[INFO] fetching crate novusk_syscalls 0.2.1...
[INFO] checking novusk_syscalls-0.2.1 against master#af4a5a13a15fa0c60e06321077ef452f769b42fd for pr-122960-3
[INFO] extracting crate novusk_syscalls 0.2.1 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate novusk_syscalls 0.2.1 on toolchain af4a5a13a15fa0c60e06321077ef452f769b42fd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate novusk_syscalls 0.2.1
[INFO] finished tweaking crates.io crate novusk_syscalls 0.2.1
[INFO] tweaked toml for crates.io crate novusk_syscalls 0.2.1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate novusk_syscalls 0.2.1 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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "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-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a202a126486ad95d41a7c40d780a4789d373cbb82e8b15639261f77c70c935bc
[INFO] running `Command { std: "docker" "start" "-a" "a202a126486ad95d41a7c40d780a4789d373cbb82e8b15639261f77c70c935bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a202a126486ad95d41a7c40d780a4789d373cbb82e8b15639261f77c70c935bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a202a126486ad95d41a7c40d780a4789d373cbb82e8b15639261f77c70c935bc", kill_on_drop: false }`
[INFO] [stdout] a202a126486ad95d41a7c40d780a4789d373cbb82e8b15639261f77c70c935bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b10ee4d457ff49fddba75a7d67775c2c1ca06932dd7f9ca4f72326634d2d82a6
[INFO] running `Command { std: "docker" "start" "-a" "b10ee4d457ff49fddba75a7d67775c2c1ca06932dd7f9ca4f72326634d2d82a6", kill_on_drop: false }`
[INFO] [stderr]     Checking novusk_syscalls v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `sys_arg1`
[INFO] [stdout]  --> src/empty.rs:5:36
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub unsafe extern "C" fn sys_empty(sys_arg1: u8, sys_arg2: u8, sys_arg3: u8) -> u8 {
[INFO] [stdout]   |                                    ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sys_arg1`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sys_arg2`
[INFO] [stdout]  --> src/empty.rs:5:50
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub unsafe extern "C" fn sys_empty(sys_arg1: u8, sys_arg2: u8, sys_arg3: u8) -> u8 {
[INFO] [stdout]   |                                                  ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sys_arg2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sys_arg3`
[INFO] [stdout]  --> src/empty.rs:5:64
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub unsafe extern "C" fn sys_empty(sys_arg1: u8, sys_arg2: u8, sys_arg3: u8) -> u8 {
[INFO] [stdout]   |                                                                ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sys_arg3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sys_arg1`
[INFO] [stdout]  --> src/empty.rs:5:36
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub unsafe extern "C" fn sys_empty(sys_arg1: u8, sys_arg2: u8, sys_arg3: u8) -> u8 {
[INFO] [stdout]   |                                    ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sys_arg1`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sys_arg2`
[INFO] [stdout]  --> src/empty.rs:5:50
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub unsafe extern "C" fn sys_empty(sys_arg1: u8, sys_arg2: u8, sys_arg3: u8) -> u8 {
[INFO] [stdout]   |                                                  ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sys_arg2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sys_arg3`
[INFO] [stdout]  --> src/empty.rs:5:64
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub unsafe extern "C" fn sys_empty(sys_arg1: u8, sys_arg2: u8, sys_arg3: u8) -> u8 {
[INFO] [stdout]   |                                                                ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sys_arg3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `ret` is never read
[INFO] [stdout]   --> src/table.rs:33:17
[INFO] [stdout]    |
[INFO] [stdout] 33 |         let mut ret = 0;
[INFO] [stdout]    |                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/table.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |         let mut syscalls = self.syscalls.as_mut().unwrap();
[INFO] [stdout]    |             ----^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `ret` is never read
[INFO] [stdout]   --> src/table.rs:33:17
[INFO] [stdout]    |
[INFO] [stdout] 33 |         let mut ret = 0;
[INFO] [stdout]    |                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/table.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |         let mut syscalls = self.syscalls.as_mut().unwrap();
[INFO] [stdout]    |             ----^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `write`
[INFO] [stdout]  --> examples/write.rs:4:2
[INFO] [stdout]   |
[INFO] [stdout] 4 | }
[INFO] [stdout]   |  ^ consider adding a `main` function to `examples/write.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sys_arg3`
[INFO] [stdout]  --> examples/write.rs:1:64
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub unsafe extern "C" fn sys_write(sys_arg1: u8, sys_arg2: u8, sys_arg3: u8) -> u8 {
[INFO] [stdout]   |                                                                ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sys_arg3`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sys_arg3`
[INFO] [stdout]  --> examples/write.rs:1:64
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub unsafe extern "C" fn sys_write(sys_arg1: u8, sys_arg2: u8, sys_arg3: u8) -> u8 {
[INFO] [stdout]   |                                                                ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sys_arg3`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sys_arg3`
[INFO] [stdout]  --> examples/write.rs:1:64
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub unsafe extern "C" fn sys_write(sys_arg1: u8, sys_arg2: u8, sys_arg3: u8) -> u8 {
[INFO] [stdout]   |                                                                ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sys_arg3`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `novusk_syscalls` (example "write") due to 2 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b10ee4d457ff49fddba75a7d67775c2c1ca06932dd7f9ca4f72326634d2d82a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b10ee4d457ff49fddba75a7d67775c2c1ca06932dd7f9ca4f72326634d2d82a6", kill_on_drop: false }`
[INFO] [stdout] b10ee4d457ff49fddba75a7d67775c2c1ca06932dd7f9ca4f72326634d2d82a6