[INFO] cloning repository https://github.com/jazz-lang/Jazz-jit
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jazz-lang/Jazz-jit" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjazz-lang%2FJazz-jit", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjazz-lang%2FJazz-jit'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e88a8babeeefa89d6e903e8e96bc7da7b9be4a20
[INFO] testing jazz-lang/Jazz-jit against 1.54.0 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjazz-lang%2FJazz-jit" "/workspace/builds/worker-67/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-67/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jazz-lang/Jazz-jit on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jazz-lang/Jazz-jit
[INFO] finished tweaking git repo https://github.com/jazz-lang/Jazz-jit
[INFO] tweaked toml for git repo https://github.com/jazz-lang/Jazz-jit written to /workspace/builds/worker-67/source/Cargo.toml
[INFO] crate git repo https://github.com/jazz-lang/Jazz-jit already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cbindgen v0.20.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5ad4b5d41063f6c8d9ae0d6784c9d360804ea7ddfbf0feb7ebbc2651cafc727a
[INFO] running `Command { std: "docker" "start" "-a" "5ad4b5d41063f6c8d9ae0d6784c9d360804ea7ddfbf0feb7ebbc2651cafc727a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5ad4b5d41063f6c8d9ae0d6784c9d360804ea7ddfbf0feb7ebbc2651cafc727a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ad4b5d41063f6c8d9ae0d6784c9d360804ea7ddfbf0feb7ebbc2651cafc727a", kill_on_drop: false }`
[INFO] [stdout] 5ad4b5d41063f6c8d9ae0d6784c9d360804ea7ddfbf0feb7ebbc2651cafc727a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7dc7f156d1835215c65fd5052ca10af50a9a1195f93a10b947ff9723e3aa7521
[INFO] running `Command { std: "docker" "start" "-a" "7dc7f156d1835215c65fd5052ca10af50a9a1195f93a10b947ff9723e3aa7521", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling itoa v0.4.7
[INFO] [stderr]    Compiling cc v1.0.28
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling cbindgen v0.20.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling capstone-sys v0.10.0
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling paste-impl v0.1.18
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling paste v0.1.18
[INFO] [stderr]    Compiling tempfile v3.2.0
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling jazz-jit v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling capstone v0.6.0
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/avx.rs:241:5
[INFO] [stdout]     |
[INFO] [stdout] 241 |     (0x4 << 4 | w << 3 | r << 2 | x << 1 | b)
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/dseg.rs:71:58
[INFO] [stdout]    |
[INFO] [stdout] 71 |                     Value::Ptr(v) => *(entry_ptr as *mut (*const u8)) = v,
[INFO] [stdout]    |                                                          ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]   --> src/lib.rs:65:46
[INFO] [stdout]    |
[INFO] [stdout] 65 |         let mut content: *mut libc::c_void = mem::uninitialized();
[INFO] [stdout]    |                                              ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: attribute should be applied to a function or static
[INFO] [stdout]     --> src/assembler_x64.rs:2531:1
[INFO] [stdout]      |
[INFO] [stdout] 2531 | #[no_mangle]
[INFO] [stdout]      | ^^^^^^^^^^^^
[INFO] [stdout] 2532 | use crate::avx::*;
[INFO] [stdout]      | ------------------ not a function or static
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_attributes)]` on by default
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<u8>`, which is not FFI-safe
[INFO] [stdout]   --> src/assembler.rs:52:32
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub extern "C" fn new() -> Assembler {
[INFO] [stdout]    |                                ^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]    = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]    = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<dseg::Entry>`, which is not FFI-safe
[INFO] [stdout]   --> src/dseg.rs:46:32
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub extern "C" fn new() -> DSeg {
[INFO] [stdout]    |                                ^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]    = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<T>`, which is not FFI-safe
[INFO] [stdout]  --> src/utils/mod.rs:1:52
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub extern "C" fn copy_vec<T: Copy>(v: &Vec<T>) -> Vec<T> {
[INFO] [stdout]   |                                                    ^^^^^^ not FFI-safe
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]   = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 51.82s
[INFO] running `Command { std: "docker" "inspect" "7dc7f156d1835215c65fd5052ca10af50a9a1195f93a10b947ff9723e3aa7521", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7dc7f156d1835215c65fd5052ca10af50a9a1195f93a10b947ff9723e3aa7521", kill_on_drop: false }`
[INFO] [stdout] 7dc7f156d1835215c65fd5052ca10af50a9a1195f93a10b947ff9723e3aa7521
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5ffefbcb14bb0804525e9264594f9f390fbf01d8c3b5b81161bda27a38bcf087
[INFO] running `Command { std: "docker" "start" "-a" "5ffefbcb14bb0804525e9264594f9f390fbf01d8c3b5b81161bda27a38bcf087", kill_on_drop: false }`
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/avx.rs:241:5
[INFO] [stdout]     |
[INFO] [stdout] 241 |     (0x4 << 4 | w << 3 | r << 2 | x << 1 | b)
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/dseg.rs:71:58
[INFO] [stdout]    |
[INFO] [stdout] 71 |                     Value::Ptr(v) => *(entry_ptr as *mut (*const u8)) = v,
[INFO] [stdout]    |                                                          ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]   --> src/lib.rs:65:46
[INFO] [stdout]    |
[INFO] [stdout] 65 |         let mut content: *mut libc::c_void = mem::uninitialized();
[INFO] [stdout]    |                                              ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: attribute should be applied to a function or static
[INFO] [stdout]     --> src/assembler_x64.rs:2531:1
[INFO] [stdout]      |
[INFO] [stdout] 2531 | #[no_mangle]
[INFO] [stdout]      | ^^^^^^^^^^^^
[INFO] [stdout] 2532 | use crate::avx::*;
[INFO] [stdout]      | ------------------ not a function or static
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_attributes)]` on by default
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<u8>`, which is not FFI-safe
[INFO] [stdout]   --> src/assembler.rs:52:32
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub extern "C" fn new() -> Assembler {
[INFO] [stdout]    |                                ^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]    = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]    = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<dseg::Entry>`, which is not FFI-safe
[INFO] [stdout]   --> src/dseg.rs:46:32
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub extern "C" fn new() -> DSeg {
[INFO] [stdout]    |                                ^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]    = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<T>`, which is not FFI-safe
[INFO] [stdout]  --> src/utils/mod.rs:1:52
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub extern "C" fn copy_vec<T: Copy>(v: &Vec<T>) -> Vec<T> {
[INFO] [stdout]   |                                                    ^^^^^^ not FFI-safe
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]   = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling jazz-jit v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> examples/float4.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(repr_simd)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `jazz_jit::avx::*`
[INFO] [stdout]  --> examples/float4.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use jazz_jit::avx::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `jazz_jit::MachineMode::Float32`
[INFO] [stdout]   --> examples/float4.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use jazz_jit::MachineMode::Float32;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `jazz-jit`
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> examples/call.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let mut cs = Capstone::new().x86()
[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] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> examples/int_add.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let mut cs = Capstone::new().x86()
[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: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/avx.rs:241:5
[INFO] [stdout]     |
[INFO] [stdout] 241 |     (0x4 << 4 | w << 3 | r << 2 | x << 1 | b)
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/dseg.rs:71:58
[INFO] [stdout]    |
[INFO] [stdout] 71 |                     Value::Ptr(v) => *(entry_ptr as *mut (*const u8)) = v,
[INFO] [stdout]    |                                                          ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]   --> src/lib.rs:65:46
[INFO] [stdout]    |
[INFO] [stdout] 65 |         let mut content: *mut libc::c_void = mem::uninitialized();
[INFO] [stdout]    |                                              ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: attribute should be applied to a function or static
[INFO] [stdout]     --> src/assembler_x64.rs:2531:1
[INFO] [stdout]      |
[INFO] [stdout] 2531 | #[no_mangle]
[INFO] [stdout]      | ^^^^^^^^^^^^
[INFO] [stdout] 2532 | use crate::avx::*;
[INFO] [stdout]      | ------------------ not a function or static
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_attributes)]` on by default
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<u8>`, which is not FFI-safe
[INFO] [stdout]   --> src/assembler.rs:52:32
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub extern "C" fn new() -> Assembler {
[INFO] [stdout]    |                                ^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]    = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]    = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<dseg::Entry>`, which is not FFI-safe
[INFO] [stdout]   --> src/dseg.rs:46:32
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub extern "C" fn new() -> DSeg {
[INFO] [stdout]    |                                ^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]    = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<T>`, which is not FFI-safe
[INFO] [stdout]  --> src/utils/mod.rs:1:52
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub extern "C" fn copy_vec<T: Copy>(v: &Vec<T>) -> Vec<T> {
[INFO] [stdout]   |                                                    ^^^^^^ not FFI-safe
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]   = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "5ffefbcb14bb0804525e9264594f9f390fbf01d8c3b5b81161bda27a38bcf087", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ffefbcb14bb0804525e9264594f9f390fbf01d8c3b5b81161bda27a38bcf087", kill_on_drop: false }`
[INFO] [stdout] 5ffefbcb14bb0804525e9264594f9f390fbf01d8c3b5b81161bda27a38bcf087
