[INFO] fetching crate nb-sync 0.2.0...
[INFO] building nb-sync-0.2.0 against master#ff34b919075f35a1787659e9c448a34b06bab8de for issue-85264
[INFO] extracting crate nb-sync 0.2.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate nb-sync 0.2.0 on toolchain ff34b919075f35a1787659e9c448a34b06bab8de
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate nb-sync 0.2.0
[INFO] finished tweaking crates.io crate nb-sync 0.2.0
[INFO] tweaked toml for crates.io crate nb-sync 0.2.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+ff34b919075f35a1787659e9c448a34b06bab8de" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ac321df5c91c406ca99f099681a45a36f42b009212c98c1cb38a8f9db0111e14
[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" "ac321df5c91c406ca99f099681a45a36f42b009212c98c1cb38a8f9db0111e14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ac321df5c91c406ca99f099681a45a36f42b009212c98c1cb38a8f9db0111e14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac321df5c91c406ca99f099681a45a36f42b009212c98c1cb38a8f9db0111e14", kill_on_drop: false }`
[INFO] [stdout] ac321df5c91c406ca99f099681a45a36f42b009212c98c1cb38a8f9db0111e14
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+ff34b919075f35a1787659e9c448a34b06bab8de" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 14a81902d9faf7bbe3e4fd11dccf6ca1b9c79b5c65bb7fd664ef53c332acfc6d
[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" "14a81902d9faf7bbe3e4fd11dccf6ca1b9c79b5c65bb7fd664ef53c332acfc6d", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling nb v0.1.3
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]    Compiling nb-sync v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]    --> src/lib.rs:135:12
[INFO] [stdout]     |
[INFO] [stdout] 135 | #![feature(optin_builtin_traits)]
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]     |
[INFO] [stdout]     = note: renamed to `auto_traits`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/fifo.rs:205:25
[INFO] [stdout]     |
[INFO] [stdout] 205 | impl<'a, 'b: 'a, T: 'b> !Sync for Receiver<'a, 'b, T> {
[INFO] [stdout]     |                         ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/fifo.rs:264:25
[INFO] [stdout]     |
[INFO] [stdout] 264 | impl<'a, 'b: 'a, T: 'b> !Sync for Sender<'a, 'b, T> {
[INFO] [stdout]     |                         ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/fifo.rs:83:30
[INFO] [stdout]    |
[INFO] [stdout] 83 |     pub fn recv(&self, _nr: &NonReentrant) -> nb::Result<T, !> {
[INFO] [stdout]    |                              ^^^^^^^^^^^^ help: use `dyn`: `dyn NonReentrant`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/fifo.rs:117:39
[INFO] [stdout]     |
[INFO] [stdout] 117 |     pub fn send(&self, value: T, nr: &NonReentrant) -> nb::Result<(), !> {
[INFO] [stdout]     |                                       ^^^^^^^^^^^^ help: use `dyn`: `dyn NonReentrant`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/fifo.rs:127:49
[INFO] [stdout]     |
[INFO] [stdout] 127 |     pub fn send_lossless(&self, value: T, _nr: &NonReentrant) -> (nb::Result<(), !>, Option<T>) {
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^ help: use `dyn`: `dyn NonReentrant`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0557, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `nb-sync`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "14a81902d9faf7bbe3e4fd11dccf6ca1b9c79b5c65bb7fd664ef53c332acfc6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14a81902d9faf7bbe3e4fd11dccf6ca1b9c79b5c65bb7fd664ef53c332acfc6d", kill_on_drop: false }`
[INFO] [stdout] 14a81902d9faf7bbe3e4fd11dccf6ca1b9c79b5c65bb7fd664ef53c332acfc6d
