[INFO] fetching crate lib_composite 0.7.0...
[INFO] testing lib_composite-0.7.0 against 1.44.0 for beta-1.45-1
[INFO] extracting crate lib_composite 0.7.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate lib_composite 0.7.0 on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate lib_composite 0.7.0
[INFO] finished tweaking crates.io crate lib_composite 0.7.0
[INFO] tweaked toml for crates.io crate lib_composite 0.7.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0d27aa57583bef503a34e939070455b634bf34182dd63011745a1f63a55a7194
[INFO] running `"docker" "start" "-a" "0d27aa57583bef503a34e939070455b634bf34182dd63011745a1f63a55a7194"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling const-cstr-fork v0.2.2
[INFO] [stderr]    Compiling libc-extra v0.0.15
[INFO] [stderr]    Compiling lib_composite v0.7.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(optin_builtin_traits)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]   --> src/kernel_api.rs:17:6
[INFO] [stderr]    |
[INFO] [stderr] 17 | impl !Send for DefKernelAPI{}
[INFO] [stderr]    |      ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]   --> src/kernel_api.rs:18:6
[INFO] [stderr]    |
[INFO] [stderr] 18 | impl !Sync for DefKernelAPI{}
[INFO] [stderr]    |      ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]   --> src/sl.rs:18:6
[INFO] [stderr]    |
[INFO] [stderr] 18 | impl !Send for Sl{}
[INFO] [stderr]    |      ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]   --> src/sl.rs:19:6
[INFO] [stderr]    |
[INFO] [stderr] 19 | impl !Sync for Sl{}
[INFO] [stderr]    |      ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]   --> src/sl_lock.rs:22:21
[INFO] [stderr]    |
[INFO] [stderr] 22 | impl<'a, T: ?Sized> !Send for LockGuard<'a, T> { }
[INFO] [stderr]    |                     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around const expression
[INFO] [stderr]   --> src/sys/sl.rs:22:32
[INFO] [stderr]    |
[INFO] [stderr] 22 |     SL_THD_PROPERTY_SEND     = (1<<1),
[INFO] [stderr]    |                                ^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 6 previous errors; 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0554, E0658.
[INFO] [stderr] For more information about an error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `lib_composite`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "0d27aa57583bef503a34e939070455b634bf34182dd63011745a1f63a55a7194"`
[INFO] running `"docker" "rm" "-f" "0d27aa57583bef503a34e939070455b634bf34182dd63011745a1f63a55a7194"`
[INFO] [stdout] 0d27aa57583bef503a34e939070455b634bf34182dd63011745a1f63a55a7194