[INFO] updating cached repository mopp/Axel
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mopp/Axel
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mopp/Axel" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/mopp/Axel"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/mopp/Axel'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mopp/Axel" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/mopp/Axel"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/mopp/Axel'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 737d5a1dd1a3764ee29968a65abaf4f20da89174
[INFO] sha for GitHub repo mopp/Axel: 737d5a1dd1a3764ee29968a65abaf4f20da89174
[INFO] validating manifest of mopp/Axel on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mopp/Axel on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mopp/Axel
[INFO] finished frobbing mopp/Axel
[INFO] frobbed toml for mopp/Axel written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/mopp/Axel/Cargo.toml
[INFO] started frobbing mopp/Axel
[INFO] finished frobbing mopp/Axel
[INFO] frobbed toml for mopp/Axel written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/mopp/Axel/Cargo.toml
[INFO] crate mopp/Axel already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking mopp/Axel against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-1/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/mopp/Axel:/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" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 89b7791cb9a8bb217d556cbf338259aeac67fadea09d94068ceff832978d2480
[INFO] running `"docker" "start" "-a" "89b7791cb9a8bb217d556cbf338259aeac67fadea09d94068ceff832978d2480"`
[INFO] [stderr]     Checking bitflags v1.0.3
[INFO] [stderr]     Checking rlibc v1.0.0
[INFO] [stderr]     Checking lazy_static v1.0.0
[INFO] [stderr]     Checking multiboot2 v0.5.0 (https://github.com/phil-opp/multiboot2-elf64.git#784cfb52)
[INFO] [stderr]     Checking axel v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: the item `rlibc` is imported redundantly
[INFO] [stderr]   --> src/memory/mod.rs:22:13
[INFO] [stderr]    |
[INFO] [stderr] 22 |         use rlibc;
[INFO] [stderr]    |             ^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/kernel.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | extern crate rlibc;
[INFO] [stderr]    | ------------------- the item `rlibc` is already imported here
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `std::heap`
[INFO] [stderr]    --> src/list.rs:245:14
[INFO] [stderr]     |
[INFO] [stderr] 245 |     use std::heap::{Alloc, Layout, System};
[INFO] [stderr]     |              ^^^^ could not find `heap` in `std`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `std::heap`
[INFO] [stderr]    --> src/memory/buddy_system/allocator.rs:191:14
[INFO] [stderr]     |
[INFO] [stderr] 191 |     use std::heap::{Alloc, Layout, System};
[INFO] [stderr]     |              ^^^^ could not find `heap` in `std`
[INFO] [stderr] 
[INFO] [stderr] warning: the item `rlibc` is imported redundantly
[INFO] [stderr]   --> src/memory/mod.rs:22:13
[INFO] [stderr]    |
[INFO] [stderr] 22 |         use rlibc;
[INFO] [stderr]    |             ^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/kernel.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | extern crate rlibc;
[INFO] [stderr]    | ------------------- the item `rlibc` is already imported here
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `core::panic::PanicInfo`
[INFO] [stderr]   --> src/kernel.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 | use core::panic::PanicInfo;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `memory::region::RegionManager`
[INFO] [stderr]   --> src/kernel.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 | use memory::region::RegionManager;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/memory/buddy_system/allocator.rs:151:25
[INFO] [stderr]     |
[INFO] [stderr] 151 |             if let Some(mut buddy_obj) = self.buddy(obj, i) {
[INFO] [stderr]     |                         ----^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `head_mut`
[INFO] [stderr]   --> src/list.rs:81:5
[INFO] [stderr]    |
[INFO] [stderr] 81 |     pub fn head_mut(&mut self) -> Option<&mut T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `tail`
[INFO] [stderr]   --> src/list.rs:85:5
[INFO] [stderr]    |
[INFO] [stderr] 85 |     pub fn tail(&self) -> Option<&T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `tail_mut`
[INFO] [stderr]   --> src/list.rs:89:5
[INFO] [stderr]    |
[INFO] [stderr] 89 |     pub fn tail_mut(&mut self) -> Option<&mut T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `count`
[INFO] [stderr]   --> src/list.rs:93:5
[INFO] [stderr]    |
[INFO] [stderr] 93 |     pub fn count(&self) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push_head`
[INFO] [stderr]    --> src/list.rs:101:5
[INFO] [stderr]     |
[INFO] [stderr] 101 |     pub fn push_head(&mut self, node: Unique<T>) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pop_head`
[INFO] [stderr]    --> src/list.rs:139:5
[INFO] [stderr]     |
[INFO] [stderr] 139 |     pub fn pop_head(&mut self) -> Option<Unique<T>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pop_tail`
[INFO] [stderr]    --> src/list.rs:156:5
[INFO] [stderr]     |
[INFO] [stderr] 156 |     pub fn pop_tail(&mut self) -> Option<Unique<T>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `detach`
[INFO] [stderr]    --> src/list.rs:177:5
[INFO] [stderr]     |
[INFO] [stderr] 177 |     pub fn detach(&mut self, mut target: NonNull<T>) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `iter_mut`
[INFO] [stderr]    --> src/list.rs:205:5
[INFO] [stderr]     |
[INFO] [stderr] 205 |     pub fn iter_mut(&mut self) -> IterMut<T> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `IterMut`
[INFO] [stderr]    --> src/list.rs:225:1
[INFO] [stderr]     |
[INFO] [stderr] 225 | pub struct IterMut<'a, T: 'a + Node<T>>(Option<NonNull<T>>, PhantomData<&'a T>);
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `update_kernel_addr_end_physical`
[INFO] [stderr]   --> src/memory/address.rs:38:1
[INFO] [stderr]    |
[INFO] [stderr] 38 | pub fn update_kernel_addr_end_physical(new_addr: PhysicalAddress) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `obj_ptr`
[INFO] [stderr]   --> src/memory/buddy_system/allocator.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     obj_ptr: Unique<T>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `obj_count`
[INFO] [stderr]   --> src/memory/buddy_system/allocator.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     obj_count: usize,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `free_lists`
[INFO] [stderr]   --> src/memory/buddy_system/allocator.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     free_lists: [LinkedList<T>; MAX_ORDER],
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_managed_obj`
[INFO] [stderr]   --> src/memory/buddy_system/allocator.rs:62:5
[INFO] [stderr]    |
[INFO] [stderr] 62 |     fn is_managed_obj(&self, ptr: *const T) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `buddy`
[INFO] [stderr]   --> src/memory/buddy_system/allocator.rs:70:5
[INFO] [stderr]    |
[INFO] [stderr] 70 |     fn buddy(&self, obj: Unique<T>, order: usize) -> Option<NonNull<T>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `allocate`
[INFO] [stderr]   --> src/memory/buddy_system/allocator.rs:95:5
[INFO] [stderr]    |
[INFO] [stderr] 95 |     pub fn allocate(&mut self, request_order: usize) -> Option<Unique<T>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `free`
[INFO] [stderr]    --> src/memory/buddy_system/allocator.rs:142:5
[INFO] [stderr]     |
[INFO] [stderr] 142 |     pub fn free(&mut self, mut obj: Unique<T>) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `number`
[INFO] [stderr]   --> src/memory/frame.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     number: usize,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_addr`
[INFO] [stderr]   --> src/memory/frame.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn from_addr(addr: VirtualAddress) -> Frame {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `level4_index`
[INFO] [stderr]   --> src/memory/frame.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     pub fn level4_index(&self) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `level3_index`
[INFO] [stderr]   --> src/memory/frame.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pub fn level3_index(&self) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `level2_index`
[INFO] [stderr]   --> src/memory/frame.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn level2_index(&self) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `level1_index`
[INFO] [stderr]   --> src/memory/frame.rs:47:5
[INFO] [stderr]    |
[INFO] [stderr] 47 |     pub fn level1_index(&self) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `clear_all`
[INFO] [stderr]   --> src/memory/paging/entry.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     pub fn clear_all(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_frame_addr`
[INFO] [stderr]   --> src/memory/paging/entry.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     pub fn set_frame_addr(&mut self, addr: usize) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_frame_addr`
[INFO] [stderr]   --> src/memory/paging/entry.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     pub fn get_frame_addr(&mut self) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `clear_all_entries`
[INFO] [stderr]   --> src/memory/paging/table.rs:57:5
[INFO] [stderr]    |
[INFO] [stderr] 57 |     fn clear_all_entries(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next_level_table_mut`
[INFO] [stderr]   --> src/memory/paging/table.rs:81:5
[INFO] [stderr]    |
[INFO] [stderr] 81 |     pub fn next_level_table_mut<'a>(&'a self, index: usize) -> Option<&'a mut Table<T::NextLevel>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `level4_page_table_mut`
[INFO] [stderr]    --> src/memory/paging/table.rs:121:5
[INFO] [stderr]     |
[INFO] [stderr] 121 |     pub fn level4_page_table_mut(&mut self) -> &mut Table<Level4> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Used`
[INFO] [stderr]   --> src/memory/region.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     Used,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `state`
[INFO] [stderr]   --> src/memory/region.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     pub fn state(&self) -> State {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `core::result::Result` that must be used
[INFO] [stderr]   --> src/arch/mod.rs:11:42
[INFO] [stderr]    |
[INFO] [stderr] 11 |             $x::init(argv, region_manager);
[INFO] [stderr]    |                                          ^^
[INFO] [stderr] ...
[INFO] [stderr] 25 | generate!(x86_64);
[INFO] [stderr]    | ------------------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `axel`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "89b7791cb9a8bb217d556cbf338259aeac67fadea09d94068ceff832978d2480"`
[INFO] running `"docker" "rm" "-f" "89b7791cb9a8bb217d556cbf338259aeac67fadea09d94068ceff832978d2480"`
[INFO] [stdout] 89b7791cb9a8bb217d556cbf338259aeac67fadea09d94068ceff832978d2480