[INFO] cloning repository https://github.com/lZh1r/simple-rust-os
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lZh1r/simple-rust-os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FlZh1r%2Fsimple-rust-os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FlZh1r%2Fsimple-rust-os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 742d0ad628dc0bb567632b9aa8d06fba43110b51
[INFO] checking lZh1r/simple-rust-os against try#012cd62c9add58ab3910e44c137d87db3ab70f61 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FlZh1r%2Fsimple-rust-os" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-6-tc2/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/lZh1r/simple-rust-os
[INFO] removed 0 missing tests
[INFO] finished tweaking git repo https://github.com/lZh1r/simple-rust-os
[INFO] tweaked toml for git repo https://github.com/lZh1r/simple-rust-os written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/lZh1r/simple-rust-os on toolchain 012cd62c9add58ab3910e44c137d87db3ab70f61
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/lZh1r/simple-rust-os already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking lZh1r/simple-rust-os against try#012cd62c9add58ab3910e44c137d87db3ab70f61 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FlZh1r%2Fsimple-rust-os" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-6-tc2/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/lZh1r/simple-rust-os
[INFO] removed 0 missing tests
[INFO] finished tweaking git repo https://github.com/lZh1r/simple-rust-os
[INFO] tweaked toml for git repo https://github.com/lZh1r/simple-rust-os written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/lZh1r/simple-rust-os on toolchain 012cd62c9add58ab3910e44c137d87db3ab70f61
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/lZh1r/simple-rust-os already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded volatile v0.2.7
[INFO] [stderr]   Downloaded uart_16550 v0.3.2
[INFO] [stderr]   Downloaded volatile v0.4.6
[INFO] [stderr]   Downloaded pc-keyboard v0.8.0
[INFO] [stderr]   Downloaded conquer-util v0.3.0
[INFO] [stderr]   Downloaded rlibc v1.0.0
[INFO] [stderr]   Downloaded pic8259 v0.10.4
[INFO] [stderr]   Downloaded conquer-once v0.4.0
[INFO] [stderr]   Downloaded x86_64 v0.15.2
[INFO] [stderr]   Downloaded linked_list_allocator v0.9.1
[INFO] [stderr]   Downloaded bootloader v0.9.31
[INFO] [stderr]   Downloaded x86_64 v0.14.13
[INFO] [stderr]   Downloaded x86 v0.52.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e2bfc05315261493165854bb9719e209e352c617ce10e9dbe9f559febda466e9
[INFO] running `Command { std: "docker" "start" "-a" "e2bfc05315261493165854bb9719e209e352c617ce10e9dbe9f559febda466e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e2bfc05315261493165854bb9719e209e352c617ce10e9dbe9f559febda466e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2bfc05315261493165854bb9719e209e352c617ce10e9dbe9f559febda466e9", kill_on_drop: false }`
[INFO] [stdout] e2bfc05315261493165854bb9719e209e352c617ce10e9dbe9f559febda466e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] df808822aa831c7d995dfdf84a599ec7f2bf501ef11bb4c5622b2171412b3777
[INFO] running `Command { std: "docker" "start" "-a" "df808822aa831c7d995dfdf84a599ec7f2bf501ef11bb4c5622b2171412b3777", kill_on_drop: false }`
[INFO] [stderr]     Checking bit_field v0.10.2
[INFO] [stderr]     Checking volatile v0.4.6
[INFO] [stderr]    Compiling x86 v0.52.0
[INFO] [stderr]    Compiling bootloader v0.9.31
[INFO] [stderr]     Checking conquer-util v0.3.0
[INFO] [stderr]     Checking futures-core v0.3.31
[INFO] [stderr]     Checking raw-cpuid v10.7.0
[INFO] [stderr]     Checking volatile v0.2.7
[INFO] [stderr]     Checking rlibc v1.0.0
[INFO] [stderr]     Checking pc-keyboard v0.8.0
[INFO] [stderr]     Checking crossbeam-queue v0.3.12
[INFO] [stderr]     Checking spinning_top v0.2.5
[INFO] [stderr]     Checking spin v0.10.0
[INFO] [stderr]     Checking conquer-once v0.4.0
[INFO] [stderr]     Checking linked_list_allocator v0.9.1
[INFO] [stderr]     Checking futures-util v0.3.31
[INFO] [stderr]     Checking x86_64 v0.14.13
[INFO] [stderr]     Checking x86_64 v0.15.2
[INFO] [stderr]     Checking pic8259 v0.10.4
[INFO] [stderr]     Checking uart_16550 v0.3.2
[INFO] [stderr]     Checking os v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `qemu`
[INFO] [stdout]   --> src/test.rs:1:13
[INFO] [stdout]    |
[INFO] [stdout]  1 | use crate::{qemu, serial_print, serial_println};
[INFO] [stdout]    |             ^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: if this is a test module, consider adding a `#[cfg(test)]` to the containing module
[INFO] [stdout]   --> src/lib.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub mod test;
[INFO] [stdout]    | ^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::qemu::QemuExitCode`
[INFO] [stdout]   --> src/test.rs:2:5
[INFO] [stdout]    |
[INFO] [stdout]  2 | use crate::qemu::QemuExitCode;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: if this is a test module, consider adding a `#[cfg(test)]` to the containing module
[INFO] [stdout]   --> src/lib.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub mod test;
[INFO] [stdout]    | ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `alloc::alloc::GlobalAlloc`
[INFO] [stdout]  --> src/allocator.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use alloc::alloc::GlobalAlloc;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BootInfo` and `entry_point`
[INFO] [stdout]   --> src/lib.rs:21:18
[INFO] [stdout]    |
[INFO] [stdout] 21 | use bootloader::{entry_point, BootInfo};
[INFO] [stdout]    |                  ^^^^^^^^^^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `alloc::alloc::GlobalAlloc`
[INFO] [stdout]  --> src/allocator.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use alloc::alloc::GlobalAlloc;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unwinding panics are not supported without std
[INFO] [stdout]   |
[INFO] [stdout]   = help: using nightly cargo, use -Zbuild-std with panic="abort" to avoid unwinding
[INFO] [stdout]   = note: since the core library is usually precompiled with panic="unwind", rebuilding your crate with panic="abort" may not be enough to fix the problem
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/task/executor.rs:54:17
[INFO] [stdout]    |
[INFO] [stdout] 54 |             let mut task_option = {
[INFO] [stdout]    |                 ----^^^^^^^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/gdt.rs:11:70
[INFO] [stdout]    |
[INFO] [stdout] 11 |         tss.interrupt_stack_table[DOUBLE_FAULT_IST_INDEX as usize] = unsafe{
[INFO] [stdout]    |                                                                      ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_unsafe)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/task/executor.rs:54:17
[INFO] [stdout]    |
[INFO] [stdout] 54 |             let mut task_option = {
[INFO] [stdout]    |                 ----^^^^^^^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `ColorCode` is more private than the item `ColorWrite::write_with_color`
[INFO] [stdout]    --> src/vga_buffer.rs:143:5
[INFO] [stdout]     |
[INFO] [stdout] 143 |     fn write_with_color(&mut self, color_code: ColorCode, args: fmt::Arguments) -> fmt::Result;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ method `ColorWrite::write_with_color` is reachable at visibility `pub`
[INFO] [stdout]     |
[INFO] [stdout] note: but type `ColorCode` is only usable at visibility `pub(self)`
[INFO] [stdout]    --> src/vga_buffer.rs:32:1
[INFO] [stdout]     |
[INFO] [stdout]  32 | struct ColorCode(u8);
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^
[INFO] [stdout]     = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `ColorCode` is more private than the item `<Writer as ColorWrite>::write_with_color`
[INFO] [stdout]    --> src/vga_buffer.rs:147:5
[INFO] [stdout]     |
[INFO] [stdout] 147 |     fn write_with_color(&mut self, color_code: ColorCode, args: Arguments) -> fmt::Result {
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ method `<Writer as ColorWrite>::write_with_color` is reachable at visibility `pub`
[INFO] [stdout]     |
[INFO] [stdout] note: but type `ColorCode` is only usable at visibility `pub(self)`
[INFO] [stdout]    --> src/vga_buffer.rs:32:1
[INFO] [stdout]     |
[INFO] [stdout]  32 | struct ColorCode(u8);
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/gdt.rs:11:70
[INFO] [stdout]    |
[INFO] [stdout] 11 |         tss.interrupt_stack_table[DOUBLE_FAULT_IST_INDEX as usize] = unsafe{
[INFO] [stdout]    |                                                                      ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_unsafe)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `os` (lib test) due to 1 previous error; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "df808822aa831c7d995dfdf84a599ec7f2bf501ef11bb4c5622b2171412b3777", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df808822aa831c7d995dfdf84a599ec7f2bf501ef11bb4c5622b2171412b3777", kill_on_drop: false }`
[INFO] [stdout] df808822aa831c7d995dfdf84a599ec7f2bf501ef11bb4c5622b2171412b3777
