[INFO] fetching crate namespaces-rs 0.1.1...
[INFO] testing namespaces-rs-0.1.1 against 1.54.0 for beta-1.55-1
[INFO] extracting crate namespaces-rs 0.1.1 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate namespaces-rs 0.1.1 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate namespaces-rs 0.1.1
[INFO] finished tweaking crates.io crate namespaces-rs 0.1.1
[INFO] tweaked toml for crates.io crate namespaces-rs 0.1.1 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 88a635f73c4c07b90f581d66233fbde727e18ed5f47d32977242484cb9bff343
[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" "88a635f73c4c07b90f581d66233fbde727e18ed5f47d32977242484cb9bff343", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "88a635f73c4c07b90f581d66233fbde727e18ed5f47d32977242484cb9bff343", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88a635f73c4c07b90f581d66233fbde727e18ed5f47d32977242484cb9bff343", kill_on_drop: false }`
[INFO] [stdout] 88a635f73c4c07b90f581d66233fbde727e18ed5f47d32977242484cb9bff343
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5a48da87f843aa2f751ae0f2d82e1a4dabedb633ed51b8fcf86aebefbc77d16e
[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" "5a48da87f843aa2f751ae0f2d82e1a4dabedb633ed51b8fcf86aebefbc77d16e", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling net2 v0.2.37
[INFO] [stderr]    Compiling uuid v0.8.2
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling tempfile v3.2.0
[INFO] [stderr]    Compiling bincode v1.3.3
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]    Compiling ipc-channel v0.14.1
[INFO] [stderr]    Compiling namespaces-rs v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `child`
[INFO] [stdout]   --> src/advanced.rs:15:41
[INFO] [stdout]    |
[INFO] [stdout] 15 |         Ok(unistd::ForkResult::Parent { child, .. }) => {
[INFO] [stdout]    |                                         ^^^^^ help: try ignoring the field: `child: _`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `child`
[INFO] [stdout]   --> src/advanced.rs:43:41
[INFO] [stdout]    |
[INFO] [stdout] 43 |         Ok(unistd::ForkResult::Parent { child, .. }) => {
[INFO] [stdout]    |                                         ^^^^^ help: try ignoring the field: `child: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: getting the inner pointer of a temporary `CString`
[INFO] [stdout]   --> src/basic.rs:38:65
[INFO] [stdout]    |
[INFO] [stdout] 38 |                     std::ffi::CString::new(i.as_str()).unwrap().as_ptr() as *const libc::c_char,
[INFO] [stdout]    |                     ------------------------------------------- ^^^^^^ this pointer will be invalid
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(temporary_cstring_as_ptr)]` on by default
[INFO] [stdout]    = note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned
[INFO] [stdout]    = help: for more information, see https://doc.rust-lang.org/reference/destructors.html
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/advanced.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |             tx.send(f());
[INFO] [stdout]    |             ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/advanced.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |             tx.send(res);
[INFO] [stdout]    |             ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.18s
[INFO] running `Command { std: "docker" "inspect" "5a48da87f843aa2f751ae0f2d82e1a4dabedb633ed51b8fcf86aebefbc77d16e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a48da87f843aa2f751ae0f2d82e1a4dabedb633ed51b8fcf86aebefbc77d16e", kill_on_drop: false }`
[INFO] [stdout] 5a48da87f843aa2f751ae0f2d82e1a4dabedb633ed51b8fcf86aebefbc77d16e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8321b14c68348df1573fbbb66e6d9fa23946e4182b651dd3a7a3d7ba34ede23f
[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" "8321b14c68348df1573fbbb66e6d9fa23946e4182b651dd3a7a3d7ba34ede23f", kill_on_drop: false }`
[INFO] [stdout] warning: unused variable: `child`
[INFO] [stdout]   --> src/advanced.rs:15:41
[INFO] [stdout]    |
[INFO] [stdout] 15 |         Ok(unistd::ForkResult::Parent { child, .. }) => {
[INFO] [stdout]    |                                         ^^^^^ help: try ignoring the field: `child: _`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `child`
[INFO] [stdout]   --> src/advanced.rs:43:41
[INFO] [stdout]    |
[INFO] [stdout] 43 |         Ok(unistd::ForkResult::Parent { child, .. }) => {
[INFO] [stdout]    |                                         ^^^^^ help: try ignoring the field: `child: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: getting the inner pointer of a temporary `CString`
[INFO] [stdout]   --> src/basic.rs:38:65
[INFO] [stdout]    |
[INFO] [stdout] 38 |                     std::ffi::CString::new(i.as_str()).unwrap().as_ptr() as *const libc::c_char,
[INFO] [stdout]    |                     ------------------------------------------- ^^^^^^ this pointer will be invalid
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(temporary_cstring_as_ptr)]` on by default
[INFO] [stdout]    = note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned
[INFO] [stdout]    = help: for more information, see https://doc.rust-lang.org/reference/destructors.html
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling namespaces-rs v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/advanced.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |             tx.send(f());
[INFO] [stdout]    |             ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/advanced.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |             tx.send(res);
[INFO] [stdout]    |             ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `child`
[INFO] [stdout]   --> src/advanced.rs:15:41
[INFO] [stdout]    |
[INFO] [stdout] 15 |         Ok(unistd::ForkResult::Parent { child, .. }) => {
[INFO] [stdout]    |                                         ^^^^^ help: try ignoring the field: `child: _`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `child`
[INFO] [stdout]   --> src/advanced.rs:43:41
[INFO] [stdout]    |
[INFO] [stdout] 43 |         Ok(unistd::ForkResult::Parent { child, .. }) => {
[INFO] [stdout]    |                                         ^^^^^ help: try ignoring the field: `child: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: getting the inner pointer of a temporary `CString`
[INFO] [stdout]   --> src/basic.rs:38:65
[INFO] [stdout]    |
[INFO] [stdout] 38 |                     std::ffi::CString::new(i.as_str()).unwrap().as_ptr() as *const libc::c_char,
[INFO] [stdout]    |                     ------------------------------------------- ^^^^^^ this pointer will be invalid
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(temporary_cstring_as_ptr)]` on by default
[INFO] [stdout]    = note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned
[INFO] [stdout]    = help: for more information, see https://doc.rust-lang.org/reference/destructors.html
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/advanced.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |             tx.send(f());
[INFO] [stdout]    |             ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/advanced.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |             tx.send(res);
[INFO] [stdout]    |             ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.84s
[INFO] running `Command { std: "docker" "inspect" "8321b14c68348df1573fbbb66e6d9fa23946e4182b651dd3a7a3d7ba34ede23f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8321b14c68348df1573fbbb66e6d9fa23946e4182b651dd3a7a3d7ba34ede23f", kill_on_drop: false }`
[INFO] [stdout] 8321b14c68348df1573fbbb66e6d9fa23946e4182b651dd3a7a3d7ba34ede23f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 17ee2d5784230e1f491c3f0159ec08e2325224555a38c67e31b0eea2e7a68e31
[INFO] running `Command { std: "docker" "start" "-a" "17ee2d5784230e1f491c3f0159ec08e2325224555a38c67e31b0eea2e7a68e31", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused variable: `child`
[INFO] [stderr]   --> src/advanced.rs:15:41
[INFO] [stderr]    |
[INFO] [stderr] 15 |         Ok(unistd::ForkResult::Parent { child, .. }) => {
[INFO] [stderr]    |                                         ^^^^^ help: try ignoring the field: `child: _`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `child`
[INFO] [stderr]   --> src/advanced.rs:43:41
[INFO] [stderr]    |
[INFO] [stderr] 43 |         Ok(unistd::ForkResult::Parent { child, .. }) => {
[INFO] [stderr]    |                                         ^^^^^ help: try ignoring the field: `child: _`
[INFO] [stderr] 
[INFO] [stderr] warning: getting the inner pointer of a temporary `CString`
[INFO] [stderr]   --> src/basic.rs:38:65
[INFO] [stderr]    |
[INFO] [stderr] 38 |                     std::ffi::CString::new(i.as_str()).unwrap().as_ptr() as *const libc::c_char,
[INFO] [stderr]    |                     ------------------------------------------- ^^^^^^ this pointer will be invalid
[INFO] [stderr]    |                     |
[INFO] [stderr]    |                     this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(temporary_cstring_as_ptr)]` on by default
[INFO] [stderr]    = note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned
[INFO] [stderr]    = help: for more information, see https://doc.rust-lang.org/reference/destructors.html
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/advanced.rs:26:13
[INFO] [stderr]    |
[INFO] [stderr] 26 |             tx.send(f());
[INFO] [stderr]    |             ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/advanced.rs:69:13
[INFO] [stderr]    |
[INFO] [stderr] 69 |             tx.send(res);
[INFO] [stderr]    |             ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `child`
[INFO] [stderr]   --> src/advanced.rs:15:41
[INFO] [stderr]    |
[INFO] [stderr] 15 |         Ok(unistd::ForkResult::Parent { child, .. }) => {
[INFO] [stderr]    |                                         ^^^^^ help: try ignoring the field: `child: _`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `child`
[INFO] [stderr]   --> src/advanced.rs:43:41
[INFO] [stderr]    |
[INFO] [stderr] 43 |         Ok(unistd::ForkResult::Parent { child, .. }) => {
[INFO] [stderr]    |                                         ^^^^^ help: try ignoring the field: `child: _`
[INFO] [stderr] 
[INFO] [stderr] warning: getting the inner pointer of a temporary `CString`
[INFO] [stderr]   --> src/basic.rs:38:65
[INFO] [stderr]    |
[INFO] [stderr] 38 |                     std::ffi::CString::new(i.as_str()).unwrap().as_ptr() as *const libc::c_char,
[INFO] [stderr]    |                     ------------------------------------------- ^^^^^^ this pointer will be invalid
[INFO] [stderr]    |                     |
[INFO] [stderr]    |                     this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(temporary_cstring_as_ptr)]` on by default
[INFO] [stderr]    = note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned
[INFO] [stderr]    = help: for more information, see https://doc.rust-lang.org/reference/destructors.html
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/advanced.rs:26:13
[INFO] [stderr]    |
[INFO] [stderr] 26 |             tx.send(f());
[INFO] [stderr]    |             ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/advanced.rs:69:13
[INFO] [stderr]    |
[INFO] [stderr] 69 |             tx.send(res);
[INFO] [stderr]    |             ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.54s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/namespaces-ec8194e23028649c)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test basic::tests::get_namespaces_test ... ok
[INFO] [stderr]    Doc-tests namespaces
[INFO] [stdout] test basic::tests::get_specific_namespaces_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "17ee2d5784230e1f491c3f0159ec08e2325224555a38c67e31b0eea2e7a68e31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17ee2d5784230e1f491c3f0159ec08e2325224555a38c67e31b0eea2e7a68e31", kill_on_drop: false }`
[INFO] [stdout] 17ee2d5784230e1f491c3f0159ec08e2325224555a38c67e31b0eea2e7a68e31
