[INFO] fetching crate consistenttime 0.2.0...
[INFO] checking consistenttime-0.2.0 against master#8007b506ac5da629f223b755f5a5391edd5f6d01 for pr-88041
[INFO] extracting crate consistenttime 0.2.0 into /workspace/builds/worker-56/source
[INFO] validating manifest of crates.io crate consistenttime 0.2.0 on toolchain 8007b506ac5da629f223b755f5a5391edd5f6d01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate consistenttime 0.2.0
[INFO] finished tweaking crates.io crate consistenttime 0.2.0
[INFO] tweaked toml for crates.io crate consistenttime 0.2.0 written to /workspace/builds/worker-56/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a1f4e1e08d9553ab5adf635a0fd44dbf57a348676af4039a9ea51ff03bdb7607
[INFO] running `Command { std: "docker" "start" "-a" "a1f4e1e08d9553ab5adf635a0fd44dbf57a348676af4039a9ea51ff03bdb7607", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a1f4e1e08d9553ab5adf635a0fd44dbf57a348676af4039a9ea51ff03bdb7607", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1f4e1e08d9553ab5adf635a0fd44dbf57a348676af4039a9ea51ff03bdb7607", kill_on_drop: false }`
[INFO] [stdout] a1f4e1e08d9553ab5adf635a0fd44dbf57a348676af4039a9ea51ff03bdb7607
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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" "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" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e292592e2bb8e5bd70a67b5b3577538de2cc70107bedf62310ced8146a2c85a6
[INFO] running `Command { std: "docker" "start" "-a" "e292592e2bb8e5bd70a67b5b3577538de2cc70107bedf62310ced8146a2c85a6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking consistenttime v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `extern` fn uses type `[u8]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:199:37
[INFO] [stdout]     |
[INFO] [stdout] 199 |           pub extern "C" fn $name( x: &[$code], y: &[$code]) -> bool {
[INFO] [stdout]     |                                       ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 225 | / ct_eq_slice_gen!(ct_u8_slice_eq,ct_u8_eq,u8;;
[INFO] [stdout] 226 | |     test_ct_u8_slice_eq, MAX_U8);
[INFO] [stdout]     | |_________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_eq_slice_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u8]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:199:50
[INFO] [stdout]     |
[INFO] [stdout] 199 |           pub extern "C" fn $name( x: &[$code], y: &[$code]) -> bool {
[INFO] [stdout]     |                                                    ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 225 | / ct_eq_slice_gen!(ct_u8_slice_eq,ct_u8_eq,u8;;
[INFO] [stdout] 226 | |     test_ct_u8_slice_eq, MAX_U8);
[INFO] [stdout]     | |_________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_eq_slice_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u16]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:199:37
[INFO] [stdout]     |
[INFO] [stdout] 199 |           pub extern "C" fn $name( x: &[$code], y: &[$code]) -> bool {
[INFO] [stdout]     |                                       ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 227 | / ct_eq_slice_gen!(ct_u16_slice_eq,ct_u16_eq,u16;;
[INFO] [stdout] 228 | |     test_ct_u16_slice_eq, MAX_U16);
[INFO] [stdout]     | |___________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_eq_slice_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u16]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:199:50
[INFO] [stdout]     |
[INFO] [stdout] 199 |           pub extern "C" fn $name( x: &[$code], y: &[$code]) -> bool {
[INFO] [stdout]     |                                                    ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 227 | / ct_eq_slice_gen!(ct_u16_slice_eq,ct_u16_eq,u16;;
[INFO] [stdout] 228 | |     test_ct_u16_slice_eq, MAX_U16);
[INFO] [stdout]     | |___________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_eq_slice_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u32]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:199:37
[INFO] [stdout]     |
[INFO] [stdout] 199 |           pub extern "C" fn $name( x: &[$code], y: &[$code]) -> bool {
[INFO] [stdout]     |                                       ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 229 | / ct_eq_slice_gen!(ct_u32_slice_eq,ct_u32_eq,u32;;
[INFO] [stdout] 230 | |     test_ct_u32_slice_eq, MAX_U32);
[INFO] [stdout]     | |___________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_eq_slice_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u32]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:199:50
[INFO] [stdout]     |
[INFO] [stdout] 199 |           pub extern "C" fn $name( x: &[$code], y: &[$code]) -> bool {
[INFO] [stdout]     |                                                    ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 229 | / ct_eq_slice_gen!(ct_u32_slice_eq,ct_u32_eq,u32;;
[INFO] [stdout] 230 | |     test_ct_u32_slice_eq, MAX_U32);
[INFO] [stdout]     | |___________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_eq_slice_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u64]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:199:37
[INFO] [stdout]     |
[INFO] [stdout] 199 |           pub extern "C" fn $name( x: &[$code], y: &[$code]) -> bool {
[INFO] [stdout]     |                                       ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 231 | / ct_eq_slice_gen!(ct_u64_slice_eq,ct_u64_eq,u64;;
[INFO] [stdout] 232 | |     test_ct_u64_slice_eq, MAX_U64);
[INFO] [stdout]     | |___________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_eq_slice_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u64]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:199:50
[INFO] [stdout]     |
[INFO] [stdout] 199 |           pub extern "C" fn $name( x: &[$code], y: &[$code]) -> bool {
[INFO] [stdout]     |                                                    ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 231 | / ct_eq_slice_gen!(ct_u64_slice_eq,ct_u64_eq,u64;;
[INFO] [stdout] 232 | |     test_ct_u64_slice_eq, MAX_U64);
[INFO] [stdout]     | |___________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_eq_slice_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[usize]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:199:37
[INFO] [stdout]     |
[INFO] [stdout] 199 |           pub extern "C" fn $name( x: &[$code], y: &[$code]) -> bool {
[INFO] [stdout]     |                                       ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 233 | / ct_eq_slice_gen!(ct_usize_slice_eq,ct_usize_eq,usize;;
[INFO] [stdout] 234 | |     test_ct_usize_slice_eq, MAX_USIZE);
[INFO] [stdout]     | |_______________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_eq_slice_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[usize]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:199:50
[INFO] [stdout]     |
[INFO] [stdout] 199 |           pub extern "C" fn $name( x: &[$code], y: &[$code]) -> bool {
[INFO] [stdout]     |                                                    ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 233 | / ct_eq_slice_gen!(ct_usize_slice_eq,ct_usize_eq,usize;;
[INFO] [stdout] 234 | |     test_ct_usize_slice_eq, MAX_USIZE);
[INFO] [stdout]     | |_______________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_eq_slice_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u8]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:303:48
[INFO] [stdout]     |
[INFO] [stdout] 303 |           pub extern "C" fn $name(flag: bool, x: &mut [$code], y: &[$code]) {
[INFO] [stdout]     |                                                  ^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 338 | / ct_constant_copy_gen!(ct_copy_u8,MAX_U8,u8,ct_select_u8;;
[INFO] [stdout] 339 | |     test_ct_copy_u8,ct_u8_slice_eq,test_ct_copy_u8_panic);
[INFO] [stdout]     | |__________________________________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_constant_copy_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u8]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:303:65
[INFO] [stdout]     |
[INFO] [stdout] 303 |           pub extern "C" fn $name(flag: bool, x: &mut [$code], y: &[$code]) {
[INFO] [stdout]     |                                                                   ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 338 | / ct_constant_copy_gen!(ct_copy_u8,MAX_U8,u8,ct_select_u8;;
[INFO] [stdout] 339 | |     test_ct_copy_u8,ct_u8_slice_eq,test_ct_copy_u8_panic);
[INFO] [stdout]     | |__________________________________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_constant_copy_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u16]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:303:48
[INFO] [stdout]     |
[INFO] [stdout] 303 |           pub extern "C" fn $name(flag: bool, x: &mut [$code], y: &[$code]) {
[INFO] [stdout]     |                                                  ^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 340 | / ct_constant_copy_gen!(ct_copy_u16,MAX_U16,u16,ct_select_u16;;
[INFO] [stdout] 341 | |     test_ct_copy_u16,ct_u16_slice_eq,test_ct_copy_u16_panic);
[INFO] [stdout]     | |_____________________________________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_constant_copy_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u16]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:303:65
[INFO] [stdout]     |
[INFO] [stdout] 303 |           pub extern "C" fn $name(flag: bool, x: &mut [$code], y: &[$code]) {
[INFO] [stdout]     |                                                                   ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 340 | / ct_constant_copy_gen!(ct_copy_u16,MAX_U16,u16,ct_select_u16;;
[INFO] [stdout] 341 | |     test_ct_copy_u16,ct_u16_slice_eq,test_ct_copy_u16_panic);
[INFO] [stdout]     | |_____________________________________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_constant_copy_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u32]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:303:48
[INFO] [stdout]     |
[INFO] [stdout] 303 |           pub extern "C" fn $name(flag: bool, x: &mut [$code], y: &[$code]) {
[INFO] [stdout]     |                                                  ^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 342 | / ct_constant_copy_gen!(ct_copy_u32,MAX_U32,u32,ct_select_u32;;
[INFO] [stdout] 343 | |     test_ct_copy_u32,ct_u32_slice_eq,test_ct_copy_u32_panic);
[INFO] [stdout]     | |_____________________________________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_constant_copy_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u32]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:303:65
[INFO] [stdout]     |
[INFO] [stdout] 303 |           pub extern "C" fn $name(flag: bool, x: &mut [$code], y: &[$code]) {
[INFO] [stdout]     |                                                                   ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 342 | / ct_constant_copy_gen!(ct_copy_u32,MAX_U32,u32,ct_select_u32;;
[INFO] [stdout] 343 | |     test_ct_copy_u32,ct_u32_slice_eq,test_ct_copy_u32_panic);
[INFO] [stdout]     | |_____________________________________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_constant_copy_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u64]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:303:48
[INFO] [stdout]     |
[INFO] [stdout] 303 |           pub extern "C" fn $name(flag: bool, x: &mut [$code], y: &[$code]) {
[INFO] [stdout]     |                                                  ^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 344 | / ct_constant_copy_gen!(ct_copy_u64,MAX_U64,u64,ct_select_u64;;
[INFO] [stdout] 345 | |     test_ct_copy_u64,ct_u64_slice_eq,test_ct_copy_u64_panic);
[INFO] [stdout]     | |_____________________________________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_constant_copy_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u64]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:303:65
[INFO] [stdout]     |
[INFO] [stdout] 303 |           pub extern "C" fn $name(flag: bool, x: &mut [$code], y: &[$code]) {
[INFO] [stdout]     |                                                                   ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 344 | / ct_constant_copy_gen!(ct_copy_u64,MAX_U64,u64,ct_select_u64;;
[INFO] [stdout] 345 | |     test_ct_copy_u64,ct_u64_slice_eq,test_ct_copy_u64_panic);
[INFO] [stdout]     | |_____________________________________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_constant_copy_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[usize]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:303:48
[INFO] [stdout]     |
[INFO] [stdout] 303 |           pub extern "C" fn $name(flag: bool, x: &mut [$code], y: &[$code]) {
[INFO] [stdout]     |                                                  ^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 346 | / ct_constant_copy_gen!(ct_copy_usize,MAX_USIZE,usize,ct_select_usize;;
[INFO] [stdout] 347 | |     test_ct_copy_usize,ct_usize_slice_eq,test_ct_copy_usize_panic);
[INFO] [stdout]     | |___________________________________________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_constant_copy_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[usize]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:303:65
[INFO] [stdout]     |
[INFO] [stdout] 303 |           pub extern "C" fn $name(flag: bool, x: &mut [$code], y: &[$code]) {
[INFO] [stdout]     |                                                                   ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 346 | / ct_constant_copy_gen!(ct_copy_usize,MAX_USIZE,usize,ct_select_usize;;
[INFO] [stdout] 347 | |     test_ct_copy_usize,ct_usize_slice_eq,test_ct_copy_usize_panic);
[INFO] [stdout]     | |___________________________________________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_constant_copy_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 20 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u8]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:199:37
[INFO] [stdout]     |
[INFO] [stdout] 199 |           pub extern "C" fn $name( x: &[$code], y: &[$code]) -> bool {
[INFO] [stdout]     |                                       ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 225 | / ct_eq_slice_gen!(ct_u8_slice_eq,ct_u8_eq,u8;;
[INFO] [stdout] 226 | |     test_ct_u8_slice_eq, MAX_U8);
[INFO] [stdout]     | |_________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_eq_slice_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u8]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:199:50
[INFO] [stdout]     |
[INFO] [stdout] 199 |           pub extern "C" fn $name( x: &[$code], y: &[$code]) -> bool {
[INFO] [stdout]     |                                                    ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 225 | / ct_eq_slice_gen!(ct_u8_slice_eq,ct_u8_eq,u8;;
[INFO] [stdout] 226 | |     test_ct_u8_slice_eq, MAX_U8);
[INFO] [stdout]     | |_________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_eq_slice_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u16]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:199:37
[INFO] [stdout]     |
[INFO] [stdout] 199 |           pub extern "C" fn $name( x: &[$code], y: &[$code]) -> bool {
[INFO] [stdout]     |                                       ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 227 | / ct_eq_slice_gen!(ct_u16_slice_eq,ct_u16_eq,u16;;
[INFO] [stdout] 228 | |     test_ct_u16_slice_eq, MAX_U16);
[INFO] [stdout]     | |___________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_eq_slice_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u16]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:199:50
[INFO] [stdout]     |
[INFO] [stdout] 199 |           pub extern "C" fn $name( x: &[$code], y: &[$code]) -> bool {
[INFO] [stdout]     |                                                    ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 227 | / ct_eq_slice_gen!(ct_u16_slice_eq,ct_u16_eq,u16;;
[INFO] [stdout] 228 | |     test_ct_u16_slice_eq, MAX_U16);
[INFO] [stdout]     | |___________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_eq_slice_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u32]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:199:37
[INFO] [stdout]     |
[INFO] [stdout] 199 |           pub extern "C" fn $name( x: &[$code], y: &[$code]) -> bool {
[INFO] [stdout]     |                                       ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 229 | / ct_eq_slice_gen!(ct_u32_slice_eq,ct_u32_eq,u32;;
[INFO] [stdout] 230 | |     test_ct_u32_slice_eq, MAX_U32);
[INFO] [stdout]     | |___________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_eq_slice_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u32]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:199:50
[INFO] [stdout]     |
[INFO] [stdout] 199 |           pub extern "C" fn $name( x: &[$code], y: &[$code]) -> bool {
[INFO] [stdout]     |                                                    ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 229 | / ct_eq_slice_gen!(ct_u32_slice_eq,ct_u32_eq,u32;;
[INFO] [stdout] 230 | |     test_ct_u32_slice_eq, MAX_U32);
[INFO] [stdout]     | |___________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_eq_slice_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u64]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:199:37
[INFO] [stdout]     |
[INFO] [stdout] 199 |           pub extern "C" fn $name( x: &[$code], y: &[$code]) -> bool {
[INFO] [stdout]     |                                       ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 231 | / ct_eq_slice_gen!(ct_u64_slice_eq,ct_u64_eq,u64;;
[INFO] [stdout] 232 | |     test_ct_u64_slice_eq, MAX_U64);
[INFO] [stdout]     | |___________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_eq_slice_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u64]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:199:50
[INFO] [stdout]     |
[INFO] [stdout] 199 |           pub extern "C" fn $name( x: &[$code], y: &[$code]) -> bool {
[INFO] [stdout]     |                                                    ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 231 | / ct_eq_slice_gen!(ct_u64_slice_eq,ct_u64_eq,u64;;
[INFO] [stdout] 232 | |     test_ct_u64_slice_eq, MAX_U64);
[INFO] [stdout]     | |___________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_eq_slice_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[usize]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:199:37
[INFO] [stdout]     |
[INFO] [stdout] 199 |           pub extern "C" fn $name( x: &[$code], y: &[$code]) -> bool {
[INFO] [stdout]     |                                       ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 233 | / ct_eq_slice_gen!(ct_usize_slice_eq,ct_usize_eq,usize;;
[INFO] [stdout] 234 | |     test_ct_usize_slice_eq, MAX_USIZE);
[INFO] [stdout]     | |_______________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_eq_slice_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[usize]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:199:50
[INFO] [stdout]     |
[INFO] [stdout] 199 |           pub extern "C" fn $name( x: &[$code], y: &[$code]) -> bool {
[INFO] [stdout]     |                                                    ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 233 | / ct_eq_slice_gen!(ct_usize_slice_eq,ct_usize_eq,usize;;
[INFO] [stdout] 234 | |     test_ct_usize_slice_eq, MAX_USIZE);
[INFO] [stdout]     | |_______________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_eq_slice_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u8]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:303:48
[INFO] [stdout]     |
[INFO] [stdout] 303 |           pub extern "C" fn $name(flag: bool, x: &mut [$code], y: &[$code]) {
[INFO] [stdout]     |                                                  ^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 338 | / ct_constant_copy_gen!(ct_copy_u8,MAX_U8,u8,ct_select_u8;;
[INFO] [stdout] 339 | |     test_ct_copy_u8,ct_u8_slice_eq,test_ct_copy_u8_panic);
[INFO] [stdout]     | |__________________________________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_constant_copy_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u8]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:303:65
[INFO] [stdout]     |
[INFO] [stdout] 303 |           pub extern "C" fn $name(flag: bool, x: &mut [$code], y: &[$code]) {
[INFO] [stdout]     |                                                                   ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 338 | / ct_constant_copy_gen!(ct_copy_u8,MAX_U8,u8,ct_select_u8;;
[INFO] [stdout] 339 | |     test_ct_copy_u8,ct_u8_slice_eq,test_ct_copy_u8_panic);
[INFO] [stdout]     | |__________________________________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_constant_copy_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u16]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:303:48
[INFO] [stdout]     |
[INFO] [stdout] 303 |           pub extern "C" fn $name(flag: bool, x: &mut [$code], y: &[$code]) {
[INFO] [stdout]     |                                                  ^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 340 | / ct_constant_copy_gen!(ct_copy_u16,MAX_U16,u16,ct_select_u16;;
[INFO] [stdout] 341 | |     test_ct_copy_u16,ct_u16_slice_eq,test_ct_copy_u16_panic);
[INFO] [stdout]     | |_____________________________________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_constant_copy_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u16]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:303:65
[INFO] [stdout]     |
[INFO] [stdout] 303 |           pub extern "C" fn $name(flag: bool, x: &mut [$code], y: &[$code]) {
[INFO] [stdout]     |                                                                   ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 340 | / ct_constant_copy_gen!(ct_copy_u16,MAX_U16,u16,ct_select_u16;;
[INFO] [stdout] 341 | |     test_ct_copy_u16,ct_u16_slice_eq,test_ct_copy_u16_panic);
[INFO] [stdout]     | |_____________________________________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_constant_copy_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u32]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:303:48
[INFO] [stdout]     |
[INFO] [stdout] 303 |           pub extern "C" fn $name(flag: bool, x: &mut [$code], y: &[$code]) {
[INFO] [stdout]     |                                                  ^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 342 | / ct_constant_copy_gen!(ct_copy_u32,MAX_U32,u32,ct_select_u32;;
[INFO] [stdout] 343 | |     test_ct_copy_u32,ct_u32_slice_eq,test_ct_copy_u32_panic);
[INFO] [stdout]     | |_____________________________________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_constant_copy_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u32]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:303:65
[INFO] [stdout]     |
[INFO] [stdout] 303 |           pub extern "C" fn $name(flag: bool, x: &mut [$code], y: &[$code]) {
[INFO] [stdout]     |                                                                   ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 342 | / ct_constant_copy_gen!(ct_copy_u32,MAX_U32,u32,ct_select_u32;;
[INFO] [stdout] 343 | |     test_ct_copy_u32,ct_u32_slice_eq,test_ct_copy_u32_panic);
[INFO] [stdout]     | |_____________________________________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_constant_copy_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u64]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:303:48
[INFO] [stdout]     |
[INFO] [stdout] 303 |           pub extern "C" fn $name(flag: bool, x: &mut [$code], y: &[$code]) {
[INFO] [stdout]     |                                                  ^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 344 | / ct_constant_copy_gen!(ct_copy_u64,MAX_U64,u64,ct_select_u64;;
[INFO] [stdout] 345 | |     test_ct_copy_u64,ct_u64_slice_eq,test_ct_copy_u64_panic);
[INFO] [stdout]     | |_____________________________________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_constant_copy_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u64]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:303:65
[INFO] [stdout]     |
[INFO] [stdout] 303 |           pub extern "C" fn $name(flag: bool, x: &mut [$code], y: &[$code]) {
[INFO] [stdout]     |                                                                   ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 344 | / ct_constant_copy_gen!(ct_copy_u64,MAX_U64,u64,ct_select_u64;;
[INFO] [stdout] 345 | |     test_ct_copy_u64,ct_u64_slice_eq,test_ct_copy_u64_panic);
[INFO] [stdout]     | |_____________________________________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_constant_copy_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[usize]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:303:48
[INFO] [stdout]     |
[INFO] [stdout] 303 |           pub extern "C" fn $name(flag: bool, x: &mut [$code], y: &[$code]) {
[INFO] [stdout]     |                                                  ^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 346 | / ct_constant_copy_gen!(ct_copy_usize,MAX_USIZE,usize,ct_select_usize;;
[INFO] [stdout] 347 | |     test_ct_copy_usize,ct_usize_slice_eq,test_ct_copy_usize_panic);
[INFO] [stdout]     | |___________________________________________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_constant_copy_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[usize]`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:303:65
[INFO] [stdout]     |
[INFO] [stdout] 303 |           pub extern "C" fn $name(flag: bool, x: &mut [$code], y: &[$code]) {
[INFO] [stdout]     |                                                                   ^^^^^^^^ not FFI-safe
[INFO] [stdout] ...
[INFO] [stdout] 346 | / ct_constant_copy_gen!(ct_copy_usize,MAX_USIZE,usize,ct_select_usize;;
[INFO] [stdout] 347 | |     test_ct_copy_usize,ct_usize_slice_eq,test_ct_copy_usize_panic);
[INFO] [stdout]     | |___________________________________________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a raw pointer instead
[INFO] [stdout]     = note: slices have no C equivalent
[INFO] [stdout]     = note: this warning originates in the macro `ct_constant_copy_gen` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 20 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.05s
[INFO] running `Command { std: "docker" "inspect" "e292592e2bb8e5bd70a67b5b3577538de2cc70107bedf62310ced8146a2c85a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e292592e2bb8e5bd70a67b5b3577538de2cc70107bedf62310ced8146a2c85a6", kill_on_drop: false }`
[INFO] [stdout] e292592e2bb8e5bd70a67b5b3577538de2cc70107bedf62310ced8146a2c85a6