[INFO] fetching crate armv8a_semihosting 0.0.1...
[INFO] checking armv8a_semihosting-0.0.1 against master#b286722878e18db29a7fbe672be7c4d3b02e8e4d for pr-127655
[INFO] extracting crate armv8a_semihosting 0.0.1 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate armv8a_semihosting 0.0.1 on toolchain b286722878e18db29a7fbe672be7c4d3b02e8e4d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b286722878e18db29a7fbe672be7c4d3b02e8e4d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate armv8a_semihosting 0.0.1
[INFO] finished tweaking crates.io crate armv8a_semihosting 0.0.1
[INFO] tweaked toml for crates.io crate armv8a_semihosting 0.0.1 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b286722878e18db29a7fbe672be7c4d3b02e8e4d" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b286722878e18db29a7fbe672be7c4d3b02e8e4d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+b286722878e18db29a7fbe672be7c4d3b02e8e4d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f18a765963859cac11e595ea62e1d6760dc0a7b70769b7c2b8f6be3eef6ee724
[INFO] running `Command { std: "docker" "start" "-a" "f18a765963859cac11e595ea62e1d6760dc0a7b70769b7c2b8f6be3eef6ee724", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f18a765963859cac11e595ea62e1d6760dc0a7b70769b7c2b8f6be3eef6ee724", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f18a765963859cac11e595ea62e1d6760dc0a7b70769b7c2b8f6be3eef6ee724", kill_on_drop: false }`
[INFO] [stdout] f18a765963859cac11e595ea62e1d6760dc0a7b70769b7c2b8f6be3eef6ee724
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+b286722878e18db29a7fbe672be7c4d3b02e8e4d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 104f27900b99983711a34b3fd6311988167a31c84da5085711fa017c9924a172
[INFO] running `Command { std: "docker" "start" "-a" "104f27900b99983711a34b3fd6311988167a31c84da5085711fa017c9924a172", kill_on_drop: false }`
[INFO] [stderr]     Checking armv8a_semihosting v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: invalid register `x0`: unknown register
[INFO] [stdout]   --> src/lib.rs:29:25
[INFO] [stdout]    |
[INFO] [stdout] 29 |     asm!("hlt #0xF000", inout("x0") nr => nr, in("x1") arg);
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: invalid register `x1`: unknown register
[INFO] [stdout]   --> src/lib.rs:29:47
[INFO] [stdout]    |
[INFO] [stdout] 29 |     asm!("hlt #0xF000", inout("x0") nr => nr, in("x1") arg);
[INFO] [stdout]    |                                               ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: invalid register `x0`: unknown register
[INFO] [stdout]   --> src/lib.rs:29:25
[INFO] [stdout]    |
[INFO] [stdout] 29 |     asm!("hlt #0xF000", inout("x0") nr => nr, in("x1") arg);
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: invalid register `x1`: unknown register
[INFO] [stdout]   --> src/lib.rs:29:47
[INFO] [stdout]    |
[INFO] [stdout] 29 |     asm!("hlt #0xF000", inout("x0") nr => nr, in("x1") arg);
[INFO] [stdout]    |                                               ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0605]: non-primitive cast: `()` as `isize`
[INFO] [stdout]   --> src/hio.rs:60:11
[INFO] [stdout]    |
[INFO] [stdout] 60 |       match unsafe { syscall!(OPEN, name.as_ptr(), mode, name.len() - 1) } as
[INFO] [stdout]    |  ___________^
[INFO] [stdout] 61 | |         isize {
[INFO] [stdout]    | |_____________^ an `as` expression can only be used to convert between primitive types or to coerce to a specific trait object
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/hio.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |         match unsafe { syscall!(WRITE, fd, buffer.as_ptr(), buffer.len()) } {
[INFO] [stdout]    |               ------------------------------------------------------------- this expression has type `()`
[INFO] [stdout] 70 |             // Done
[INFO] [stdout] 71 |             0 => return Ok(()),
[INFO] [stdout]    |             ^ expected `()`, found integer
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0605]: non-primitive cast: `()` as `isize`
[INFO] [stdout]   --> src/hio.rs:60:11
[INFO] [stdout]    |
[INFO] [stdout] 60 |       match unsafe { syscall!(OPEN, name.as_ptr(), mode, name.len() - 1) } as
[INFO] [stdout]    |  ___________^
[INFO] [stdout] 61 | |         isize {
[INFO] [stdout]    | |_____________^ an `as` expression can only be used to convert between primitive types or to coerce to a specific trait object
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/hio.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |         match unsafe { syscall!(WRITE, fd, buffer.as_ptr(), buffer.len()) } {
[INFO] [stdout]    |               ------------------------------------------------------------- this expression has type `()`
[INFO] [stdout] 70 |             // Done
[INFO] [stdout] 71 |             0 => return Ok(()),
[INFO] [stdout]    |             ^ expected `()`, found integer
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/hio.rs:73:23
[INFO] [stdout]    |
[INFO] [stdout] 73 |             n if n <= buffer.len() => {
[INFO] [stdout]    |                  -    ^^^^^^^^^^^^ expected `()`, found `usize`
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  expected because this is `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/hio.rs:73:23
[INFO] [stdout]    |
[INFO] [stdout] 73 |             n if n <= buffer.len() => {
[INFO] [stdout]    |                  -    ^^^^^^^^^^^^ expected `()`, found `usize`
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  expected because this is `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: cannot subtract `()` from `usize`
[INFO] [stdout]   --> src/hio.rs:74:44
[INFO] [stdout]    |
[INFO] [stdout] 74 |                 let offset = (buffer.len() - n) as isize;
[INFO] [stdout]    |                                            ^ no implementation for `usize - ()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Sub<()>` is not implemented for `usize`
[INFO] [stdout]    = help: the following other types implement trait `Sub<Rhs>`:
[INFO] [stdout]              `&'a usize` implements `Sub<usize>`
[INFO] [stdout]              `&usize` implements `Sub<&usize>`
[INFO] [stdout]              `usize` implements `Sub<&usize>`
[INFO] [stdout]              `usize` implements `Sub`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: cannot subtract `()` from `usize`
[INFO] [stdout]   --> src/hio.rs:74:44
[INFO] [stdout]    |
[INFO] [stdout] 74 |                 let offset = (buffer.len() - n) as isize;
[INFO] [stdout]    |                                            ^ no implementation for `usize - ()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Sub<()>` is not implemented for `usize`
[INFO] [stdout]    = help: the following other types implement trait `Sub<Rhs>`:
[INFO] [stdout]              `&'a usize` implements `Sub<usize>`
[INFO] [stdout]              `&usize` implements `Sub<&usize>`
[INFO] [stdout]              `usize` implements `Sub<&usize>`
[INFO] [stdout]              `usize` implements `Sub`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/hio.rs:76:75
[INFO] [stdout]    |
[INFO] [stdout] 76 |                     slice::from_raw_parts(buffer.as_ptr().offset(offset), n)
[INFO] [stdout]    |                     ---------------------                                 ^ expected `usize`, found `()`
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     arguments to this function are incorrect
[INFO] [stdout]    |
[INFO] [stdout] note: function defined here
[INFO] [stdout]   --> /rustc/b286722878e18db29a7fbe672be7c4d3b02e8e4d/library/core/src/slice/raw.rs:125:21
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/hio.rs:76:75
[INFO] [stdout]    |
[INFO] [stdout] 76 |                     slice::from_raw_parts(buffer.as_ptr().offset(offset), n)
[INFO] [stdout]    |                     ---------------------                                 ^ expected `usize`, found `()`
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     arguments to this function are incorrect
[INFO] [stdout]    |
[INFO] [stdout] note: function defined here
[INFO] [stdout]   --> /rustc/b286722878e18db29a7fbe672be7c4d3b02e8e4d/library/core/src/slice/raw.rs:125:21
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 7 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0308, E0605.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 7 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0308, E0605.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `armv8a_semihosting` (lib) due to 8 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `armv8a_semihosting` (lib test) due to 8 previous errors
[INFO] running `Command { std: "docker" "inspect" "104f27900b99983711a34b3fd6311988167a31c84da5085711fa017c9924a172", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "104f27900b99983711a34b3fd6311988167a31c84da5085711fa017c9924a172", kill_on_drop: false }`
[INFO] [stdout] 104f27900b99983711a34b3fd6311988167a31c84da5085711fa017c9924a172
[INFO] checking armv8a_semihosting-0.0.1 against try#6a5749073f2ebf59d7740d30e50a932a85756ee7 for pr-127655
[INFO] extracting crate armv8a_semihosting 0.0.1 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate armv8a_semihosting 0.0.1 on toolchain 6a5749073f2ebf59d7740d30e50a932a85756ee7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6a5749073f2ebf59d7740d30e50a932a85756ee7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate armv8a_semihosting 0.0.1
[INFO] finished tweaking crates.io crate armv8a_semihosting 0.0.1
[INFO] tweaked toml for crates.io crate armv8a_semihosting 0.0.1 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6a5749073f2ebf59d7740d30e50a932a85756ee7" "generate-lockfile" "--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: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6a5749073f2ebf59d7740d30e50a932a85756ee7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+6a5749073f2ebf59d7740d30e50a932a85756ee7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3c5f1421558f8e3408ff54ef8688b277bdd72bd96869a534676b868a77792651
[INFO] running `Command { std: "docker" "start" "-a" "3c5f1421558f8e3408ff54ef8688b277bdd72bd96869a534676b868a77792651", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3c5f1421558f8e3408ff54ef8688b277bdd72bd96869a534676b868a77792651", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c5f1421558f8e3408ff54ef8688b277bdd72bd96869a534676b868a77792651", kill_on_drop: false }`
[INFO] [stdout] 3c5f1421558f8e3408ff54ef8688b277bdd72bd96869a534676b868a77792651
[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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+6a5749073f2ebf59d7740d30e50a932a85756ee7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1fc2f921386288907bb6e1a8eec300a2528fd762d593de62a4e64d73bd8ed5c7
[INFO] running `Command { std: "docker" "start" "-a" "1fc2f921386288907bb6e1a8eec300a2528fd762d593de62a4e64d73bd8ed5c7", kill_on_drop: false }`
[INFO] [stderr]     Checking armv8a_semihosting v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: invalid register `x0`: unknown register
[INFO] [stdout]   --> src/lib.rs:29:25
[INFO] [stdout]    |
[INFO] [stdout] 29 |     asm!("hlt #0xF000", inout("x0") nr => nr, in("x1") arg);
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: invalid register `x1`: unknown register
[INFO] [stdout]   --> src/lib.rs:29:47
[INFO] [stdout]    |
[INFO] [stdout] 29 |     asm!("hlt #0xF000", inout("x0") nr => nr, in("x1") arg);
[INFO] [stdout]    |                                               ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: invalid register `x0`: unknown register
[INFO] [stdout]   --> src/lib.rs:29:25
[INFO] [stdout]    |
[INFO] [stdout] 29 |     asm!("hlt #0xF000", inout("x0") nr => nr, in("x1") arg);
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: invalid register `x1`: unknown register
[INFO] [stdout]   --> src/lib.rs:29:47
[INFO] [stdout]    |
[INFO] [stdout] 29 |     asm!("hlt #0xF000", inout("x0") nr => nr, in("x1") arg);
[INFO] [stdout]    |                                               ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0605]: non-primitive cast: `()` as `isize`
[INFO] [stdout]   --> src/hio.rs:60:11
[INFO] [stdout]    |
[INFO] [stdout] 60 |       match unsafe { syscall!(OPEN, name.as_ptr(), mode, name.len() - 1) } as
[INFO] [stdout]    |  ___________^
[INFO] [stdout] 61 | |         isize {
[INFO] [stdout]    | |_____________^ an `as` expression can only be used to convert between primitive types or to coerce to a specific trait object
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/hio.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |         match unsafe { syscall!(WRITE, fd, buffer.as_ptr(), buffer.len()) } {
[INFO] [stdout]    |               ------------------------------------------------------------- this expression has type `()`
[INFO] [stdout] 70 |             // Done
[INFO] [stdout] 71 |             0 => return Ok(()),
[INFO] [stdout]    |             ^ expected `()`, found integer
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/hio.rs:73:23
[INFO] [stdout]    |
[INFO] [stdout] 73 |             n if n <= buffer.len() => {
[INFO] [stdout]    |                  -    ^^^^^^^^^^^^ expected `()`, found `usize`
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  expected because this is `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0605]: non-primitive cast: `()` as `isize`
[INFO] [stdout]   --> src/hio.rs:60:11
[INFO] [stdout]    |
[INFO] [stdout] 60 |       match unsafe { syscall!(OPEN, name.as_ptr(), mode, name.len() - 1) } as
[INFO] [stdout]    |  ___________^
[INFO] [stdout] 61 | |         isize {
[INFO] [stdout]    | |_____________^ an `as` expression can only be used to convert between primitive types or to coerce to a specific trait object
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/hio.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |         match unsafe { syscall!(WRITE, fd, buffer.as_ptr(), buffer.len()) } {
[INFO] [stdout]    |               ------------------------------------------------------------- this expression has type `()`
[INFO] [stdout] 70 |             // Done
[INFO] [stdout] 71 |             0 => return Ok(()),
[INFO] [stdout]    |             ^ expected `()`, found integer
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/hio.rs:73:23
[INFO] [stdout]    |
[INFO] [stdout] 73 |             n if n <= buffer.len() => {
[INFO] [stdout]    |                  -    ^^^^^^^^^^^^ expected `()`, found `usize`
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  expected because this is `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: cannot subtract `()` from `usize`
[INFO] [stdout]   --> src/hio.rs:74:44
[INFO] [stdout]    |
[INFO] [stdout] 74 |                 let offset = (buffer.len() - n) as isize;
[INFO] [stdout]    |                                            ^ no implementation for `usize - ()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Sub<()>` is not implemented for `usize`
[INFO] [stdout]    = help: the following other types implement trait `Sub<Rhs>`:
[INFO] [stdout]              `&'a usize` implements `Sub<usize>`
[INFO] [stdout]              `&usize` implements `Sub<&usize>`
[INFO] [stdout]              `usize` implements `Sub<&usize>`
[INFO] [stdout]              `usize` implements `Sub`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/hio.rs:76:75
[INFO] [stdout]    |
[INFO] [stdout] 76 |                     slice::from_raw_parts(buffer.as_ptr().offset(offset), n)
[INFO] [stdout]    |                     ---------------------                                 ^ expected `usize`, found `()`
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     arguments to this function are incorrect
[INFO] [stdout]    |
[INFO] [stdout] note: function defined here
[INFO] [stdout]   --> /rustc/6a5749073f2ebf59d7740d30e50a932a85756ee7/library/core/src/slice/raw.rs:125:21
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 7 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0308, E0605.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: cannot subtract `()` from `usize`
[INFO] [stdout]   --> src/hio.rs:74:44
[INFO] [stdout]    |
[INFO] [stdout] 74 |                 let offset = (buffer.len() - n) as isize;
[INFO] [stdout]    |                                            ^ no implementation for `usize - ()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Sub<()>` is not implemented for `usize`
[INFO] [stdout]    = help: the following other types implement trait `Sub<Rhs>`:
[INFO] [stdout]              `&'a usize` implements `Sub<usize>`
[INFO] [stdout]              `&usize` implements `Sub<&usize>`
[INFO] [stdout]              `usize` implements `Sub<&usize>`
[INFO] [stdout]              `usize` implements `Sub`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/hio.rs:76:75
[INFO] [stdout]    |
[INFO] [stdout] 76 |                     slice::from_raw_parts(buffer.as_ptr().offset(offset), n)
[INFO] [stdout]    |                     ---------------------                                 ^ expected `usize`, found `()`
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     arguments to this function are incorrect
[INFO] [stdout]    |
[INFO] [stdout] note: function defined here
[INFO] [stdout]   --> /rustc/6a5749073f2ebf59d7740d30e50a932a85756ee7/library/core/src/slice/raw.rs:125:21
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 7 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0308, E0605.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `armv8a_semihosting` (lib test) due to 8 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `armv8a_semihosting` (lib) due to 8 previous errors
[INFO] running `Command { std: "docker" "inspect" "1fc2f921386288907bb6e1a8eec300a2528fd762d593de62a4e64d73bd8ed5c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1fc2f921386288907bb6e1a8eec300a2528fd762d593de62a4e64d73bd8ed5c7", kill_on_drop: false }`
[INFO] [stdout] 1fc2f921386288907bb6e1a8eec300a2528fd762d593de62a4e64d73bd8ed5c7
