[INFO] cloning repository https://github.com/mgattozzi/oxidizing-the-technical-interview
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mgattozzi/oxidizing-the-technical-interview" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmgattozzi%2Foxidizing-the-technical-interview", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmgattozzi%2Foxidizing-the-technical-interview'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b536ec33119b316c2527476541def377c63b14b4
[INFO] checking mgattozzi/oxidizing-the-technical-interview against beta-2021-10-15 for beta-1.56-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmgattozzi%2Foxidizing-the-technical-interview" "/workspace/builds/worker-63/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-63/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mgattozzi/oxidizing-the-technical-interview on toolchain beta-2021-10-15
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-63/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/mgattozzi/oxidizing-the-technical-interview
[INFO] finished tweaking git repo https://github.com/mgattozzi/oxidizing-the-technical-interview
[INFO] tweaked toml for git repo https://github.com/mgattozzi/oxidizing-the-technical-interview written to /workspace/builds/worker-63/source/Cargo.toml
[INFO] crate git repo https://github.com/mgattozzi/oxidizing-the-technical-interview already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] afd8eb03b9f735462a68a64132a5bc77fc7ab18ca87502f18e64e3a2823f23b9
[INFO] running `Command { std: "docker" "start" "-a" "afd8eb03b9f735462a68a64132a5bc77fc7ab18ca87502f18e64e3a2823f23b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "afd8eb03b9f735462a68a64132a5bc77fc7ab18ca87502f18e64e3a2823f23b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "afd8eb03b9f735462a68a64132a5bc77fc7ab18ca87502f18e64e3a2823f23b9", kill_on_drop: false }`
[INFO] [stdout] afd8eb03b9f735462a68a64132a5bc77fc7ab18ca87502f18e64e3a2823f23b9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-10-15" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dcd7c76c04d600b5186d7d50978d16d924fbaedd1e1f03eee811a80d7f7bc7e3
[INFO] running `Command { std: "docker" "start" "-a" "dcd7c76c04d600b5186d7d50978d16d924fbaedd1e1f03eee811a80d7f7bc7e3", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking oxidizing-the-interview v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![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[E0557]: feature has been removed
[INFO] [stdout]  --> src/main.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![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[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(const_fn)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(const_fn_union)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `const_fn_union` has been stable since 1.56.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(const_panic)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(const_if_match)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `const_if_match` has been stable since 1.46.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(const_raw_ptr_deref)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(lang_items)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(no_core)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![feature(optin_builtin_traits)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(allow_internal_unstable)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/main.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(intrinsics)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/main.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | #![feature(untagged_unions)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: auto traits are experimental and possibly buggy
[INFO] [stdout]   --> src/main.rs:49:1
[INFO] [stdout]    |
[INFO] [stdout] 49 | auto trait Freeze {}
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #13231 <https://github.com/rust-lang/rust/issues/13231> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: found duplicate lang item `sized`
[INFO] [stdout]   --> src/main.rs:47:1
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub trait Sized {}
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the lang item is first defined in crate `core` (which `std` depends on)
[INFO] [stdout]    = note: first definition in `core` loaded from /opt/rustwide/rustup-home/toolchains/beta-2021-10-15-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-8ef7dd43fc671f88.rlib
[INFO] [stdout]    = note: second definition in the local crate (`oxidizing_the_interview`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: found duplicate lang item `freeze`
[INFO] [stdout]   --> src/main.rs:49:1
[INFO] [stdout]    |
[INFO] [stdout] 49 | auto trait Freeze {}
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the lang item is first defined in crate `core` (which `std` depends on)
[INFO] [stdout]    = note: first definition in `core` loaded from /opt/rustwide/rustup-home/toolchains/beta-2021-10-15-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-8ef7dd43fc671f88.rlib
[INFO] [stdout]    = note: second definition in the local crate (`oxidizing_the_interview`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: found duplicate lang item `receiver`
[INFO] [stdout]   --> src/main.rs:54:1
[INFO] [stdout]    |
[INFO] [stdout] 54 | trait Receiver {}
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the lang item is first defined in crate `core` (which `std` depends on)
[INFO] [stdout]    = note: first definition in `core` loaded from /opt/rustwide/rustup-home/toolchains/beta-2021-10-15-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-8ef7dd43fc671f88.rlib
[INFO] [stdout]    = note: second definition in the local crate (`oxidizing_the_interview`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: found duplicate lang item `index`
[INFO] [stdout]   --> src/main.rs:56:1
[INFO] [stdout]    |
[INFO] [stdout] 56 | / trait Index<Idx: ?Sized> {
[INFO] [stdout] 57 | |     type Output: ?Sized;
[INFO] [stdout] 58 | |     fn index(&self, index: Idx) -> &Self::Output;
[INFO] [stdout] 59 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the lang item is first defined in crate `core` (which `std` depends on)
[INFO] [stdout]    = note: first definition in `core` loaded from /opt/rustwide/rustup-home/toolchains/beta-2021-10-15-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-8ef7dd43fc671f88.rlib
[INFO] [stdout]    = note: second definition in the local crate (`oxidizing_the_interview`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: found duplicate lang item `copy`
[INFO] [stdout]   --> src/main.rs:79:1
[INFO] [stdout]    |
[INFO] [stdout] 79 | trait Copy: Clone {}
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the lang item is first defined in crate `core` (which `std` depends on)
[INFO] [stdout]    = note: first definition in `core` loaded from /opt/rustwide/rustup-home/toolchains/beta-2021-10-15-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-8ef7dd43fc671f88.rlib
[INFO] [stdout]    = note: second definition in the local crate (`oxidizing_the_interview`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: found duplicate lang item `eq`
[INFO] [stdout]   --> src/main.rs:87:1
[INFO] [stdout]    |
[INFO] [stdout] 87 | / trait PartialEq<Rhs: ?Sized = Self> {
[INFO] [stdout] 88 | |     fn eq(&self, other: &Rhs) -> bool;
[INFO] [stdout] 89 | |     fn ne(&self, other: &Rhs) -> bool {
[INFO] [stdout] 90 | |         !self.eq(other)
[INFO] [stdout] 91 | |     }
[INFO] [stdout] 92 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the lang item is first defined in crate `core` (which `std` depends on)
[INFO] [stdout]    = note: first definition in `core` loaded from /opt/rustwide/rustup-home/toolchains/beta-2021-10-15-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-8ef7dd43fc671f88.rlib
[INFO] [stdout]    = note: second definition in the local crate (`oxidizing_the_interview`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: found duplicate lang item `partial_ord`
[INFO] [stdout]    --> src/main.rs:94:1
[INFO] [stdout]     |
[INFO] [stdout] 94  | / trait PartialOrd<Rhs: ?Sized = Self>: PartialEq<Rhs> {
[INFO] [stdout] 95  | |     fn partial_cmp(&self, other: &Rhs) -> Option<Ordering>;
[INFO] [stdout] 96  | |     fn lt(&self, other: &Rhs) -> bool {
[INFO] [stdout] 97  | |         matches!(self.partial_cmp(other), Some(Less))
[INFO] [stdout] ...   |
[INFO] [stdout] 107 | |     }
[INFO] [stdout] 108 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the lang item is first defined in crate `core` (which `std` depends on)
[INFO] [stdout]     = note: first definition in `core` loaded from /opt/rustwide/rustup-home/toolchains/beta-2021-10-15-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-8ef7dd43fc671f88.rlib
[INFO] [stdout]     = note: second definition in the local crate (`oxidizing_the_interview`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: found duplicate lang item `not`
[INFO] [stdout]    --> src/main.rs:110:1
[INFO] [stdout]     |
[INFO] [stdout] 110 | / trait Not {
[INFO] [stdout] 111 | |     type Output;
[INFO] [stdout] 112 | |
[INFO] [stdout] 113 | |     fn not(self) -> Self::Output;
[INFO] [stdout] 114 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the lang item is first defined in crate `core` (which `std` depends on)
[INFO] [stdout]     = note: first definition in `core` loaded from /opt/rustwide/rustup-home/toolchains/beta-2021-10-15-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-8ef7dd43fc671f88.rlib
[INFO] [stdout]     = note: second definition in the local crate (`oxidizing_the_interview`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: found duplicate lang item `neg`
[INFO] [stdout]    --> src/main.rs:116:1
[INFO] [stdout]     |
[INFO] [stdout] 116 | / trait Neg {
[INFO] [stdout] 117 | |     type Output;
[INFO] [stdout] 118 | |     fn neg(self) -> Self::Output;
[INFO] [stdout] 119 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the lang item is first defined in crate `core` (which `std` depends on)
[INFO] [stdout]     = note: first definition in `core` loaded from /opt/rustwide/rustup-home/toolchains/beta-2021-10-15-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-8ef7dd43fc671f88.rlib
[INFO] [stdout]     = note: second definition in the local crate (`oxidizing_the_interview`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: found duplicate lang item `sub`
[INFO] [stdout]    --> src/main.rs:121:1
[INFO] [stdout]     |
[INFO] [stdout] 121 | / trait Sub<Rhs = Self> {
[INFO] [stdout] 122 | |     type Output;
[INFO] [stdout] 123 | |     fn sub(self, rhs: Rhs) -> Self::Output;
[INFO] [stdout] 124 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the lang item is first defined in crate `core` (which `std` depends on)
[INFO] [stdout]     = note: first definition in `core` loaded from /opt/rustwide/rustup-home/toolchains/beta-2021-10-15-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-8ef7dd43fc671f88.rlib
[INFO] [stdout]     = note: second definition in the local crate (`oxidizing_the_interview`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: found duplicate lang item `slice`
[INFO] [stdout]    --> src/main.rs:129:1
[INFO] [stdout]     |
[INFO] [stdout] 129 | / impl<T> [T] {
[INFO] [stdout] 130 | |     #[allow(unused_attributes)]
[INFO] [stdout] 131 | |     #[allow_internal_unstable(const_fn_union)]
[INFO] [stdout] 132 | |     const fn len(&self) -> usize {
[INFO] [stdout] ...   |
[INFO] [stdout] 142 | |     }
[INFO] [stdout] 143 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the lang item is first defined in crate `core` (which `std` depends on)
[INFO] [stdout]     = note: first definition in `core` loaded from /opt/rustwide/rustup-home/toolchains/beta-2021-10-15-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-8ef7dd43fc671f88.rlib
[INFO] [stdout]     = note: second definition in the local crate (`oxidizing_the_interview`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: found duplicate lang item `const_ptr`
[INFO] [stdout]    --> src/main.rs:146:1
[INFO] [stdout]     |
[INFO] [stdout] 146 | / impl<T: ?Sized> *const T {
[INFO] [stdout] 147 | |     unsafe fn add(self, count: usize) -> Self
[INFO] [stdout] 148 | |     where
[INFO] [stdout] 149 | |         T: Sized,
[INFO] [stdout] ...   |
[INFO] [stdout] 159 | |     }
[INFO] [stdout] 160 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the lang item is first defined in crate `core` (which `std` depends on)
[INFO] [stdout]     = note: first definition in `core` loaded from /opt/rustwide/rustup-home/toolchains/beta-2021-10-15-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-8ef7dd43fc671f88.rlib
[INFO] [stdout]     = note: second definition in the local crate (`oxidizing_the_interview`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: found duplicate lang item `mut_ptr`
[INFO] [stdout]    --> src/main.rs:162:1
[INFO] [stdout]     |
[INFO] [stdout] 162 | / impl<T: ?Sized> *mut T {
[INFO] [stdout] 163 | |     unsafe fn add(self, count: usize) -> *mut T
[INFO] [stdout] 164 | |     where
[INFO] [stdout] 165 | |         T: Sized,
[INFO] [stdout] ...   |
[INFO] [stdout] 174 | |     }
[INFO] [stdout] 175 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the lang item is first defined in crate `core` (which `std` depends on)
[INFO] [stdout]     = note: first definition in `core` loaded from /opt/rustwide/rustup-home/toolchains/beta-2021-10-15-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-8ef7dd43fc671f88.rlib
[INFO] [stdout]     = note: second definition in the local crate (`oxidizing_the_interview`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: found duplicate lang item `start`
[INFO] [stdout]    --> src/main.rs:264:1
[INFO] [stdout]     |
[INFO] [stdout] 264 | fn start<T: Termination + 'static>(main: fn() -> T, _: isize, _: *const *const u8) -> isize {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the lang item is first defined in crate `std` (which `test` depends on)
[INFO] [stdout]     = note: first definition in `std` loaded from /opt/rustwide/rustup-home/toolchains/beta-2021-10-15-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-9a950938f3668a37.rlib
[INFO] [stdout]     = note: second definition in the local crate (`oxidizing_the_interview`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: attribute should be applied to a macro
[INFO] [stdout]    --> src/main.rs:131:5
[INFO] [stdout]     |
[INFO] [stdout] 131 |       #[allow_internal_unstable(const_fn_union)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 132 | /     const fn len(&self) -> usize {
[INFO] [stdout] 133 | |         unsafe { Repr { rust: self }.raw.len }
[INFO] [stdout] 134 | |     }
[INFO] [stdout]     | |_____- not a macro
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![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[E0557]: feature has been removed
[INFO] [stdout]  --> src/main.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![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[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(const_fn)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(const_fn_union)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `const_fn_union` has been stable since 1.56.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(const_panic)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(const_if_match)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `const_if_match` has been stable since 1.46.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 29 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0152, E0554, E0557, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0152`.
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(const_raw_ptr_deref)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(lang_items)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(no_core)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![feature(optin_builtin_traits)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(allow_internal_unstable)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/main.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(intrinsics)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/main.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | #![feature(untagged_unions)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: auto traits are experimental and possibly buggy
[INFO] [stdout]   --> src/main.rs:49:1
[INFO] [stdout]    |
[INFO] [stdout] 49 | auto trait Freeze {}
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #13231 <https://github.com/rust-lang/rust/issues/13231> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: attribute should be applied to a macro
[INFO] [stdout]    --> src/main.rs:131:5
[INFO] [stdout]     |
[INFO] [stdout] 131 |       #[allow_internal_unstable(const_fn_union)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 132 | /     const fn len(&self) -> usize {
[INFO] [stdout] 133 | |         unsafe { Repr { rust: self }.raw.len }
[INFO] [stdout] 134 | |     }
[INFO] [stdout]     | |_____- not a macro
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `oxidizing-the-interview` due to 30 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 15 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0557, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "dcd7c76c04d600b5186d7d50978d16d924fbaedd1e1f03eee811a80d7f7bc7e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dcd7c76c04d600b5186d7d50978d16d924fbaedd1e1f03eee811a80d7f7bc7e3", kill_on_drop: false }`
[INFO] [stdout] dcd7c76c04d600b5186d7d50978d16d924fbaedd1e1f03eee811a80d7f7bc7e3
