[INFO] fetching crate vga_buffer_rs 0.1.2...
[INFO] testing vga_buffer_rs-0.1.2 against 1.75.0 for beta-1.76-1
[INFO] extracting crate vga_buffer_rs 0.1.2 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate vga_buffer_rs 0.1.2 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-3-tc1/source/rust-toolchain
[INFO] started tweaking crates.io crate vga_buffer_rs 0.1.2
[INFO] finished tweaking crates.io crate vga_buffer_rs 0.1.2
[INFO] tweaked toml for crates.io crate vga_buffer_rs 0.1.2 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 543a2d369a720d4ec34c4fde5021eaec3304bf24bb58928b74af2ee7bf7e104d
[INFO] running `Command { std: "docker" "start" "-a" "543a2d369a720d4ec34c4fde5021eaec3304bf24bb58928b74af2ee7bf7e104d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "543a2d369a720d4ec34c4fde5021eaec3304bf24bb58928b74af2ee7bf7e104d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "543a2d369a720d4ec34c4fde5021eaec3304bf24bb58928b74af2ee7bf7e104d", kill_on_drop: false }`
[INFO] [stdout] 543a2d369a720d4ec34c4fde5021eaec3304bf24bb58928b74af2ee7bf7e104d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0ad53e2210f7784e7f8f886dc77c69f69dcee3450af64db15bb2fee087242a35
[INFO] running `Command { std: "docker" "start" "-a" "0ad53e2210f7784e7f8f886dc77c69f69dcee3450af64db15bb2fee087242a35", kill_on_drop: false }`
[INFO] [stderr]    Compiling volatile v0.2.7
[INFO] [stderr]    Compiling vga_buffer_rs v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error: cannot find macro `llvm_asm` in this scope
[INFO] [stdout]   --> src/cursor.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |         llvm_asm!("outb %al,%dx"
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `llvm_asm` in this scope
[INFO] [stdout]   --> src/cursor.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |         llvm_asm!("outb %al,%dx"
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `llvm_asm` in this scope
[INFO] [stdout]   --> src/cursor.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |         llvm_asm!("outb %al,%dx"
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `llvm_asm` in this scope
[INFO] [stdout]   --> src/cursor.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |         llvm_asm!("outb %al,%dx"
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `llvm_asm` in this scope
[INFO] [stdout]   --> src/cursor.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |         llvm_asm!("outb %al, %dx"
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `llvm_asm` in this scope
[INFO] [stdout]   --> src/cursor.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         llvm_asm!("outb %al, %dx"
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(llvm_asm)]
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `llvm_asm`
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(llvm_asm)]
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 8 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `vga_buffer_rs` (lib) due to 9 previous errors
[INFO] running `Command { std: "docker" "inspect" "0ad53e2210f7784e7f8f886dc77c69f69dcee3450af64db15bb2fee087242a35", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ad53e2210f7784e7f8f886dc77c69f69dcee3450af64db15bb2fee087242a35", kill_on_drop: false }`
[INFO] [stdout] 0ad53e2210f7784e7f8f886dc77c69f69dcee3450af64db15bb2fee087242a35
