[INFO] cloning repository https://github.com/Lzebulon/Lzos
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Lzebulon/Lzos" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLzebulon%2FLzos", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLzebulon%2FLzos'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8e67790b102f65c6b4fb4101c0ddabd31cead11e
[INFO] checking Lzebulon/Lzos against try#18c1d185ac7a6a3bf399296b35e4b2736809a756 for pr-146972
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLzebulon%2FLzos" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-1-tc2/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-1-tc2/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/Lzebulon/Lzos
[INFO] finished tweaking git repo https://github.com/Lzebulon/Lzos
[INFO] tweaked toml for git repo https://github.com/Lzebulon/Lzos written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Lzebulon/Lzos on toolchain 18c1d185ac7a6a3bf399296b35e4b2736809a756
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+18c1d185ac7a6a3bf399296b35e4b2736809a756" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Lzebulon/Lzos 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" "+18c1d185ac7a6a3bf399296b35e4b2736809a756" "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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+18c1d185ac7a6a3bf399296b35e4b2736809a756" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5c9d0e3942b9d445602011115d3116c00ba9c25aee12e6bfcbbedf8cd0fe2c91
[INFO] running `Command { std: "docker" "start" "-a" "5c9d0e3942b9d445602011115d3116c00ba9c25aee12e6bfcbbedf8cd0fe2c91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5c9d0e3942b9d445602011115d3116c00ba9c25aee12e6bfcbbedf8cd0fe2c91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c9d0e3942b9d445602011115d3116c00ba9c25aee12e6bfcbbedf8cd0fe2c91", kill_on_drop: false }`
[INFO] [stdout] 5c9d0e3942b9d445602011115d3116c00ba9c25aee12e6bfcbbedf8cd0fe2c91
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+18c1d185ac7a6a3bf399296b35e4b2736809a756" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 09527b3d1ea66170758d5514dc71c11e939b0d48b3c170731369d7256cce009b
[INFO] running `Command { std: "docker" "start" "-a" "09527b3d1ea66170758d5514dc71c11e939b0d48b3c170731369d7256cce009b", kill_on_drop: false }`
[INFO] [stderr]     Checking lzos v0.1.0 (/opt/rustwide/workdir)
[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/interrupts.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |     let mut idt = InterruptsDescriptorTable::new();
[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] [stderr] error: could not compile `lzos` (bin "lzos" test) due to 1 previous error; 2 warnings emitted
[INFO] [stdout] warning: unused variable: `idt`
[INFO] [stdout]   --> src/interrupts.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |     let mut idt = InterruptsDescriptorTable::new();
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_idt`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/interrupts.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |     let mut idt = InterruptsDescriptorTable::new();
[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: unused variable: `idt`
[INFO] [stdout]   --> src/interrupts.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |     let mut idt = InterruptsDescriptorTable::new();
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_idt`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `GateDescriptor` is never constructed
[INFO] [stdout]  --> src/interrupts.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct GateDescriptor {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `TypeDescriptor` is never used
[INFO] [stdout]   --> src/interrupts.rs:17:6
[INFO] [stdout]    |
[INFO] [stdout] 17 | enum TypeDescriptor {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `load` is never used
[INFO] [stdout]   --> src/interrupts.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 53 | impl InterruptsDescriptorTable {
[INFO] [stdout]    | ------------------------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 58 |     fn load(&self) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `clear` is never used
[INFO] [stdout]    --> src/vga.rs:101:12
[INFO] [stdout]     |
[INFO] [stdout]  58 | impl Writer {
[INFO] [stdout]     | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 101 |     pub fn clear(&mut self) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "09527b3d1ea66170758d5514dc71c11e939b0d48b3c170731369d7256cce009b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09527b3d1ea66170758d5514dc71c11e939b0d48b3c170731369d7256cce009b", kill_on_drop: false }`
[INFO] [stdout] 09527b3d1ea66170758d5514dc71c11e939b0d48b3c170731369d7256cce009b