[INFO] fetching crate libcgroup_rs 0.1.0...
[INFO] testing libcgroup_rs-0.1.0 against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210-1
[INFO] extracting crate libcgroup_rs 0.1.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate libcgroup_rs 0.1.0
[INFO] finished tweaking crates.io crate libcgroup_rs 0.1.0
[INFO] tweaked toml for crates.io crate libcgroup_rs 0.1.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate libcgroup_rs 0.1.0 on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "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" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 2 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 07480ad074442d34b74c8d149d8be6a8d16e9ab7e6eb8793536e943fa1f35289
[INFO] running `Command { std: "docker" "start" "-a" "07480ad074442d34b74c8d149d8be6a8d16e9ab7e6eb8793536e943fa1f35289", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "07480ad074442d34b74c8d149d8be6a8d16e9ab7e6eb8793536e943fa1f35289", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07480ad074442d34b74c8d149d8be6a8d16e9ab7e6eb8793536e943fa1f35289", kill_on_drop: false }`
[INFO] [stdout] 07480ad074442d34b74c8d149d8be6a8d16e9ab7e6eb8793536e943fa1f35289
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ac1d216c65ea33882b80a57146d65bc5841b6e7144a99ddaba01c1760f6cb7f2
[INFO] running `Command { std: "docker" "start" "-a" "ac1d216c65ea33882b80a57146d65bc5841b6e7144a99ddaba01c1760f6cb7f2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libcgroup_rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `name` and `c_groups` are never read
[INFO] [stdout]   --> src/manipulation.rs:95:5
[INFO] [stdout]    |
[INFO] [stdout] 94 | pub struct CGroupControllerBuilder{
[INFO] [stdout]    |            ----------------------- fields in this struct
[INFO] [stdout] 95 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 96 |     c_groups:*mut cgroup,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CGroupControllerBuilder` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/manipulation.rs:569:38
[INFO] [stdout]     |
[INFO] [stdout] 569 |             match Self::new(self.name.clone()) {
[INFO] [stdout]     |                                      ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this creates a dangling pointer because temporary `CString` is dropped at end of statement
[INFO] [stdout]    --> src/iterators.rs:124:59
[INFO] [stdout]     |
[INFO] [stdout] 124 |             ctrl_name: std::ffi::CString::new(ctrl_name)?.as_ptr(),
[INFO] [stdout]     |                        ---------------------------------- ^^^^^^ pointer created here
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        this `CString` is dropped at end of statement
[INFO] [stdout]     |
[INFO] [stdout]     = help: bind the `CString` to a variable such that it outlives the pointer returned by `as_ptr`
[INFO] [stdout]     = note: a dangling pointer is safe, but dereferencing one is undefined behavior
[INFO] [stdout]     = note: returning a pointer to a local variable will always result in a dangling pointer
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/reference/destructors.html>
[INFO] [stdout]     = note: `#[warn(dangling_pointers_from_temporaries)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this creates a dangling pointer because temporary `CString` is dropped at end of statement
[INFO] [stdout]    --> src/iterators.rs:125:59
[INFO] [stdout]     |
[INFO] [stdout] 125 |             base_path: std::ffi::CString::new(base_path)?.as_ptr(),
[INFO] [stdout]     |                        ---------------------------------- ^^^^^^ pointer created here
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        this `CString` is dropped at end of statement
[INFO] [stdout]     |
[INFO] [stdout]     = help: bind the `CString` to a variable such that it outlives the pointer returned by `as_ptr`
[INFO] [stdout]     = note: a dangling pointer is safe, but dereferencing one is undefined behavior
[INFO] [stdout]     = note: returning a pointer to a local variable will always result in a dangling pointer
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/reference/destructors.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this creates a dangling pointer because temporary `CString` is dropped at end of statement
[INFO] [stdout]    --> src/iterators.rs:228:59
[INFO] [stdout]     |
[INFO] [stdout] 228 |             ctrl_name: std::ffi::CString::new(ctrl_name)?.as_ptr(),
[INFO] [stdout]     |                        ---------------------------------- ^^^^^^ pointer created here
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        this `CString` is dropped at end of statement
[INFO] [stdout]     |
[INFO] [stdout]     = help: bind the `CString` to a variable such that it outlives the pointer returned by `as_ptr`
[INFO] [stdout]     = note: a dangling pointer is safe, but dereferencing one is undefined behavior
[INFO] [stdout]     = note: returning a pointer to a local variable will always result in a dangling pointer
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/reference/destructors.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this creates a dangling pointer because temporary `CString` is dropped at end of statement
[INFO] [stdout]    --> src/iterators.rs:229:59
[INFO] [stdout]     |
[INFO] [stdout] 229 |             path_name: std::ffi::CString::new(path_name)?.as_ptr(),
[INFO] [stdout]     |                        ---------------------------------- ^^^^^^ pointer created here
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        this `CString` is dropped at end of statement
[INFO] [stdout]     |
[INFO] [stdout]     = help: bind the `CString` to a variable such that it outlives the pointer returned by `as_ptr`
[INFO] [stdout]     = note: a dangling pointer is safe, but dereferencing one is undefined behavior
[INFO] [stdout]     = note: returning a pointer to a local variable will always result in a dangling pointer
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/reference/destructors.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this creates a dangling pointer because temporary `CString` is dropped at end of statement
[INFO] [stdout]    --> src/iterators.rs:309:55
[INFO] [stdout]     |
[INFO] [stdout] 309 |             cg_name: std::ffi::CString::new(cg_name)?.as_ptr(),
[INFO] [stdout]     |                      -------------------------------- ^^^^^^ pointer created here
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      this `CString` is dropped at end of statement
[INFO] [stdout]     |
[INFO] [stdout]     = help: bind the `CString` to a variable such that it outlives the pointer returned by `as_ptr`
[INFO] [stdout]     = note: a dangling pointer is safe, but dereferencing one is undefined behavior
[INFO] [stdout]     = note: returning a pointer to a local variable will always result in a dangling pointer
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/reference/destructors.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this creates a dangling pointer because temporary `CString` is dropped at end of statement
[INFO] [stdout]    --> src/iterators.rs:310:59
[INFO] [stdout]     |
[INFO] [stdout] 310 |             ctrl_name: std::ffi::CString::new(ctrl_name)?.as_ptr(),
[INFO] [stdout]     |                        ---------------------------------- ^^^^^^ pointer created here
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        this `CString` is dropped at end of statement
[INFO] [stdout]     |
[INFO] [stdout]     = help: bind the `CString` to a variable such that it outlives the pointer returned by `as_ptr`
[INFO] [stdout]     = note: a dangling pointer is safe, but dereferencing one is undefined behavior
[INFO] [stdout]     = note: returning a pointer to a local variable will always result in a dangling pointer
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/reference/destructors.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.81s
[INFO] running `Command { std: "docker" "inspect" "ac1d216c65ea33882b80a57146d65bc5841b6e7144a99ddaba01c1760f6cb7f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac1d216c65ea33882b80a57146d65bc5841b6e7144a99ddaba01c1760f6cb7f2", kill_on_drop: false }`
[INFO] [stdout] ac1d216c65ea33882b80a57146d65bc5841b6e7144a99ddaba01c1760f6cb7f2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7c6daeaf04bbc43bb18a4cdb13ddd591ef14c487049e32a12990d111d02de374
[INFO] running `Command { std: "docker" "start" "-a" "7c6daeaf04bbc43bb18a4cdb13ddd591ef14c487049e32a12990d111d02de374", kill_on_drop: false }`
[INFO] [stdout] warning: fields `name` and `c_groups` are never read
[INFO] [stdout]   --> src/manipulation.rs:95:5
[INFO] [stdout]    |
[INFO] [stdout] 94 | pub struct CGroupControllerBuilder{
[INFO] [stdout]    |            ----------------------- fields in this struct
[INFO] [stdout] 95 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 96 |     c_groups:*mut cgroup,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CGroupControllerBuilder` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/manipulation.rs:569:38
[INFO] [stdout]     |
[INFO] [stdout] 569 |             match Self::new(self.name.clone()) {
[INFO] [stdout]     |                                      ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this creates a dangling pointer because temporary `CString` is dropped at end of statement
[INFO] [stdout]    --> src/iterators.rs:124:59
[INFO] [stdout]     |
[INFO] [stdout] 124 |             ctrl_name: std::ffi::CString::new(ctrl_name)?.as_ptr(),
[INFO] [stdout]     |                        ---------------------------------- ^^^^^^ pointer created here
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        this `CString` is dropped at end of statement
[INFO] [stdout]     |
[INFO] [stdout]     = help: bind the `CString` to a variable such that it outlives the pointer returned by `as_ptr`
[INFO] [stdout]     = note: a dangling pointer is safe, but dereferencing one is undefined behavior
[INFO] [stdout]     = note: returning a pointer to a local variable will always result in a dangling pointer
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/reference/destructors.html>
[INFO] [stdout]     = note: `#[warn(dangling_pointers_from_temporaries)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this creates a dangling pointer because temporary `CString` is dropped at end of statement
[INFO] [stdout]    --> src/iterators.rs:125:59
[INFO] [stdout]     |
[INFO] [stdout] 125 |             base_path: std::ffi::CString::new(base_path)?.as_ptr(),
[INFO] [stdout]     |                        ---------------------------------- ^^^^^^ pointer created here
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        this `CString` is dropped at end of statement
[INFO] [stdout]     |
[INFO] [stdout]     = help: bind the `CString` to a variable such that it outlives the pointer returned by `as_ptr`
[INFO] [stdout]     = note: a dangling pointer is safe, but dereferencing one is undefined behavior
[INFO] [stdout]     = note: returning a pointer to a local variable will always result in a dangling pointer
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/reference/destructors.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this creates a dangling pointer because temporary `CString` is dropped at end of statement
[INFO] [stdout]    --> src/iterators.rs:228:59
[INFO] [stdout]     |
[INFO] [stdout] 228 |             ctrl_name: std::ffi::CString::new(ctrl_name)?.as_ptr(),
[INFO] [stdout]     |                        ---------------------------------- ^^^^^^ pointer created here
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        this `CString` is dropped at end of statement
[INFO] [stdout]     |
[INFO] [stdout]     = help: bind the `CString` to a variable such that it outlives the pointer returned by `as_ptr`
[INFO] [stdout]     = note: a dangling pointer is safe, but dereferencing one is undefined behavior
[INFO] [stdout]     = note: returning a pointer to a local variable will always result in a dangling pointer
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/reference/destructors.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this creates a dangling pointer because temporary `CString` is dropped at end of statement
[INFO] [stdout]    --> src/iterators.rs:229:59
[INFO] [stdout]     |
[INFO] [stdout] 229 |             path_name: std::ffi::CString::new(path_name)?.as_ptr(),
[INFO] [stdout]     |                        ---------------------------------- ^^^^^^ pointer created here
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        this `CString` is dropped at end of statement
[INFO] [stdout]     |
[INFO] [stdout]     = help: bind the `CString` to a variable such that it outlives the pointer returned by `as_ptr`
[INFO] [stdout]     = note: a dangling pointer is safe, but dereferencing one is undefined behavior
[INFO] [stdout]     = note: returning a pointer to a local variable will always result in a dangling pointer
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/reference/destructors.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this creates a dangling pointer because temporary `CString` is dropped at end of statement
[INFO] [stdout]    --> src/iterators.rs:309:55
[INFO] [stdout]     |
[INFO] [stdout] 309 |             cg_name: std::ffi::CString::new(cg_name)?.as_ptr(),
[INFO] [stdout]     |                      -------------------------------- ^^^^^^ pointer created here
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      this `CString` is dropped at end of statement
[INFO] [stdout]     |
[INFO] [stdout]     = help: bind the `CString` to a variable such that it outlives the pointer returned by `as_ptr`
[INFO] [stdout]     = note: a dangling pointer is safe, but dereferencing one is undefined behavior
[INFO] [stdout]     = note: returning a pointer to a local variable will always result in a dangling pointer
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/reference/destructors.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this creates a dangling pointer because temporary `CString` is dropped at end of statement
[INFO] [stdout]    --> src/iterators.rs:310:59
[INFO] [stdout]     |
[INFO] [stdout] 310 |             ctrl_name: std::ffi::CString::new(ctrl_name)?.as_ptr(),
[INFO] [stdout]     |                        ---------------------------------- ^^^^^^ pointer created here
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        this `CString` is dropped at end of statement
[INFO] [stdout]     |
[INFO] [stdout]     = help: bind the `CString` to a variable such that it outlives the pointer returned by `as_ptr`
[INFO] [stdout]     = note: a dangling pointer is safe, but dereferencing one is undefined behavior
[INFO] [stdout]     = note: returning a pointer to a local variable will always result in a dangling pointer
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/reference/destructors.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling libcgroup_rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `libcgroup_rs` (test "test_task") due to 1 previous error
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note:  "cc" "-m64" "/opt/rustwide/target/debug/deps/rustc5RbqsV/symbols.o" "<2 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libtest-*,libgetopts-*,librustc_std_workspace_std-*}.rlib" "/opt/rustwide/target/debug/deps/{liblibcgroup_rs-ec9a0847397858ae,liblibc-9017ff0c40a5fc6a,liblog-d269868761ac548a}.rlib" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libstd-*,libpanic_unwind-*,libobject-*,libmemchr-*,libaddr2line-*,libgimli-*,libcfg_if-*,librustc_demangle-*,libstd_detect-*,libhashbrown-*,librustc_std_workspace_alloc-*,libminiz_oxide-*,libadler2-*,libunwind-*,liblibc-*,librustc_std_workspace_core-*,liballoc-*,libcore-*,libcompiler_builtins-*}.rlib" "-Wl,-Bdynamic" "-lcgroup" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-L" "/opt/rustwide/target/debug/deps/rustc5RbqsV/raw-dylibs" "-B<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/bin/gcc-ld" "-fuse-ld=lld" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/test_task-1bd2b34073ab11e6" "-Wl,--gc-sections" "-pie" "-Wl,-z,relro,-z,now" "-nodefaultlibs"
[INFO] [stdout]   = note: some arguments are omitted. use `--verbose` to show all linker arguments
[INFO] [stdout]   = note: rust-lld: error: unable to find library -lcgroup
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: fields `name` and `c_groups` are never read
[INFO] [stdout]   --> src/manipulation.rs:95:5
[INFO] [stdout]    |
[INFO] [stdout] 94 | pub struct CGroupControllerBuilder{
[INFO] [stdout]    |            ----------------------- fields in this struct
[INFO] [stdout] 95 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 96 |     c_groups:*mut cgroup,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CGroupControllerBuilder` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/manipulation.rs:569:38
[INFO] [stdout]     |
[INFO] [stdout] 569 |             match Self::new(self.name.clone()) {
[INFO] [stdout]     |                                      ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this creates a dangling pointer because temporary `CString` is dropped at end of statement
[INFO] [stdout]    --> src/iterators.rs:124:59
[INFO] [stdout]     |
[INFO] [stdout] 124 |             ctrl_name: std::ffi::CString::new(ctrl_name)?.as_ptr(),
[INFO] [stdout]     |                        ---------------------------------- ^^^^^^ pointer created here
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        this `CString` is dropped at end of statement
[INFO] [stdout]     |
[INFO] [stdout]     = help: bind the `CString` to a variable such that it outlives the pointer returned by `as_ptr`
[INFO] [stdout]     = note: a dangling pointer is safe, but dereferencing one is undefined behavior
[INFO] [stdout]     = note: returning a pointer to a local variable will always result in a dangling pointer
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/reference/destructors.html>
[INFO] [stdout]     = note: `#[warn(dangling_pointers_from_temporaries)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this creates a dangling pointer because temporary `CString` is dropped at end of statement
[INFO] [stdout]    --> src/iterators.rs:125:59
[INFO] [stdout]     |
[INFO] [stdout] 125 |             base_path: std::ffi::CString::new(base_path)?.as_ptr(),
[INFO] [stdout]     |                        ---------------------------------- ^^^^^^ pointer created here
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        this `CString` is dropped at end of statement
[INFO] [stdout]     |
[INFO] [stdout]     = help: bind the `CString` to a variable such that it outlives the pointer returned by `as_ptr`
[INFO] [stdout]     = note: a dangling pointer is safe, but dereferencing one is undefined behavior
[INFO] [stdout]     = note: returning a pointer to a local variable will always result in a dangling pointer
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/reference/destructors.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this creates a dangling pointer because temporary `CString` is dropped at end of statement
[INFO] [stdout]    --> src/iterators.rs:228:59
[INFO] [stdout]     |
[INFO] [stdout] 228 |             ctrl_name: std::ffi::CString::new(ctrl_name)?.as_ptr(),
[INFO] [stdout]     |                        ---------------------------------- ^^^^^^ pointer created here
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        this `CString` is dropped at end of statement
[INFO] [stdout]     |
[INFO] [stdout]     = help: bind the `CString` to a variable such that it outlives the pointer returned by `as_ptr`
[INFO] [stdout]     = note: a dangling pointer is safe, but dereferencing one is undefined behavior
[INFO] [stdout]     = note: returning a pointer to a local variable will always result in a dangling pointer
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/reference/destructors.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this creates a dangling pointer because temporary `CString` is dropped at end of statement
[INFO] [stdout]    --> src/iterators.rs:229:59
[INFO] [stdout]     |
[INFO] [stdout] 229 |             path_name: std::ffi::CString::new(path_name)?.as_ptr(),
[INFO] [stdout]     |                        ---------------------------------- ^^^^^^ pointer created here
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        this `CString` is dropped at end of statement
[INFO] [stdout]     |
[INFO] [stdout]     = help: bind the `CString` to a variable such that it outlives the pointer returned by `as_ptr`
[INFO] [stdout]     = note: a dangling pointer is safe, but dereferencing one is undefined behavior
[INFO] [stdout]     = note: returning a pointer to a local variable will always result in a dangling pointer
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/reference/destructors.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this creates a dangling pointer because temporary `CString` is dropped at end of statement
[INFO] [stdout]    --> src/iterators.rs:309:55
[INFO] [stdout]     |
[INFO] [stdout] 309 |             cg_name: std::ffi::CString::new(cg_name)?.as_ptr(),
[INFO] [stdout]     |                      -------------------------------- ^^^^^^ pointer created here
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      this `CString` is dropped at end of statement
[INFO] [stdout]     |
[INFO] [stdout]     = help: bind the `CString` to a variable such that it outlives the pointer returned by `as_ptr`
[INFO] [stdout]     = note: a dangling pointer is safe, but dereferencing one is undefined behavior
[INFO] [stdout]     = note: returning a pointer to a local variable will always result in a dangling pointer
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/reference/destructors.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note:  "cc" "-m64" "/opt/rustwide/target/debug/deps/rustcbIaqhw/symbols.o" "<2 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libtest-*,libgetopts-*,librustc_std_workspace_std-*}.rlib" "/opt/rustwide/target/debug/deps/{liblibcgroup_rs-ec9a0847397858ae,liblibc-9017ff0c40a5fc6a,liblog-d269868761ac548a}.rlib" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libstd-*,libpanic_unwind-*,libobject-*,libmemchr-*,libaddr2line-*,libgimli-*,libcfg_if-*,librustc_demangle-*,libstd_detect-*,libhashbrown-*,librustc_std_workspace_alloc-*,libminiz_oxide-*,libadler2-*,libunwind-*,liblibc-*,librustc_std_workspace_core-*,liballoc-*,libcore-*,libcompiler_builtins-*}.rlib" "-Wl,-Bdynamic" "-lcgroup" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-L" "/opt/rustwide/target/debug/deps/rustcbIaqhw/raw-dylibs" "-B<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/bin/gcc-ld" "-fuse-ld=lld" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/test_work-fe960eb3d08d5972" "-Wl,--gc-sections" "-pie" "-Wl,-z,relro,-z,now" "-nodefaultlibs"
[INFO] [stdout]   = note: some arguments are omitted. use `--verbose` to show all linker arguments
[INFO] [stdout]   = note: rust-lld: error: unable to find library -lcgroup
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this creates a dangling pointer because temporary `CString` is dropped at end of statement
[INFO] [stdout]    --> src/iterators.rs:310:59
[INFO] [stdout]     |
[INFO] [stdout] 310 |             ctrl_name: std::ffi::CString::new(ctrl_name)?.as_ptr(),
[INFO] [stdout]     |                        ---------------------------------- ^^^^^^ pointer created here
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        this `CString` is dropped at end of statement
[INFO] [stdout]     |
[INFO] [stdout]     = help: bind the `CString` to a variable such that it outlives the pointer returned by `as_ptr`
[INFO] [stdout]     = note: a dangling pointer is safe, but dereferencing one is undefined behavior
[INFO] [stdout]     = note: returning a pointer to a local variable will always result in a dangling pointer
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/reference/destructors.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `libcgroup_rs` (test "test_work") due to 1 previous error
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note:  "cc" "-m64" "/opt/rustwide/target/debug/deps/rustc3gFTrE/symbols.o" "<2 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libtest-*,libgetopts-*,librustc_std_workspace_std-*}.rlib" "/opt/rustwide/target/debug/deps/{liblibcgroup_rs-ec9a0847397858ae,liblibc-9017ff0c40a5fc6a,liblog-d269868761ac548a}.rlib" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libstd-*,libpanic_unwind-*,libobject-*,libmemchr-*,libaddr2line-*,libgimli-*,libcfg_if-*,librustc_demangle-*,libstd_detect-*,libhashbrown-*,librustc_std_workspace_alloc-*,libminiz_oxide-*,libadler2-*,libunwind-*,liblibc-*,librustc_std_workspace_core-*,liballoc-*,libcore-*,libcompiler_builtins-*}.rlib" "-Wl,-Bdynamic" "-lcgroup" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-L" "/opt/rustwide/target/debug/deps/rustc3gFTrE/raw-dylibs" "-B<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/bin/gcc-ld" "-fuse-ld=lld" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/test_iter-ceb8a00d33496820" "-Wl,--gc-sections" "-pie" "-Wl,-z,relro,-z,now" "-nodefaultlibs"
[INFO] [stdout]   = note: some arguments are omitted. use `--verbose` to show all linker arguments
[INFO] [stdout]   = note: rust-lld: error: unable to find library -lcgroup
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `libcgroup_rs` (test "test_iter") due to 1 previous error
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note:  "cc" "-m64" "/opt/rustwide/target/debug/deps/rustcqonrUG/symbols.o" "<2 object files omitted>" "-Wl,--as-needed" "-Wl,-Bdynamic" "-lcgroup" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/liblibc-9017ff0c40a5fc6a.rlib" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libtest-*,libgetopts-*,librustc_std_workspace_std-*}.rlib" "/opt/rustwide/target/debug/deps/liblog-d269868761ac548a.rlib" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libstd-*,libpanic_unwind-*,libobject-*,libmemchr-*,libaddr2line-*,libgimli-*,libcfg_if-*,librustc_demangle-*,libstd_detect-*,libhashbrown-*,librustc_std_workspace_alloc-*,libminiz_oxide-*,libadler2-*,libunwind-*,liblibc-*,librustc_std_workspace_core-*,liballoc-*,libcore-*,libcompiler_builtins-*}.rlib" "-Wl,-Bdynamic" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-L" "/opt/rustwide/target/debug/deps/rustcqonrUG/raw-dylibs" "-B<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/bin/gcc-ld" "-fuse-ld=lld" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/libcgroup_rs-b3061f0c1037ae2d" "-Wl,--gc-sections" "-pie" "-Wl,-z,relro,-z,now" "-nodefaultlibs"
[INFO] [stdout]   = note: some arguments are omitted. use `--verbose` to show all linker arguments
[INFO] [stdout]   = note: rust-lld: error: unable to find library -lcgroup
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `libcgroup_rs` (lib test) due to 1 previous error; 8 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "7c6daeaf04bbc43bb18a4cdb13ddd591ef14c487049e32a12990d111d02de374", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c6daeaf04bbc43bb18a4cdb13ddd591ef14c487049e32a12990d111d02de374", kill_on_drop: false }`
[INFO] [stdout] 7c6daeaf04bbc43bb18a4cdb13ddd591ef14c487049e32a12990d111d02de374