[INFO] cloning repository https://github.com/AbrarNitk/os-projects
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AbrarNitk/os-projects" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAbrarNitk%2Fos-projects", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAbrarNitk%2Fos-projects'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7dd56a029dc5227a8c9d292078378894e50187ec
[INFO] checking AbrarNitk/os-projects against 40527f3e444fde1deb361751bdef9b9e11d1b971+rustflags=--cfg crater_hack --force-warn invalid-c-variadic-arguments for pr-162478
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAbrarNitk%2Fos-projects" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/AbrarNitk/os-projects
[INFO] finished tweaking git repo https://github.com/AbrarNitk/os-projects
[INFO] tweaked toml for git repo https://github.com/AbrarNitk/os-projects written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/AbrarNitk/os-projects on toolchain 40527f3e444fde1deb361751bdef9b9e11d1b971
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+40527f3e444fde1deb361751bdef9b9e11d1b971" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/AbrarNitk/os-projects 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" "+40527f3e444fde1deb361751bdef9b9e11d1b971" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:8683fc1fc2eb5c9ac98e0d076ab094b2ffac7f99da555d2b6a2e27f346de2ec7" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 0664f3624d19db63de0ce57787788571432d0e499eab534d3e4c2a71d4e35b46
[INFO] running `Command { std: "docker" "start" "0664f3624d19db63de0ce57787788571432d0e499eab534d3e4c2a71d4e35b46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0664f3624d19db63de0ce57787788571432d0e499eab534d3e4c2a71d4e35b46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "0664f3624d19db63de0ce57787788571432d0e499eab534d3e4c2a71d4e35b46" "/opt/rustwide/cargo-home/bin/cargo" "+40527f3e444fde1deb361751bdef9b9e11d1b971" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0664f3624d19db63de0ce57787788571432d0e499eab534d3e4c2a71d4e35b46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid --cfg crater_hack --force-warn invalid-c-variadic-arguments" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "0664f3624d19db63de0ce57787788571432d0e499eab534d3e4c2a71d4e35b46" "/opt/rustwide/cargo-home/bin/cargo" "+40527f3e444fde1deb361751bdef9b9e11d1b971" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.186
[INFO] [stderr]    Compiling nix v0.31.3
[INFO] [stderr]     Checking small-cpu v0.1.0 (/opt/rustwide/workdir/small-cpu)
[INFO] [stderr]     Checking mem-alloc v0.1.0 (/opt/rustwide/workdir/mem-alloc)
[INFO] [stderr]     Checking parallel-zipper v0.1.0 (/opt/rustwide/workdir/parallel-zipper)
[INFO] [stderr]     Checking chacha20 v0.10.0
[INFO] [stderr]     Checking simple-kv v0.1.0 (/opt/rustwide/workdir/simple-kv)
[INFO] [stdout] warning: multiple fields are never read
[INFO] [stdout]   --> small-cpu/src/cpu.rs:3:5
[INFO] [stdout]    |
[INFO] [stdout]  1 | pub struct Cpu {
[INFO] [stdout]    |            --- fields in this struct
[INFO] [stdout]  2 |     // registers
[INFO] [stdout]  3 |     rax: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]  4 |     rcx: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]  5 |     rdx: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]  6 |     rbx: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]  7 |     rsp: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]  8 |     rbp: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]  9 |     rsi: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 10 |     rdi: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 11 |     r8: u64,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 12 |     r9: u64,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 13 |     r10: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 14 |     r11: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 15 |     r12: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 16 |     r13: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 17 |     r14: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     rip: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     stack_ptr: u64,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 24 |     stack_limit: u64, // could be the constant
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 25 |
[INFO] [stdout] 26 |     heap_ptr: u64,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |     zf: u8,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 30 |     sf: u8,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 31 |     of: u8,
[INFO] [stdout]    |     ^^
[INFO] [stdout] ...
[INFO] [stdout] 34 |     state: ProgramState,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `mem` is never read
[INFO] [stdout]  --> small-cpu/src/memory.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Memory {
[INFO] [stdout]   |            ------ field in this struct
[INFO] [stdout] 4 |     mem: [u8; MEMORY_SIZE],
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `stack` and `stack_ptr` are never read
[INFO] [stdout]  --> small-cpu/src/stack.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Stack {
[INFO] [stdout]   |            ----- fields in this struct
[INFO] [stdout] 4 |     stack: [u8; STACK_SIZE],
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 5 |     stack_ptr: usize,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> mem-alloc/src/simple.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |         let mut idx = get_idx(size);
[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: fields `buddies`, `available`, `size`, and `last` are never read
[INFO] [stdout]   --> mem-alloc/src/simple.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct Buddy {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 14 |     buddies: [Node; 32],
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 15 |     available: usize,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 16 |     size: usize,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 17 |     last: usize,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> mem-alloc/src/simple.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |         let mut idx = get_idx(size);
[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: fields `buddies`, `available`, `size`, and `last` are never read
[INFO] [stdout]   --> mem-alloc/src/simple.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct Buddy {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 14 |     buddies: [Node; 32],
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 15 |     available: usize,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 16 |     size: usize,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 17 |     last: usize,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple fields are never read
[INFO] [stdout]   --> small-cpu/src/cpu.rs:3:5
[INFO] [stdout]    |
[INFO] [stdout]  1 | pub struct Cpu {
[INFO] [stdout]    |            --- fields in this struct
[INFO] [stdout]  2 |     // registers
[INFO] [stdout]  3 |     rax: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]  4 |     rcx: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]  5 |     rdx: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]  6 |     rbx: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]  7 |     rsp: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]  8 |     rbp: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]  9 |     rsi: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 10 |     rdi: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 11 |     r8: u64,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 12 |     r9: u64,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 13 |     r10: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 14 |     r11: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 15 |     r12: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 16 |     r13: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 17 |     r14: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     rip: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     stack_ptr: u64,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 24 |     stack_limit: u64, // could be the constant
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 25 |
[INFO] [stdout] 26 |     heap_ptr: u64,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |     zf: u8,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 30 |     sf: u8,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 31 |     of: u8,
[INFO] [stdout]    |     ^^
[INFO] [stdout] ...
[INFO] [stdout] 34 |     state: ProgramState,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `mem` is never read
[INFO] [stdout]  --> small-cpu/src/memory.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Memory {
[INFO] [stdout]   |            ------ field in this struct
[INFO] [stdout] 4 |     mem: [u8; MEMORY_SIZE],
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `stack` and `stack_ptr` are never read
[INFO] [stdout]  --> small-cpu/src/stack.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Stack {
[INFO] [stdout]   |            ----- fields in this struct
[INFO] [stdout] 4 |     stack: [u8; STACK_SIZE],
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 5 |     stack_ptr: usize,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking getrandom v0.4.2
[INFO] [stderr]     Checking rand v0.10.1
[INFO] [stderr]     Checking cpu-sch v0.1.0 (/opt/rustwide/workdir/cpu-sch)
[INFO] [stdout] error: CRATER ERROR: C-variadic argument with type `NonZero<usize>`.
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/nix-0.31.3/src/sys/prctl.rs:225:97
[INFO] [stdout]     |
[INFO] [stdout] 225 |     let res = unsafe { libc::prctl(libc::PR_SET_VMA, libc::PR_SET_VMA_ANON_NAME, addr.as_ptr(), length, nameref) };
[INFO] [stdout]     |                                                                                                 ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `NonZero<usize>` does not implement `VaArgSafe`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/nix-0.31.3/src/sys/prctl.rs:225:97
[INFO] [stdout]     |
[INFO] [stdout] 225 |     let res = unsafe { libc::prctl(libc::PR_SET_VMA, libc::PR_SET_VMA_ANON_NAME, addr.as_ptr(), length, nameref) };
[INFO] [stdout]     |                                                                                                 ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: values passed as C-variadic arguments must implement `core::ffi::VaArgSafe`
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #162483 <https://github.com/rust-lang/rust/issues/162483>
[INFO] [stdout]     = note: requested on the command line with `--force-warn invalid-c-variadic-arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: CRATER ERROR: C-variadic argument with type `AtFlags`.
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/nix-0.31.3/src/unistd.rs:1240:13
[INFO] [stdout]      |
[INFO] [stdout] 1240 |             flags,
[INFO] [stdout]      |             ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `AtFlags` does not implement `VaArgSafe`
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/nix-0.31.3/src/unistd.rs:1240:13
[INFO] [stdout]      |
[INFO] [stdout] 1240 |             flags,
[INFO] [stdout]      |             ^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: values passed as C-variadic arguments must implement `core::ffi::VaArgSafe`
[INFO] [stdout]      = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]      = note: for more information, see issue #162483 <https://github.com/rust-lang/rust/issues/162483>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `nix` (lib) due to 2 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "0664f3624d19db63de0ce57787788571432d0e499eab534d3e4c2a71d4e35b46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0664f3624d19db63de0ce57787788571432d0e499eab534d3e4c2a71d4e35b46", kill_on_drop: false }`
[INFO] [stdout] 0664f3624d19db63de0ce57787788571432d0e499eab534d3e4c2a71d4e35b46
