[INFO] fetching crate os_essentials 0.0.3...
[INFO] checking os_essentials-0.0.3 against try#012cd62c9add58ab3910e44c137d87db3ab70f61 for pr-155915
[INFO] extracting crate os_essentials 0.0.3 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate os_essentials 0.0.3
[INFO] finished tweaking crates.io crate os_essentials 0.0.3
[INFO] tweaked toml for crates.io crate os_essentials 0.0.3 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate os_essentials 0.0.3 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 13 packages to latest compatible versions
[INFO] [stderr]       Adding heapless v0.8.0 (available: v0.9.3)
[INFO] [stderr]       Adding spin v0.9.8 (available: v0.10.0)
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] b19f2a28c8b7ae25cf579db36408ab1ffef3f8c328217dcfd869316e1725d836
[INFO] running `Command { std: "docker" "start" "-a" "b19f2a28c8b7ae25cf579db36408ab1ffef3f8c328217dcfd869316e1725d836", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b19f2a28c8b7ae25cf579db36408ab1ffef3f8c328217dcfd869316e1725d836", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b19f2a28c8b7ae25cf579db36408ab1ffef3f8c328217dcfd869316e1725d836", kill_on_drop: false }`
[INFO] [stdout] b19f2a28c8b7ae25cf579db36408ab1ffef3f8c328217dcfd869316e1725d836
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] df7dbcd5183b0f46bf72ad9068c4b8c112a54a3e773dc0d71eaf54621e8cd858
[INFO] running `Command { std: "docker" "start" "-a" "df7dbcd5183b0f46bf72ad9068c4b8c112a54a3e773dc0d71eaf54621e8cd858", kill_on_drop: false }`
[INFO] [stderr]    Compiling heapless v0.8.0
[INFO] [stderr]     Checking bit_field v0.10.3
[INFO] [stderr]     Checking volatile v0.4.6
[INFO] [stderr]     Checking hash32 v0.3.1
[INFO] [stderr]     Checking x86_64 v0.15.4
[INFO] [stderr]     Checking os_essentials v0.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `AtomicUsize` and `Ordering`
[INFO] [stdout]  --> src/vga.rs:1:26
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::sync::atomic::{AtomicUsize, Ordering};
[INFO] [stdout]   |                          ^^^^^^^^^^^  ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::ptr::null_mut`
[INFO] [stdout]   --> src/vga.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     use core::ptr::null_mut;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the `#![no_std]` attribute can only be used at the crate root
[INFO] [stdout]  --> src/uxstring.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![no_std]
[INFO] [stdout]   | ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the `#![no_std]` attribute can only be used at the crate root
[INFO] [stdout]  --> src/osalloc.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![no_std]
[INFO] [stdout]   | ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `AtomicUsize` and `Ordering`
[INFO] [stdout]  --> src/vga.rs:1:26
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::sync::atomic::{AtomicUsize, Ordering};
[INFO] [stdout]   |                          ^^^^^^^^^^^  ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::ptr::null_mut`
[INFO] [stdout]   --> src/vga.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     use core::ptr::null_mut;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the `#![no_std]` attribute can only be used at the crate root
[INFO] [stdout]  --> src/uxstring.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![no_std]
[INFO] [stdout]   | ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the `#![no_std]` attribute can only be used at the crate root
[INFO] [stdout]  --> src/osalloc.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![no_std]
[INFO] [stdout]   | ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `current_cell`
[INFO] [stdout]   --> src/vga.rs:60:17
[INFO] [stdout]    |
[INFO] [stdout] 60 |             let current_cell = unsafe { VGA_MEMORY.add(offset).read_volatile() };
[INFO] [stdout]    |                 ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_current_cell`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `current_cell`
[INFO] [stdout]   --> src/vga.rs:60:17
[INFO] [stdout]    |
[INFO] [stdout] 60 |             let current_cell = unsafe { VGA_MEMORY.add(offset).read_volatile() };
[INFO] [stdout]    |                 ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_current_cell`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line_size`
[INFO] [stdout]    --> src/vga.rs:176:13
[INFO] [stdout]     |
[INFO] [stdout] 176 |         let line_size = VGA_WIDTH;
[INFO] [stdout]     |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_line_size`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line_size`
[INFO] [stdout]    --> src/vga.rs:176:13
[INFO] [stdout]     |
[INFO] [stdout] 176 |         let line_size = VGA_WIDTH;
[INFO] [stdout]     |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_line_size`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.17s
[INFO] running `Command { std: "docker" "inspect" "df7dbcd5183b0f46bf72ad9068c4b8c112a54a3e773dc0d71eaf54621e8cd858", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df7dbcd5183b0f46bf72ad9068c4b8c112a54a3e773dc0d71eaf54621e8cd858", kill_on_drop: false }`
[INFO] [stdout] df7dbcd5183b0f46bf72ad9068c4b8c112a54a3e773dc0d71eaf54621e8cd858