d0ac50dae0783edee6056da8e45356a04ffa9de7192860083
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3f252b5f1df18ac8226cf7670036bfec28abda4372bd7f20ad59185b4167e0df
[INFO] running `Command { std: "docker" "start" "-a" "3f252b5f1df18ac8226cf7670036bfec28abda4372bd7f20ad59185b4167e0df", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling getrandom v0.1.13
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking regex-syntax v0.6.12
[INFO] [stderr]     Checking bytes v0.5.3
[INFO] [stderr]     Checking pin-project-lite v0.1.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking tokio v0.2.4
[INFO] [stderr]     Checking rand_distr v0.2.2
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]     Checking iptooled v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0658]: the `!` type is experimental
[INFO] [stdout]   --> src/main.rs:52:21
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let result: Result<!, ReadError> = try {
[INFO] [stdout]    |                        ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #35121 <https://github.com/rust-lang/rust/issues/35121> for more information
[INFO] [stdout]    = help: add `#![feature(never_type)]` to the crate attributes to enable
[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 E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `iptooled` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "3f252b5f1df18ac8226cf7670036bfec28abda4372bd7f20ad59185b4167e0df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f252b5f1df18ac8226cf7670036bfec28abda4372bd7f20ad59185b4167e0df", kill_on_drop: false }`
[INFO] [stdout] 3f252b5f1df18ac8226cf7670036bfec28abda4372bd7f20ad59185b4167e0df