[INFO] updating cached repository chivequiachon/rusty_os
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/chivequiachon/rusty_os
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/chivequiachon/rusty_os" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/chivequiachon/rusty_os"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/chivequiachon/rusty_os'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/chivequiachon/rusty_os" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/chivequiachon/rusty_os"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/chivequiachon/rusty_os'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b546f2155d5f4e0292ca90b0f687d64b0092030d
[INFO] sha for GitHub repo chivequiachon/rusty_os: b546f2155d5f4e0292ca90b0f687d64b0092030d
[INFO] validating manifest of chivequiachon/rusty_os on toolchain master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of chivequiachon/rusty_os on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing chivequiachon/rusty_os
[INFO] finished frobbing chivequiachon/rusty_os
[INFO] frobbed toml for chivequiachon/rusty_os written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/chivequiachon/rusty_os/Cargo.toml
[INFO] started frobbing chivequiachon/rusty_os
[INFO] finished frobbing chivequiachon/rusty_os
[INFO] frobbed toml for chivequiachon/rusty_os written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/chivequiachon/rusty_os/Cargo.toml
[INFO] crate chivequiachon/rusty_os already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking chivequiachon/rusty_os against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-7/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/chivequiachon/rusty_os:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 79cdcbfbce3610b0b31843027c68bb635863c8d68b36eb2854c2b7423c0bb4a3
[INFO] running `"docker" "start" "-a" "79cdcbfbce3610b0b31843027c68bb635863c8d68b36eb2854c2b7423c0bb4a3"`
[INFO] [stderr]     Checking spin v0.4.5
[INFO] [stderr]     Checking rust_os v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: the item `Write` is imported redundantly
[INFO] [stderr]   --> src/vga_buffer.rs:76:6
[INFO] [stderr]    |
[INFO] [stderr] 5  | use core::fmt::Write;
[INFO] [stderr]    |     ---------------- the item `Write` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 76 |     use core::fmt::Write;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0522]: definition of an unknown language item: `panic_fmt`
[INFO] [stderr]   --> src/lib.rs:69:1
[INFO] [stderr]    |
[INFO] [stderr] 69 | #[lang = "panic_fmt"] #[no_mangle] 
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^ definition of unknown language item `panic_fmt`
[INFO] [stderr] 
[INFO] [stderr] error: `#[panic_handler]` function required, but not found
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals': use `NonNull` instead and consider `PhantomData<T>` (if you also use `#[may_dangle]`), `Send`, and/or `Sync`
[INFO] [stderr]  --> src/vga_buffer.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use core::ptr::Unique;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = help: add `#![feature(ptr_internals)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals': use `NonNull` instead and consider `PhantomData<T>` (if you also use `#[may_dangle]`), `Send`, and/or `Sync`
[INFO] [stderr]   --> src/vga_buffer.rs:55:10
[INFO] [stderr]    |
[INFO] [stderr] 55 |     buffer: Unique<Buffer>
[INFO] [stderr]    |             ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: add `#![feature(ptr_internals)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals': use `NonNull` instead and consider `PhantomData<T>` (if you also use `#[may_dangle]`), `Send`, and/or `Sync`
[INFO] [stderr]   --> src/vga_buffer.rs:72:19
[INFO] [stderr]    |
[INFO] [stderr] 72 |     buffer: unsafe { Unique::new_unchecked(0xb8000 as *mut _)}
[INFO] [stderr]    |                      ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: add `#![feature(ptr_internals)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals': use `NonNull` instead and consider `PhantomData<T>` (if you also use `#[may_dangle]`), `Send`, and/or `Sync`
[INFO] [stderr]    --> src/vga_buffer.rs:157:20
[INFO] [stderr]     |
[INFO] [stderr] 157 |         buffer: unsafe { Unique::new_unchecked(0xb8000 as *mut _) }
[INFO] [stderr]     |                          ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: add `#![feature(ptr_internals)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals'
[INFO] [stderr]   --> src/vga_buffer.rs:72:19
[INFO] [stderr]    |
[INFO] [stderr] 72 |     buffer: unsafe { Unique::new_unchecked(0xb8000 as *mut _)}
[INFO] [stderr]    |                      ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: add `#![feature(ptr_internals)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals'
[INFO] [stderr]    --> src/vga_buffer.rs:104:23
[INFO] [stderr]     |
[INFO] [stderr] 104 |         unsafe{ self.buffer.as_mut() }
[INFO] [stderr]     |                             ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: add `#![feature(ptr_internals)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals'
[INFO] [stderr]    --> src/vga_buffer.rs:157:20
[INFO] [stderr]     |
[INFO] [stderr] 157 |         buffer: unsafe { Unique::new_unchecked(0xb8000 as *mut _) }
[INFO] [stderr]     |                          ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: add `#![feature(ptr_internals)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 9 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0522, E0658.
[INFO] [stderr] For more information about an error, try `rustc --explain E0522`.
[INFO] [stderr] error: Could not compile `rust_os`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: the item `Write` is imported redundantly
[INFO] [stderr]   --> src/vga_buffer.rs:76:6
[INFO] [stderr]    |
[INFO] [stderr] 5  | use core::fmt::Write;
[INFO] [stderr]    |     ---------------- the item `Write` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 76 |     use core::fmt::Write;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0152]: duplicate lang item found: `eh_personality`.
[INFO] [stderr]   --> src/lib.rs:68:28
[INFO] [stderr]    |
[INFO] [stderr] 68 | #[lang = "eh_personality"] extern fn eh_personality() {}
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: first defined in crate `panic_unwind`.
[INFO] [stderr] 
[INFO] [stderr] error[E0522]: definition of an unknown language item: `panic_fmt`
[INFO] [stderr]   --> src/lib.rs:69:1
[INFO] [stderr]    |
[INFO] [stderr] 69 | #[lang = "panic_fmt"] #[no_mangle] 
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^ definition of unknown language item `panic_fmt`
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals': use `NonNull` instead and consider `PhantomData<T>` (if you also use `#[may_dangle]`), `Send`, and/or `Sync`
[INFO] [stderr]  --> src/vga_buffer.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use core::ptr::Unique;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = help: add `#![feature(ptr_internals)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals': use `NonNull` instead and consider `PhantomData<T>` (if you also use `#[may_dangle]`), `Send`, and/or `Sync`
[INFO] [stderr]   --> src/vga_buffer.rs:55:10
[INFO] [stderr]    |
[INFO] [stderr] 55 |     buffer: Unique<Buffer>
[INFO] [stderr]    |             ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: add `#![feature(ptr_internals)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals': use `NonNull` instead and consider `PhantomData<T>` (if you also use `#[may_dangle]`), `Send`, and/or `Sync`
[INFO] [stderr]   --> src/vga_buffer.rs:72:19
[INFO] [stderr]    |
[INFO] [stderr] 72 |     buffer: unsafe { Unique::new_unchecked(0xb8000 as *mut _)}
[INFO] [stderr]    |                      ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: add `#![feature(ptr_internals)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals': use `NonNull` instead and consider `PhantomData<T>` (if you also use `#[may_dangle]`), `Send`, and/or `Sync`
[INFO] [stderr]    --> src/vga_buffer.rs:157:20
[INFO] [stderr]     |
[INFO] [stderr] 157 |         buffer: unsafe { Unique::new_unchecked(0xb8000 as *mut _) }
[INFO] [stderr]     |                          ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: add `#![feature(ptr_internals)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals'
[INFO] [stderr]   --> src/vga_buffer.rs:72:19
[INFO] [stderr]    |
[INFO] [stderr] 72 |     buffer: unsafe { Unique::new_unchecked(0xb8000 as *mut _)}
[INFO] [stderr]    |                      ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: add `#![feature(ptr_internals)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals'
[INFO] [stderr]    --> src/vga_buffer.rs:104:23
[INFO] [stderr]     |
[INFO] [stderr] 104 |         unsafe{ self.buffer.as_mut() }
[INFO] [stderr]     |                             ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: add `#![feature(ptr_internals)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals'
[INFO] [stderr]    --> src/vga_buffer.rs:157:20
[INFO] [stderr]     |
[INFO] [stderr] 157 |         buffer: unsafe { Unique::new_unchecked(0xb8000 as *mut _) }
[INFO] [stderr]     |                          ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: add `#![feature(ptr_internals)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 9 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0152, E0522, E0658.
[INFO] [stderr] For more information about an error, try `rustc --explain E0152`.
[INFO] [stderr] error: Could not compile `rust_os`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "79cdcbfbce3610b0b31843027c68bb635863c8d68b36eb2854c2b7423c0bb4a3"`
[INFO] running `"docker" "rm" "-f" "79cdcbfbce3610b0b31843027c68bb635863c8d68b36eb2854c2b7423c0bb4a3"`
[INFO] [stdout] 79cdcbfbce3610b0b31843027c68bb635863c8d68b36eb2854c2b7423c0bb4a3