[INFO] fetching crate socket 0.0.7...
[INFO] building socket-0.0.7 against master#ad85bc524b1ad696e42061ad8338d382dffbdbe5 for pr-146237-1
[INFO] extracting crate socket 0.0.7 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate socket 0.0.7
[INFO] finished tweaking crates.io crate socket 0.0.7
[INFO] tweaked toml for crates.io crate socket 0.0.7 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate socket 0.0.7 on toolchain ad85bc524b1ad696e42061ad8338d382dffbdbe5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 9 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c5404d9d4e0af53c20f0875c3364a02ee967dcafb6c78118a2aa2aebe7986b21
[INFO] running `Command { std: "docker" "start" "-a" "c5404d9d4e0af53c20f0875c3364a02ee967dcafb6c78118a2aa2aebe7986b21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c5404d9d4e0af53c20f0875c3364a02ee967dcafb6c78118a2aa2aebe7986b21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5404d9d4e0af53c20f0875c3364a02ee967dcafb6c78118a2aa2aebe7986b21", kill_on_drop: false }`
[INFO] [stdout] c5404d9d4e0af53c20f0875c3364a02ee967dcafb6c78118a2aa2aebe7986b21
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 39d1f60df5079897667f6eb8d2c0473750c9141791c7a315f673a85be59faf32
[INFO] running `Command { std: "docker" "start" "-a" "39d1f60df5079897667f6eb8d2c0473750c9141791c7a315f673a85be59faf32", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling num-complex v0.4.6
[INFO] [stderr]    Compiling num-bigint v0.4.6
[INFO] [stderr]    Compiling num-iter v0.1.45
[INFO] [stderr]    Compiling num-rational v0.4.2
[INFO] [stderr]    Compiling num v0.4.3
[INFO] [stderr]    Compiling socket v0.0.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `extern` declarations without an explicit ABI are deprecated
[INFO] [stdout]   --> src/lib.rs:47:1
[INFO] [stdout]    |
[INFO] [stdout] 47 | extern {
[INFO] [stdout]    | ^^^^^^ help: explicitly specify the "C" ABI: `extern "C"`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(missing_abi)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:95:62
[INFO] [stdout]    |
[INFO] [stdout] 95 |     let addresses: Vec<SocketAddr> = FromIterator::from_iter(try!(address.to_socket_addrs()));
[INFO] [stdout]    |                                                              ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:113:32
[INFO] [stdout]     |
[INFO] [stdout] 113 |     Ok(socketaddr_to_sockaddr(&try!(tosocketaddrs_to_socketaddr(address))))
[INFO] [stdout]     |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:140:18
[INFO] [stdout]     |
[INFO] [stdout] 140 |         let sa = try!(tosocketaddrs_to_sockaddr(address));
[INFO] [stdout]     |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:157:18
[INFO] [stdout]     |
[INFO] [stdout] 157 |         let sa = try!(tosocketaddrs_to_sockaddr(address));
[INFO] [stdout]     |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:179:39
[INFO] [stdout]     |
[INFO] [stdout] 179 |         let (socket_addr, received) = try!(self.recvfrom_into(&mut a[..], flags));
[INFO] [stdout]     |                                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:204:24
[INFO] [stdout]     |
[INFO] [stdout] 204 |         let received = try!(self.recv_into(&mut a[..], flags));
[INFO] [stdout]     |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:218:23
[INFO] [stdout]     |
[INFO] [stdout] 218 |         let address = try!(tosocketaddrs_to_sockaddr(toaddress));
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/lib.rs:39:21
[INFO] [stdout]    |
[INFO] [stdout] 39 |         let value = unsafe { $fun($($x,)*) };
[INFO] [stdout]    |                     ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] ...
[INFO] [stdout] 81 |     unsafe {
[INFO] [stdout]    |     ------ because it's nested under this `unsafe` block
[INFO] [stdout] 82 |         let mut fds: [c_int; 2] = mem::zeroed();
[INFO] [stdout] 83 |         _try!(c_socketpair, domain as c_int, type_ as c_int, protocol as c_int, &mut fds as *mut [c_int]);
[INFO] [stdout]    |         ------------------------------------------------------------------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_unsafe)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]    = note: this warning originates in the macro `_try` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]    --> src/lib.rs:129:9
[INFO] [stdout]     |
[INFO] [stdout] 129 |         unsafe {
[INFO] [stdout]     |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[i32]`, which is not FFI-safe
[INFO] [stdout]   --> src/lib.rs:49:71
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn c_socketpair(domain: c_int, type_: c_int, protocol: c_int, sv: *mut [c_int]) -> c_int;
[INFO] [stdout]    |                                                                       ^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a raw pointer instead
[INFO] [stdout]    = note: slices have no C equivalent
[INFO] [stdout]    = note: `#[warn(improper_ctypes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.95s
[INFO] running `Command { std: "docker" "inspect" "39d1f60df5079897667f6eb8d2c0473750c9141791c7a315f673a85be59faf32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39d1f60df5079897667f6eb8d2c0473750c9141791c7a315f673a85be59faf32", kill_on_drop: false }`
[INFO] [stdout] 39d1f60df5079897667f6eb8d2c0473750c9141791c7a315f673a85be59faf32
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a4aa223865b2e395fc86b6f68267386ccd47dedfef27f90b33867fd40782dc75
[INFO] running `Command { std: "docker" "start" "-a" "a4aa223865b2e395fc86b6f68267386ccd47dedfef27f90b33867fd40782dc75", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling socket v0.0.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `extern` declarations without an explicit ABI are deprecated
[INFO] [stdout]   --> src/lib.rs:47:1
[INFO] [stdout]    |
[INFO] [stdout] 47 | extern {
[INFO] [stdout]    | ^^^^^^ help: explicitly specify the "C" ABI: `extern "C"`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(missing_abi)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:95:62
[INFO] [stdout]    |
[INFO] [stdout] 95 |     let addresses: Vec<SocketAddr> = FromIterator::from_iter(try!(address.to_socket_addrs()));
[INFO] [stdout]    |                                                              ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:113:32
[INFO] [stdout]     |
[INFO] [stdout] 113 |     Ok(socketaddr_to_sockaddr(&try!(tosocketaddrs_to_socketaddr(address))))
[INFO] [stdout]     |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:140:18
[INFO] [stdout]     |
[INFO] [stdout] 140 |         let sa = try!(tosocketaddrs_to_sockaddr(address));
[INFO] [stdout]     |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:157:18
[INFO] [stdout]     |
[INFO] [stdout] 157 |         let sa = try!(tosocketaddrs_to_sockaddr(address));
[INFO] [stdout]     |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:179:39
[INFO] [stdout]     |
[INFO] [stdout] 179 |         let (socket_addr, received) = try!(self.recvfrom_into(&mut a[..], flags));
[INFO] [stdout]     |                                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:204:24
[INFO] [stdout]     |
[INFO] [stdout] 204 |         let received = try!(self.recv_into(&mut a[..], flags));
[INFO] [stdout]     |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:218:23
[INFO] [stdout]     |
[INFO] [stdout] 218 |         let address = try!(tosocketaddrs_to_sockaddr(toaddress));
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/lib.rs:39:21
[INFO] [stdout]    |
[INFO] [stdout] 39 |         let value = unsafe { $fun($($x,)*) };
[INFO] [stdout]    |                     ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] ...
[INFO] [stdout] 81 |     unsafe {
[INFO] [stdout]    |     ------ because it's nested under this `unsafe` block
[INFO] [stdout] 82 |         let mut fds: [c_int; 2] = mem::zeroed();
[INFO] [stdout] 83 |         _try!(c_socketpair, domain as c_int, type_ as c_int, protocol as c_int, &mut fds as *mut [c_int]);
[INFO] [stdout]    |         ------------------------------------------------------------------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_unsafe)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]    = note: this warning originates in the macro `_try` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]    --> src/lib.rs:129:9
[INFO] [stdout]     |
[INFO] [stdout] 129 |         unsafe {
[INFO] [stdout]     |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[i32]`, which is not FFI-safe
[INFO] [stdout]   --> src/lib.rs:49:71
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn c_socketpair(domain: c_int, type_: c_int, protocol: c_int, sv: *mut [c_int]) -> c_int;
[INFO] [stdout]    |                                                                       ^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a raw pointer instead
[INFO] [stdout]    = note: slices have no C equivalent
[INFO] [stdout]    = note: `#[warn(improper_ctypes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` declarations without an explicit ABI are deprecated
[INFO] [stdout]   --> src/lib.rs:47:1
[INFO] [stdout]    |
[INFO] [stdout] 47 | extern {
[INFO] [stdout]    | ^^^^^^ help: explicitly specify the "C" ABI: `extern "C"`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(missing_abi)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:95:62
[INFO] [stdout]    |
[INFO] [stdout] 95 |     let addresses: Vec<SocketAddr> = FromIterator::from_iter(try!(address.to_socket_addrs()));
[INFO] [stdout]    |                                                              ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:113:32
[INFO] [stdout]     |
[INFO] [stdout] 113 |     Ok(socketaddr_to_sockaddr(&try!(tosocketaddrs_to_socketaddr(address))))
[INFO] [stdout]     |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:140:18
[INFO] [stdout]     |
[INFO] [stdout] 140 |         let sa = try!(tosocketaddrs_to_sockaddr(address));
[INFO] [stdout]     |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:157:18
[INFO] [stdout]     |
[INFO] [stdout] 157 |         let sa = try!(tosocketaddrs_to_sockaddr(address));
[INFO] [stdout]     |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:179:39
[INFO] [stdout]     |
[INFO] [stdout] 179 |         let (socket_addr, received) = try!(self.recvfrom_into(&mut a[..], flags));
[INFO] [stdout]     |                                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:204:24
[INFO] [stdout]     |
[INFO] [stdout] 204 |         let received = try!(self.recv_into(&mut a[..], flags));
[INFO] [stdout]     |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:218:23
[INFO] [stdout]     |
[INFO] [stdout] 218 |         let address = try!(tosocketaddrs_to_sockaddr(toaddress));
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/lib.rs:39:21
[INFO] [stdout]    |
[INFO] [stdout] 39 |         let value = unsafe { $fun($($x,)*) };
[INFO] [stdout]    |                     ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] ...
[INFO] [stdout] 81 |     unsafe {
[INFO] [stdout]    |     ------ because it's nested under this `unsafe` block
[INFO] [stdout] 82 |         let mut fds: [c_int; 2] = mem::zeroed();
[INFO] [stdout] 83 |         _try!(c_socketpair, domain as c_int, type_ as c_int, protocol as c_int, &mut fds as *mut [c_int]);
[INFO] [stdout]    |         ------------------------------------------------------------------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_unsafe)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]    = note: this warning originates in the macro `_try` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]    --> src/lib.rs:129:9
[INFO] [stdout]     |
[INFO] [stdout] 129 |         unsafe {
[INFO] [stdout]     |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `[i32]`, which is not FFI-safe
[INFO] [stdout]   --> src/lib.rs:49:71
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn c_socketpair(domain: c_int, type_: c_int, protocol: c_int, sv: *mut [c_int]) -> c_int;
[INFO] [stdout]    |                                                                       ^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a raw pointer instead
[INFO] [stdout]    = note: slices have no C equivalent
[INFO] [stdout]    = note: `#[warn(improper_ctypes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:370:9
[INFO] [stdout]     |
[INFO] [stdout] 370 |         thread.join();
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 370 |         let _ = thread.join();
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:384:9
[INFO] [stdout]     |
[INFO] [stdout] 384 |         thread.join();
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 384 |         let _ = thread.join();
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.58s
[INFO] running `Command { std: "docker" "inspect" "a4aa223865b2e395fc86b6f68267386ccd47dedfef27f90b33867fd40782dc75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4aa223865b2e395fc86b6f68267386ccd47dedfef27f90b33867fd40782dc75", kill_on_drop: false }`
[INFO] [stdout] a4aa223865b2e395fc86b6f68267386ccd47dedfef27f90b33867fd40782dc75
