[INFO] fetching crate extra 0.1.0...
[INFO] testing extra-0.1.0 against 1.59.0 for beta-1.60-1
[INFO] extracting crate extra 0.1.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate extra 0.1.0 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate extra 0.1.0
[INFO] finished tweaking crates.io crate extra 0.1.0
[INFO] tweaked toml for crates.io crate extra 0.1.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3019e54a80f096ae3f66eeb9e41219c7fda339198b2401b4f259f17aecc9fd32
[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" "3019e54a80f096ae3f66eeb9e41219c7fda339198b2401b4f259f17aecc9fd32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3019e54a80f096ae3f66eeb9e41219c7fda339198b2401b4f259f17aecc9fd32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3019e54a80f096ae3f66eeb9e41219c7fda339198b2401b4f259f17aecc9fd32", kill_on_drop: false }`
[INFO] [stdout] 3019e54a80f096ae3f66eeb9e41219c7fda339198b2401b4f259f17aecc9fd32
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f10d011d31d39bf2b2d2378f9ecf8ddadd10f2502c2c27c99d833f782cb60fec
[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" "f10d011d31d39bf2b2d2378f9ecf8ddadd10f2502c2c27c99d833f782cb60fec", kill_on_drop: false }`
[INFO] [stderr]    Compiling extra v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(const_fn)]
[INFO] [stdout]   |            ^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: split into finer-grained feature gates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `collections`
[INFO] [stdout]  --> src/slice.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | extern crate collections;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0405]: cannot find trait `RangeArgument` in this scope
[INFO] [stdout]   --> src/slice.rs:37:41
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn get_slice<T: AsOption<usize>, U: RangeArgument<T>>(&self, a: U) -> &Self;
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0405]: cannot find trait `RangeArgument` in this scope
[INFO] [stdout]   --> src/slice.rs:39:45
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn get_slice_mut<T: AsOption<usize>, U: RangeArgument<T>>(&mut self, a: U) -> &mut Self;
[INFO] [stdout]    |                                             ^^^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0405]: cannot find trait `RangeArgument` in this scope
[INFO] [stdout]   --> src/slice.rs:42:33
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn bound<T: AsOption<usize>, U: RangeArgument<T>>(len: usize, a: U) -> Range<usize> {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0405]: cannot find trait `RangeArgument` in this scope
[INFO] [stdout]   --> src/slice.rs:54:41
[INFO] [stdout]    |
[INFO] [stdout] 54 |     fn get_slice<T: AsOption<usize>, U: RangeArgument<T>>(&self, a: U) -> &Self {
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0405]: cannot find trait `RangeArgument` in this scope
[INFO] [stdout]   --> src/slice.rs:58:45
[INFO] [stdout]    |
[INFO] [stdout] 58 |     fn get_slice_mut<T: AsOption<usize>, U: RangeArgument<T>>(&mut self, a: U) -> &mut Self {
[INFO] [stdout]    |                                             ^^^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0405]: cannot find trait `RangeArgument` in this scope
[INFO] [stdout]   --> src/slice.rs:65:41
[INFO] [stdout]    |
[INFO] [stdout] 65 |     fn get_slice<U: AsOption<usize>, V: RangeArgument<U>>(&self, a: V) -> &Self {
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0405]: cannot find trait `RangeArgument` in this scope
[INFO] [stdout]   --> src/slice.rs:69:45
[INFO] [stdout]    |
[INFO] [stdout] 69 |     fn get_slice_mut<U: AsOption<usize>, V: RangeArgument<U>>(&mut self, a: V) -> &mut Self {
[INFO] [stdout]    |                                             ^^^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(collections)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(collections_range)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(const_fn)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(core_intrinsics)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(stmt_expr_attributes)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![feature(unicode)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 15 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0405, E0463, E0554, E0557.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0405`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `extra` due to 16 previous errors
[INFO] running `Command { std: "docker" "inspect" "f10d011d31d39bf2b2d2378f9ecf8ddadd10f2502c2c27c99d833f782cb60fec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f10d011d31d39bf2b2d2378f9ecf8ddadd10f2502c2c27c99d833f782cb60fec", kill_on_drop: false }`
[INFO] [stdout] f10d011d31d39bf2b2d2378f9ecf8ddadd10f2502c2c27c99d833f782cb60fec