[INFO] cloning repository https://github.com/ksv1986/rchd-nbd
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ksv1986/rchd-nbd" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fksv1986%2Frchd-nbd", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fksv1986%2Frchd-nbd'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5a1da748891e6f0dc46ef45119742ec48ffb9c76
[INFO] testing ksv1986/rchd-nbd against 1.100.0-beta.1+cargoflags=--release for beta-release-1.100-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fksv1986%2Frchd-nbd" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ksv1986/rchd-nbd
[INFO] finished tweaking git repo https://github.com/ksv1986/rchd-nbd
[INFO] tweaked toml for git repo https://github.com/ksv1986/rchd-nbd written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ksv1986/rchd-nbd on toolchain 1.100.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ksv1986/rchd-nbd already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 9e37a7d78521c568b6e9e3f06be3b44d15184f319ef16a4c6dc2de9245346c5e
[INFO] running `Command { std: "docker" "start" "9e37a7d78521c568b6e9e3f06be3b44d15184f319ef16a4c6dc2de9245346c5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9e37a7d78521c568b6e9e3f06be3b44d15184f319ef16a4c6dc2de9245346c5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "9e37a7d78521c568b6e9e3f06be3b44d15184f319ef16a4c6dc2de9245346c5e" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9e37a7d78521c568b6e9e3f06be3b44d15184f319ef16a4c6dc2de9245346c5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "9e37a7d78521c568b6e9e3f06be3b44d15184f319ef16a4c6dc2de9245346c5e" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling crc-catalog v2.2.0
[INFO] [stderr]    Compiling claxon v0.4.3
[INFO] [stderr]    Compiling text_io v0.1.12
[INFO] [stderr]    Compiling arrayvec v0.7.2
[INFO] [stderr]    Compiling bitreader v0.3.6
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling miniz_oxide v0.6.2
[INFO] [stderr]    Compiling crc v3.0.1
[INFO] [stderr]    Compiling lzma-rs-perf-exp v0.2.1
[INFO] [stderr]    Compiling nbd v0.3.0
[INFO] [stderr]    Compiling flate2 v1.0.25
[INFO] [stderr]    Compiling num-derive v0.3.3
[INFO] [stderr]    Compiling chd v0.2.3
[INFO] [stderr]    Compiling chdnbd v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: the trait bound `!: Default` is not satisfied
[INFO] [stdout]   --> src/main.rs:27:15
[INFO] [stdout]    |
[INFO] [stdout] 27 |             ..Default::default()
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^ the trait `Default` is not implemented for `!`
[INFO] [stdout]    |
[INFO] [stdout] help: the trait `Default` is conditionally implemented for `Export<Data>`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/nbd-0.3.0/src/lib.rs:13:17
[INFO] [stdout]    |
[INFO] [stdout] 13 | #[derive(Debug, Default, Hash, Eq, PartialEq, Ord, PartialOrd)]
[INFO] [stdout]    |                 ^^^^^^^
[INFO] [stdout] 14 | pub struct Export<Data = ()> {
[INFO] [stdout]    |                   ---- unsatisfied requirement introduced here: `!: Default`
[INFO] [stdout]    = note: this error might have been caused by changes to Rust's type-inference algorithm (see issue #148922 <https://github.com/rust-lang/rust/issues/148922> for more information)
[INFO] [stdout]    = help: you might have intended to use the type `()` here instead
[INFO] [stdout]    = note: required for `Export<!>` to implement `Default`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `chdnbd` (bin "chdnbd") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "9e37a7d78521c568b6e9e3f06be3b44d15184f319ef16a4c6dc2de9245346c5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e37a7d78521c568b6e9e3f06be3b44d15184f319ef16a4c6dc2de9245346c5e", kill_on_drop: false }`
[INFO] [stdout] 9e37a7d78521c568b6e9e3f06be3b44d15184f319ef16a4c6dc2de9245346c5e