[INFO] fetching crate futures-udp 0.1.0...
[INFO] checking futures-udp-0.1.0 against 1.95.0 for pr-155915
[INFO] extracting crate futures-udp 0.1.0 into /workspace/builds/worker-2-tc1/source
[INFO] removed /workspace/builds/worker-2-tc1/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-2-tc1/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate futures-udp 0.1.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate futures-udp 0.1.0
[INFO] tweaked toml for crates.io crate futures-udp 0.1.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate futures-udp 0.1.0 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate futures-udp 0.1.0 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded async-datagram v3.0.0
[INFO] [stderr]   Downloaded futures-net-macro v1.0.0
[INFO] [stderr]   Downloaded async-ready v3.0.0
[INFO] [stderr]   Downloaded parking_lot_core v0.7.3
[INFO] [stderr]   Downloaded futures-net v0.6.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8fad415e1ed5f7f1c707aa38df4f66420c54f406bd457e48852b5f00e147dae4
[INFO] running `Command { std: "docker" "start" "-a" "8fad415e1ed5f7f1c707aa38df4f66420c54f406bd457e48852b5f00e147dae4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8fad415e1ed5f7f1c707aa38df4f66420c54f406bd457e48852b5f00e147dae4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fad415e1ed5f7f1c707aa38df4f66420c54f406bd457e48852b5f00e147dae4", kill_on_drop: false }`
[INFO] [stdout] 8fad415e1ed5f7f1c707aa38df4f66420c54f406bd457e48852b5f00e147dae4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9f0dcc22e26cb7aaf6843765dc26f8fffb9696b1eb00b8dd17c2fa8ca4671ad0
[INFO] running `Command { std: "docker" "start" "-a" "9f0dcc22e26cb7aaf6843765dc26f8fffb9696b1eb00b8dd17c2fa8ca4671ad0", kill_on_drop: false }`
[INFO] [stderr]     Checking async-datagram v3.0.0
[INFO] [stderr]     Checking async-ready v3.0.0
[INFO] [stderr]     Checking cache-padded v1.3.0
[INFO] [stderr]    Compiling futures-udp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking parking_lot_core v0.7.3
[INFO] [stderr]    Compiling futures-net-macro v1.0.0
[INFO] [stderr]     Checking futures-util v0.3.32
[INFO] [stderr]     Checking parking_lot v0.10.2
[INFO] [stderr]     Checking futures-executor v0.3.32
[INFO] [stderr]     Checking futures-net v0.6.0
[INFO] [stderr]     Checking futures v0.3.32
[INFO] [stdout] error[E0658]: the `!` type is experimental
[INFO] [stdout]    --> src/lib.rs:204:83
[INFO] [stdout]     |
[INFO] [stdout] 204 |     fn clear_ready(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<!>>;
[INFO] [stdout]     |                                                                                   ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #35121 <https://github.com/rust-lang/rust/issues/35121> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the `!` type is experimental
[INFO] [stdout]    --> src/lib.rs:221:27
[INFO] [stdout]     |
[INFO] [stdout] 221 |         error: io::Result<!>,
[INFO] [stdout]     |                           ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #35121 <https://github.com/rust-lang/rust/issues/35121> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the `!` type is experimental
[INFO] [stdout]    --> src/lib.rs:223:26
[INFO] [stdout]     |
[INFO] [stdout] 223 |     ) -> Poll<io::Result<!>> {
[INFO] [stdout]     |                          ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #35121 <https://github.com/rust-lang/rust/issues/35121> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the `!` type is experimental
[INFO] [stdout]    --> src/lib.rs:253:83
[INFO] [stdout]     |
[INFO] [stdout] 253 |     fn clear_ready(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<!>> {
[INFO] [stdout]     |                                                                                   ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #35121 <https://github.com/rust-lang/rust/issues/35121> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the `!` type is experimental
[INFO] [stdout]    --> src/lib.rs:353:83
[INFO] [stdout]     |
[INFO] [stdout] 353 |     fn clear_ready(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<!>> {
[INFO] [stdout]     |                                                                                   ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #35121 <https://github.com/rust-lang/rust/issues/35121> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature `bool_to_result`
[INFO] [stdout]    --> src/lib.rs:145:14
[INFO] [stdout]     |
[INFO] [stdout] 145 |             .ok_or(io::Error::from(io::ErrorKind::Unsupported))?;
[INFO] [stdout]     |              ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #142748 <https://github.com/rust-lang/rust/issues/142748> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature `bool_to_result`
[INFO] [stdout]    --> src/lib.rs:155:14
[INFO] [stdout]     |
[INFO] [stdout] 155 |             .ok_or(io::Error::from(io::ErrorKind::Unsupported))?;
[INFO] [stdout]     |              ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #142748 <https://github.com/rust-lang/rust/issues/142748> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the `!` type is experimental
[INFO] [stdout]    --> src/lib.rs:204:83
[INFO] [stdout]     |
[INFO] [stdout] 204 |     fn clear_ready(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<!>>;
[INFO] [stdout]     |                                                                                   ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #35121 <https://github.com/rust-lang/rust/issues/35121> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the `!` type is experimental
[INFO] [stdout]    --> src/lib.rs:221:27
[INFO] [stdout]     |
[INFO] [stdout] 221 |         error: io::Result<!>,
[INFO] [stdout]     |                           ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #35121 <https://github.com/rust-lang/rust/issues/35121> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the `!` type is experimental
[INFO] [stdout]    --> src/lib.rs:223:26
[INFO] [stdout]     |
[INFO] [stdout] 223 |     ) -> Poll<io::Result<!>> {
[INFO] [stdout]     |                          ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #35121 <https://github.com/rust-lang/rust/issues/35121> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the `!` type is experimental
[INFO] [stdout]    --> src/lib.rs:253:83
[INFO] [stdout]     |
[INFO] [stdout] 253 |     fn clear_ready(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<!>> {
[INFO] [stdout]     |                                                                                   ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #35121 <https://github.com/rust-lang/rust/issues/35121> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: the `!` type is experimental
[INFO] [stdout]    --> src/lib.rs:353:83
[INFO] [stdout]     |
[INFO] [stdout] 353 |     fn clear_ready(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<!>> {
[INFO] [stdout]     |                                                                                   ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #35121 <https://github.com/rust-lang/rust/issues/35121> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature `bool_to_result`
[INFO] [stdout]    --> src/lib.rs:145:14
[INFO] [stdout]     |
[INFO] [stdout] 145 |             .ok_or(io::Error::from(io::ErrorKind::Unsupported))?;
[INFO] [stdout]     |              ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #142748 <https://github.com/rust-lang/rust/issues/142748> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature `bool_to_result`
[INFO] [stdout]    --> src/lib.rs:155:14
[INFO] [stdout]     |
[INFO] [stdout] 155 |             .ok_or(io::Error::from(io::ErrorKind::Unsupported))?;
[INFO] [stdout]     |              ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #142748 <https://github.com/rust-lang/rust/issues/142748> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `futures-udp` (lib test) due to 7 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `futures-udp` (lib) due to 7 previous errors
[INFO] running `Command { std: "docker" "inspect" "9f0dcc22e26cb7aaf6843765dc26f8fffb9696b1eb00b8dd17c2fa8ca4671ad0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f0dcc22e26cb7aaf6843765dc26f8fffb9696b1eb00b8dd17c2fa8ca4671ad0", kill_on_drop: false }`
[INFO] [stdout] 9f0dcc22e26cb7aaf6843765dc26f8fffb9696b1eb00b8dd17c2fa8ca4671ad0
