[INFO] cloning repository https://github.com/RMuskovets/rust-os
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/RMuskovets/rust-os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRMuskovets%2Frust-os"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRMuskovets%2Frust-os'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0bad528fd6b9123cc4b30d2119812730c58c1524
[INFO] checking RMuskovets/rust-os against try#8a749131e7beb72f6edacefd2bdcbed3d67b2112 for pr-72331
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRMuskovets%2Frust-os" "/workspace/builds/worker-8/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/RMuskovets/rust-os on toolchain 8a749131e7beb72f6edacefd2bdcbed3d67b2112
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8a749131e7beb72f6edacefd2bdcbed3d67b2112" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/RMuskovets/rust-os
[INFO] finished tweaking git repo https://github.com/RMuskovets/rust-os
[INFO] tweaked toml for git repo https://github.com/RMuskovets/rust-os written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/RMuskovets/rust-os already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8a749131e7beb72f6edacefd2bdcbed3d67b2112" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=forbid" "-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" "+8a749131e7beb72f6edacefd2bdcbed3d67b2112" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e9cfdb6608f7b2f275c7efb23724a96f79f2f312973950fe10cfd350b0ae525e
[INFO] running `"docker" "start" "-a" "e9cfdb6608f7b2f275c7efb23724a96f79f2f312973950fe10cfd350b0ae525e"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling x86_64 v0.9.6
[INFO] [stderr]     Checking cpuio v0.2.0
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]     Checking bit_field v0.9.0
[INFO] [stderr]     Checking pc-keyboard v0.5.0
[INFO] [stderr]     Checking multiboot v0.3.0
[INFO] [stderr]     Checking volatile v0.2.6
[INFO] [stderr]     Checking bitflags v1.2.1
[INFO] [stderr]     Checking pic8259_simple v0.1.1
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking rust-os v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `panic`
[INFO] [stderr]  --> src/hardware/memmap.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     panic,
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::panic`
[INFO] [stderr]  --> src/multiboot/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use crate::panic;
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant `ACPI_AVAILABLE` should have an upper camel case name
[INFO] [stderr]    --> src/multiboot/mod.rs:169:5
[INFO] [stderr]     |
[INFO] [stderr] 169 |     ACPI_AVAILABLE,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `AcpiAvailable`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant `RESERVED_HIBERNATE` should have an upper camel case name
[INFO] [stderr]    --> src/multiboot/mod.rs:170:5
[INFO] [stderr]     |
[INFO] [stderr] 170 |     RESERVED_HIBERNATE,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `ReservedHibernate`
[INFO] [stderr] 
[INFO] [stderr] error: language item required, but not found: `eh_personality`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `panic`
[INFO] [stderr]  --> src/hardware/memmap.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     panic,
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::panic`
[INFO] [stderr]  --> src/multiboot/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use crate::panic;
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant `ACPI_AVAILABLE` should have an upper camel case name
[INFO] [stderr]    --> src/multiboot/mod.rs:169:5
[INFO] [stderr]     |
[INFO] [stderr] 169 |     ACPI_AVAILABLE,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `AcpiAvailable`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant `RESERVED_HIBERNATE` should have an upper camel case name
[INFO] [stderr]    --> src/multiboot/mod.rs:170:5
[INFO] [stderr]     |
[INFO] [stderr] 170 |     RESERVED_HIBERNATE,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `ReservedHibernate`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error; 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `rust-os`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: unused variable: `frame`
[INFO] [stderr]   --> src/hardware/idt.rs:42:41
[INFO] [stderr]    |
[INFO] [stderr] 42 | extern "x86-interrupt" fn on_timer_tick(frame: &mut InterruptStackFrame) {
[INFO] [stderr]    |                                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_frame`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `frame`
[INFO] [stderr]   --> src/hardware/idt.rs:50:39
[INFO] [stderr]    |
[INFO] [stderr] 50 | extern "x86-interrupt" fn on_keyboard(frame: &mut InterruptStackFrame) {
[INFO] [stderr]    |                                       ^^^^^ help: if this is intentional, prefix it with an underscore: `_frame`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Blue`
[INFO] [stderr]   --> src/vga.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     Blue = 1,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Green`
[INFO] [stderr]   --> src/vga.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     Green = 2,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Cyan`
[INFO] [stderr]   --> src/vga.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     Cyan = 3,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Red`
[INFO] [stderr]   --> src/vga.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     Red = 4,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Magenta`
[INFO] [stderr]   --> src/vga.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     Magenta = 5,
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Brown`
[INFO] [stderr]   --> src/vga.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     Brown = 6,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `LightGray`
[INFO] [stderr]   --> src/vga.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     LightGray = 7,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `DarkGray`
[INFO] [stderr]   --> src/vga.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     DarkGray = 8,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `LightBlue`
[INFO] [stderr]   --> src/vga.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     LightBlue = 9,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `LightGreen`
[INFO] [stderr]   --> src/vga.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     LightGreen = 10,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `LightCyan`
[INFO] [stderr]   --> src/vga.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     LightCyan = 11,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `LightRed`
[INFO] [stderr]   --> src/vga.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     LightRed = 12,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Pink`
[INFO] [stderr]   --> src/vga.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     Pink = 13,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `White`
[INFO] [stderr]   --> src/vga.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     White = 15,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `lighter`
[INFO] [stderr]   --> src/vga.rs:30:12
[INFO] [stderr]    |
[INFO] [stderr] 30 |     pub fn lighter(self: &mut Color) -> Color {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `darker`
[INFO] [stderr]   --> src/vga.rs:45:12
[INFO] [stderr]    |
[INFO] [stderr] 45 |     pub fn darker(self: &mut Color) -> Color {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `MF`
[INFO] [stderr]   --> src/hardware.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub type MF<'a> = dyn Fn(PAddr, usize) -> Option<&'a [u8]>;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get`
[INFO] [stderr]    --> src/multiboot/mod.rs:128:12
[INFO] [stderr]     |
[INFO] [stderr] 128 |     pub fn get(&self, idx: u32) -> &T {
[INFO] [stderr]     |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `iter`
[INFO] [stderr]    --> src/multiboot/mod.rs:136:12
[INFO] [stderr]     |
[INFO] [stderr] 136 |     pub fn iter(&self) -> ArrayIter<T> {
[INFO] [stderr]     |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `AVAILABLE`
[INFO] [stderr]    --> src/multiboot/mod.rs:168:5
[INFO] [stderr]     |
[INFO] [stderr] 168 |     AVAILABLE,
[INFO] [stderr]     |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ACPI_AVAILABLE`
[INFO] [stderr]    --> src/multiboot/mod.rs:169:5
[INFO] [stderr]     |
[INFO] [stderr] 169 |     ACPI_AVAILABLE,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `RESERVED_HIBERNATE`
[INFO] [stderr]    --> src/multiboot/mod.rs:170:5
[INFO] [stderr]     |
[INFO] [stderr] 170 |     RESERVED_HIBERNATE,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `DEFECTIVE`
[INFO] [stderr]    --> src/multiboot/mod.rs:171:5
[INFO] [stderr]     |
[INFO] [stderr] 171 |     DEFECTIVE,
[INFO] [stderr]     |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `RESERVED`
[INFO] [stderr]    --> src/multiboot/mod.rs:172:5
[INFO] [stderr]     |
[INFO] [stderr] 172 |     RESERVED
[INFO] [stderr]     |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `typ`
[INFO] [stderr]    --> src/multiboot/mod.rs:177:12
[INFO] [stderr]     |
[INFO] [stderr] 177 |     pub fn typ(&self) -> PageType {
[INFO] [stderr]     |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]  --> src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![no_main]
[INFO] [stderr]   | ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_attributes)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: crate-level attribute should be in the root module
[INFO] [stderr]  --> src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![no_main]
[INFO] [stderr]   | ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `stack_size` should have an upper case name
[INFO] [stderr]   --> src/hardware/gdt.rs:17:19
[INFO] [stderr]    |
[INFO] [stderr] 17 |             const stack_size: usize = 4096;
[INFO] [stderr]    |                   ^^^^^^^^^^ help: convert the identifier to upper case: `STACK_SIZE`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: static variable `stack` should have an upper case name
[INFO] [stderr]   --> src/hardware/gdt.rs:18:24
[INFO] [stderr]    |
[INFO] [stderr] 18 |             static mut stack: [u8; stack_size] = [0; stack_size];
[INFO] [stderr]    |                        ^^^^^ help: convert the identifier to upper case: `STACK`
[INFO] [stderr] 
[INFO] [stderr] warning: 35 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "e9cfdb6608f7b2f275c7efb23724a96f79f2f312973950fe10cfd350b0ae525e"`
[INFO] running `"docker" "rm" "-f" "e9cfdb6608f7b2f275c7efb23724a96f79f2f312973950fe10cfd350b0ae525e"`
[INFO] [stdout] e9cfdb6608f7b2f275c7efb23724a96f79f2f312973950fe10cfd350b0ae525e