[INFO] fetching crate abi_stable 0.8.4...
[INFO] checking abi_stable-0.8.4 against beta-2020-07-24 for pr-75494-beta
[INFO] extracting crate abi_stable 0.8.4 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate abi_stable 0.8.4 on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate abi_stable 0.8.4
[INFO] finished tweaking crates.io crate abi_stable 0.8.4
[INFO] tweaked toml for crates.io crate abi_stable 0.8.4 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b4bf85baf0da3080a1de6275dc56e2645fcebd7d8a019c0d110424d113bf1338
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b4bf85baf0da3080a1de6275dc56e2645fcebd7d8a019c0d110424d113bf1338", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b4bf85baf0da3080a1de6275dc56e2645fcebd7d8a019c0d110424d113bf1338", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4bf85baf0da3080a1de6275dc56e2645fcebd7d8a019c0d110424d113bf1338", kill_on_drop: false }`
[INFO] [stdout] b4bf85baf0da3080a1de6275dc56e2645fcebd7d8a019c0d110424d113bf1338
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5721f00877d9f43332fc4edfcafa509d674fc7466dba804de96e0cb7aa6bc018
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "5721f00877d9f43332fc4edfcafa509d674fc7466dba804de96e0cb7aa6bc018", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.38
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling serde_derive v1.0.115
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.57
[INFO] [stderr]    Compiling typed-arena v1.5.0
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling rayon v1.3.1
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking generational-arena v0.2.8
[INFO] [stderr]    Compiling core_extensions v0.1.17
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking rand_xoshiro v0.1.0
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking crossbeam-channel v0.3.9
[INFO] [stderr]     Checking criterion-plot v0.3.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking smallvec v0.6.13
[INFO] [stderr]    Compiling abi_stable_shared v0.8.0
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking parking_lot_core v0.6.2
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking rayon-core v1.7.1
[INFO] [stderr]    Compiling as_derive_utils v0.8.3
[INFO] [stderr]    Compiling abi_stable_derive v0.8.4
[INFO] [stderr]     Checking serde v1.0.115
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]     Checking bincode v1.3.1
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking tinytemplate v1.1.0
[INFO] [stderr]     Checking abi_stable v0.8.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking criterion v0.2.11
[INFO] [stdout] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/inline_storage.rs:211:13
[INFO] [stdout]     |
[INFO] [stdout] 211 |             std::mem::uninitialized()
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/inline_storage.rs:211:13
[INFO] [stdout]     |
[INFO] [stdout] 211 |             std::mem::uninitialized()
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `external_types::crossbeam_channel::errors::RRecvError`, which is not FFI-safe
[INFO] [stdout]    --> src/external_types/crossbeam_channel/extern_fns.rs:108:50
[INFO] [stdout]     |
[INFO] [stdout] 108 |     pub(super) extern "C" fn recv(this:&Self) -> RResult<T,RRecvError>{
[INFO] [stdout]     |                                                  ^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]     = help: consider adding a member to this struct
[INFO] [stdout]     = note: this struct has no fields
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]    --> src/external_types/crossbeam_channel/errors.rs:66:1
[INFO] [stdout]     |
[INFO] [stdout] 66  | pub struct RRecvError;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `()`, which is not FFI-safe
[INFO] [stdout]    --> src/external_types/parking_lot/once.rs:510:12
[INFO] [stdout]     |
[INFO] [stdout] 510 |     runner:RunClosure,
[INFO] [stdout]     |            ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a struct instead
[INFO] [stdout]     = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `()`, which is not FFI-safe
[INFO] [stdout]    --> src/external_types/parking_lot/once.rs:521:12
[INFO] [stdout]     |
[INFO] [stdout] 521 |     runner:RunClosure,
[INFO] [stdout]     |            ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a struct instead
[INFO] [stdout]     = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `()`, which is not FFI-safe
[INFO] [stdout]   --> src/library/c_abi_testing/functions.rs:51:43
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub(crate) extern "C" fn take_pair_a(pair:Tuple2<u16,()>)->u32{
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `()`, which is not FFI-safe
[INFO] [stdout]   --> src/library/c_abi_testing/functions.rs:54:43
[INFO] [stdout]    |
[INFO] [stdout] 54 | pub(crate) extern "C" fn take_pair_b(pair:Tuple2<(),u16>)->u32{
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `()`, which is not FFI-safe
[INFO] [stdout]   --> src/library/c_abi_testing/functions.rs:65:47
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub(crate) extern "C" fn take_triple_a(triple:Tuple3<(),u16,u16>)->u64{
[INFO] [stdout]    |                                               ^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `()`, which is not FFI-safe
[INFO] [stdout]   --> src/library/c_abi_testing/functions.rs:69:47
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub(crate) extern "C" fn take_triple_b(triple:Tuple3<u16,(),u16>)->u64{
[INFO] [stdout]    |                                               ^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `()`, which is not FFI-safe
[INFO] [stdout]   --> src/library/c_abi_testing/functions.rs:73:47
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub(crate) extern "C" fn take_triple_c(triple:Tuple3<u16,u16,()>)->u64{
[INFO] [stdout]    |                                               ^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `()`, which is not FFI-safe
[INFO] [stdout]    --> src/library/c_abi_testing/functions.rs:100:43
[INFO] [stdout]     |
[INFO] [stdout] 100 | pub(crate) extern "C" fn take_2_pairs_a(a:Tuple2<(),u16>,b:Tuple2<(),u16>)->u64{
[INFO] [stdout]     |                                           ^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a struct instead
[INFO] [stdout]     = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `()`, which is not FFI-safe
[INFO] [stdout]    --> src/library/c_abi_testing/functions.rs:100:60
[INFO] [stdout]     |
[INFO] [stdout] 100 | pub(crate) extern "C" fn take_2_pairs_a(a:Tuple2<(),u16>,b:Tuple2<(),u16>)->u64{
[INFO] [stdout]     |                                                            ^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a struct instead
[INFO] [stdout]     = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `()`, which is not FFI-safe
[INFO] [stdout]    --> src/library/c_abi_testing/functions.rs:104:43
[INFO] [stdout]     |
[INFO] [stdout] 104 | pub(crate) extern "C" fn take_2_pairs_b(a:Tuple2<u16,()>,b:Tuple2<u16,()>)->u64{
[INFO] [stdout]     |                                           ^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a struct instead
[INFO] [stdout]     = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `()`, which is not FFI-safe
[INFO] [stdout]    --> src/library/c_abi_testing/functions.rs:104:60
[INFO] [stdout]     |
[INFO] [stdout] 104 | pub(crate) extern "C" fn take_2_pairs_b(a:Tuple2<u16,()>,b:Tuple2<u16,()>)->u64{
[INFO] [stdout]     |                                                            ^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a struct instead
[INFO] [stdout]     = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `library::c_abi_testing::types::MyUnit`, which is not FFI-safe
[INFO] [stdout]    --> src/library/c_abi_testing/functions.rs:124:7
[INFO] [stdout]     |
[INFO] [stdout] 124 |     _:MyUnit,
[INFO] [stdout]     |       ^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a member to this struct
[INFO] [stdout]     = note: this struct has no fields
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]    --> src/library/c_abi_testing/types.rs:4:1
[INFO] [stdout]     |
[INFO] [stdout] 4   | pub(crate) struct MyUnit;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `library::c_abi_testing::types::MyUnit`, which is not FFI-safe
[INFO] [stdout]    --> src/library/c_abi_testing/functions.rs:126:7
[INFO] [stdout]     |
[INFO] [stdout] 126 |     _:MyUnit,
[INFO] [stdout]     |       ^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a member to this struct
[INFO] [stdout]     = note: this struct has no fields
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]    --> src/library/c_abi_testing/types.rs:4:1
[INFO] [stdout]     |
[INFO] [stdout] 4   | pub(crate) struct MyUnit;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `library::c_abi_testing::types::MyUnit`, which is not FFI-safe
[INFO] [stdout]    --> src/library/c_abi_testing/functions.rs:128:7
[INFO] [stdout]     |
[INFO] [stdout] 128 |     _:MyUnit,
[INFO] [stdout]     |       ^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a member to this struct
[INFO] [stdout]     = note: this struct has no fields
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]    --> src/library/c_abi_testing/types.rs:4:1
[INFO] [stdout]     |
[INFO] [stdout] 4   | pub(crate) struct MyUnit;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `marker_type::NotCopyNotClone`, which is not FFI-safe
[INFO] [stdout]   --> src/std_types/map/extern_fns.rs:58:48
[INFO] [stdout]    |
[INFO] [stdout] 58 |     pub(super)extern "C" fn get_elem(&self,key:MapQuery<'_,K>)->Option<&V>{
[INFO] [stdout]    |                                                ^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider adding a member to this struct
[INFO] [stdout]    = note: this struct has no fields
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]   --> src/marker_type.rs:51:1
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub struct NotCopyNotClone;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `marker_type::NotCopyNotClone`, which is not FFI-safe
[INFO] [stdout]   --> src/std_types/map/extern_fns.rs:64:56
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub(super)extern "C" fn get_mut_elem(&mut self,key:MapQuery<'_,K>)->Option<&mut V>{
[INFO] [stdout]    |                                                        ^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider adding a member to this struct
[INFO] [stdout]    = note: this struct has no fields
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]   --> src/marker_type.rs:51:1
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub struct NotCopyNotClone;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `marker_type::NotCopyNotClone`, which is not FFI-safe
[INFO] [stdout]   --> src/std_types/map/extern_fns.rs:70:56
[INFO] [stdout]    |
[INFO] [stdout] 70 |     pub(super)extern "C" fn remove_entry(&mut self,key:MapQuery<'_,K>)->ROption<Tuple2<K,V>>{
[INFO] [stdout]    |                                                        ^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider adding a member to this struct
[INFO] [stdout]    = note: this struct has no fields
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]   --> src/marker_type.rs:51:1
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub struct NotCopyNotClone;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `external_types::crossbeam_channel::errors::RRecvError`, which is not FFI-safe
[INFO] [stdout]    --> src/external_types/crossbeam_channel/extern_fns.rs:108:50
[INFO] [stdout]     |
[INFO] [stdout] 108 |     pub(super) extern "C" fn recv(this:&Self) -> RResult<T,RRecvError>{
[INFO] [stdout]     |                                                  ^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]     = help: consider adding a member to this struct
[INFO] [stdout]     = note: this struct has no fields
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]    --> src/external_types/crossbeam_channel/errors.rs:66:1
[INFO] [stdout]     |
[INFO] [stdout] 66  | pub struct RRecvError;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `()`, which is not FFI-safe
[INFO] [stdout]    --> src/external_types/parking_lot/once.rs:510:12
[INFO] [stdout]     |
[INFO] [stdout] 510 |     runner:RunClosure,
[INFO] [stdout]     |            ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a struct instead
[INFO] [stdout]     = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `()`, which is not FFI-safe
[INFO] [stdout]    --> src/external_types/parking_lot/once.rs:521:12
[INFO] [stdout]     |
[INFO] [stdout] 521 |     runner:RunClosure,
[INFO] [stdout]     |            ^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a struct instead
[INFO] [stdout]     = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `()`, which is not FFI-safe
[INFO] [stdout]   --> src/library/c_abi_testing/functions.rs:51:43
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub(crate) extern "C" fn take_pair_a(pair:Tuple2<u16,()>)->u32{
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `()`, which is not FFI-safe
[INFO] [stdout]   --> src/library/c_abi_testing/functions.rs:54:43
[INFO] [stdout]    |
[INFO] [stdout] 54 | pub(crate) extern "C" fn take_pair_b(pair:Tuple2<(),u16>)->u32{
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `()`, which is not FFI-safe
[INFO] [stdout]   --> src/library/c_abi_testing/functions.rs:65:47
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub(crate) extern "C" fn take_triple_a(triple:Tuple3<(),u16,u16>)->u64{
[INFO] [stdout]    |                                               ^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `()`, which is not FFI-safe
[INFO] [stdout]   --> src/library/c_abi_testing/functions.rs:69:47
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub(crate) extern "C" fn take_triple_b(triple:Tuple3<u16,(),u16>)->u64{
[INFO] [stdout]    |                                               ^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `()`, which is not FFI-safe
[INFO] [stdout]   --> src/library/c_abi_testing/functions.rs:73:47
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub(crate) extern "C" fn take_triple_c(triple:Tuple3<u16,u16,()>)->u64{
[INFO] [stdout]    |                                               ^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a struct instead
[INFO] [stdout]    = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `()`, which is not FFI-safe
[INFO] [stdout]    --> src/library/c_abi_testing/functions.rs:100:43
[INFO] [stdout]     |
[INFO] [stdout] 100 | pub(crate) extern "C" fn take_2_pairs_a(a:Tuple2<(),u16>,b:Tuple2<(),u16>)->u64{
[INFO] [stdout]     |                                           ^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a struct instead
[INFO] [stdout]     = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `()`, which is not FFI-safe
[INFO] [stdout]    --> src/library/c_abi_testing/functions.rs:100:60
[INFO] [stdout]     |
[INFO] [stdout] 100 | pub(crate) extern "C" fn take_2_pairs_a(a:Tuple2<(),u16>,b:Tuple2<(),u16>)->u64{
[INFO] [stdout]     |                                                            ^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a struct instead
[INFO] [stdout]     = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `()`, which is not FFI-safe
[INFO] [stdout]    --> src/library/c_abi_testing/functions.rs:104:43
[INFO] [stdout]     |
[INFO] [stdout] 104 | pub(crate) extern "C" fn take_2_pairs_b(a:Tuple2<u16,()>,b:Tuple2<u16,()>)->u64{
[INFO] [stdout]     |                                           ^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a struct instead
[INFO] [stdout]     = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `()`, which is not FFI-safe
[INFO] [stdout]    --> src/library/c_abi_testing/functions.rs:104:60
[INFO] [stdout]     |
[INFO] [stdout] 104 | pub(crate) extern "C" fn take_2_pairs_b(a:Tuple2<u16,()>,b:Tuple2<u16,()>)->u64{
[INFO] [stdout]     |                                                            ^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a struct instead
[INFO] [stdout]     = note: tuples have unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `library::c_abi_testing::types::MyUnit`, which is not FFI-safe
[INFO] [stdout]    --> src/library/c_abi_testing/functions.rs:124:7
[INFO] [stdout]     |
[INFO] [stdout] 124 |     _:MyUnit,
[INFO] [stdout]     |       ^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a member to this struct
[INFO] [stdout]     = note: this struct has no fields
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]    --> src/library/c_abi_testing/types.rs:4:1
[INFO] [stdout]     |
[INFO] [stdout] 4   | pub(crate) struct MyUnit;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `library::c_abi_testing::types::MyUnit`, which is not FFI-safe
[INFO] [stdout]    --> src/library/c_abi_testing/functions.rs:126:7
[INFO] [stdout]     |
[INFO] [stdout] 126 |     _:MyUnit,
[INFO] [stdout]     |       ^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a member to this struct
[INFO] [stdout]     = note: this struct has no fields
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]    --> src/library/c_abi_testing/types.rs:4:1
[INFO] [stdout]     |
[INFO] [stdout] 4   | pub(crate) struct MyUnit;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `library::c_abi_testing::types::MyUnit`, which is not FFI-safe
[INFO] [stdout]    --> src/library/c_abi_testing/functions.rs:128:7
[INFO] [stdout]     |
[INFO] [stdout] 128 |     _:MyUnit,
[INFO] [stdout]     |       ^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a member to this struct
[INFO] [stdout]     = note: this struct has no fields
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]    --> src/library/c_abi_testing/types.rs:4:1
[INFO] [stdout]     |
[INFO] [stdout] 4   | pub(crate) struct MyUnit;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `marker_type::NotCopyNotClone`, which is not FFI-safe
[INFO] [stdout]   --> src/std_types/map/extern_fns.rs:58:48
[INFO] [stdout]    |
[INFO] [stdout] 58 |     pub(super)extern "C" fn get_elem(&self,key:MapQuery<'_,K>)->Option<&V>{
[INFO] [stdout]    |                                                ^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider adding a member to this struct
[INFO] [stdout]    = note: this struct has no fields
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]   --> src/marker_type.rs:51:1
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub struct NotCopyNotClone;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `marker_type::NotCopyNotClone`, which is not FFI-safe
[INFO] [stdout]   --> src/std_types/map/extern_fns.rs:64:56
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub(super)extern "C" fn get_mut_elem(&mut self,key:MapQuery<'_,K>)->Option<&mut V>{
[INFO] [stdout]    |                                                        ^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider adding a member to this struct
[INFO] [stdout]    = note: this struct has no fields
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]   --> src/marker_type.rs:51:1
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub struct NotCopyNotClone;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `marker_type::NotCopyNotClone`, which is not FFI-safe
[INFO] [stdout]   --> src/std_types/map/extern_fns.rs:70:56
[INFO] [stdout]    |
[INFO] [stdout] 70 |     pub(super)extern "C" fn remove_entry(&mut self,key:MapQuery<'_,K>)->ROption<Tuple2<K,V>>{
[INFO] [stdout]    |                                                        ^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider adding a member to this struct
[INFO] [stdout]    = note: this struct has no fields
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]   --> src/marker_type.rs:51:1
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub struct NotCopyNotClone;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 42s
[INFO] running `Command { std: "docker" "inspect" "5721f00877d9f43332fc4edfcafa509d674fc7466dba804de96e0cb7aa6bc018", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5721f00877d9f43332fc4edfcafa509d674fc7466dba804de96e0cb7aa6bc018", kill_on_drop: false }`
[INFO] [stdout] 5721f00877d9f43332fc4edfcafa509d674fc7466dba804de96e0cb7aa6bc018
