[INFO] fetching crate n-tree 0.0.1...
[INFO] testing n-tree-0.0.1 against 1.44.0 for beta-1.45-1
[INFO] extracting crate n-tree 0.0.1 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate n-tree 0.0.1 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 n-tree 0.0.1
[INFO] finished tweaking crates.io crate n-tree 0.0.1
[INFO] tweaked toml for crates.io crate n-tree 0.0.1 written to /workspace/builds/worker-1/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] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 468b507b956de8c8130d2796d53ef4c065a691a7d9eb70602de32740499e4e2c
[INFO] running `"docker" "start" "-a" "468b507b956de8c8130d2796d53ef4c065a691a7d9eb70602de32740499e4e2c"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling n-tree v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0658]: non-builtin inner attributes are unstable
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![license = "MIT"]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: see issue #54726 <https://github.com/rust-lang/rust/issues/54726> for more information
[INFO] [stderr] 
[INFO] [stderr] error: cannot find attribute `license` in this scope
[INFO] [stderr]  --> src/lib.rs:1:4
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![license = "MIT"]
[INFO] [stderr]   |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `ref_slice` in module `slice`
[INFO] [stderr]    --> src/lib.rs:108:32
[INFO] [stderr]     |
[INFO] [stderr] 108 |             stack: vec![slice::ref_slice(self).iter()],
[INFO] [stderr]     |                                ^^^^^^^^^ not found in `slice`
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Items` in module `slice`
[INFO] [stderr]    --> src/lib.rs:170:20
[INFO] [stderr]     |
[INFO] [stderr] 170 |     points: slice::Items<'t, P>,
[INFO] [stderr]     |                    ^^^^^ not found in `slice`
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Items` in module `slice`
[INFO] [stderr]    --> src/lib.rs:171:23
[INFO] [stderr]     |
[INFO] [stderr] 171 |     stack: Vec<slice::Items<'t, NTree<R, P>>>
[INFO] [stderr]     |                       ^^^^^ not found in `slice`
[INFO] [stderr] 
[INFO] [stderr] warning: unused label
[INFO] [stderr]    --> src/lib.rs:195:17
[INFO] [stderr]     |
[INFO] [stderr] 195 |                 'children: loop {
[INFO] [stderr]     |                 ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] note: the lint level is defined here
[INFO] [stderr]    --> src/lib.rs:3:9
[INFO] [stderr]     |
[INFO] [stderr] 3   | #![deny(warnings)]
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr]     = note: `#[warn(unused_labels)]` implied by `#[warn(warnings)]`
[INFO] [stderr] 
[INFO] [stderr] error[E0107]: wrong number of type arguments: expected 0, found 1
[INFO] [stderr]    --> src/lib.rs:174:40
[INFO] [stderr]     |
[INFO] [stderr] 174 | impl<'t, 'q, R: Region<P>, P> Iterator<&'t P> for RangeQuery<'t, 'q, R, P> {
[INFO] [stderr]     |                                        ^^^^^ unexpected type argument
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 6 previous errors; 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0107, E0412, E0425, E0658.
[INFO] [stderr] For more information about an error, try `rustc --explain E0107`.
[INFO] [stderr] error: could not compile `n-tree`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "468b507b956de8c8130d2796d53ef4c065a691a7d9eb70602de32740499e4e2c"`
[INFO] running `"docker" "rm" "-f" "468b507b956de8c8130d2796d53ef4c065a691a7d9eb70602de32740499e4e2c"`
[INFO] [stdout] 468b507b956de8c8130d2796d53ef4c065a691a7d9eb70602de32740499e4e2c