[INFO] cloning repository https://github.com/ls1-sys-prog-course/task4-concurrency
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ls1-sys-prog-course/task4-concurrency" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fls1-sys-prog-course%2Ftask4-concurrency", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fls1-sys-prog-course%2Ftask4-concurrency'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3473e0c1bdf1cba752b28a71978065a2c2a85af9
[INFO] checking ls1-sys-prog-course/task4-concurrency against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fls1-sys-prog-course%2Ftask4-concurrency" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ls1-sys-prog-course/task4-concurrency on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ls1-sys-prog-course/task4-concurrency
[INFO] finished tweaking git repo https://github.com/ls1-sys-prog-course/task4-concurrency
[INFO] tweaked toml for git repo https://github.com/ls1-sys-prog-course/task4-concurrency written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/ls1-sys-prog-course/task4-concurrency already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5fff219587b1c1fcd147b06894fb8e2ad52cb4353914cb65feec6de6ccc4902a
[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" "5fff219587b1c1fcd147b06894fb8e2ad52cb4353914cb65feec6de6ccc4902a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5fff219587b1c1fcd147b06894fb8e2ad52cb4353914cb65feec6de6ccc4902a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fff219587b1c1fcd147b06894fb8e2ad52cb4353914cb65feec6de6ccc4902a", kill_on_drop: false }`
[INFO] [stdout] 5fff219587b1c1fcd147b06894fb8e2ad52cb4353914cb65feec6de6ccc4902a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bc25cb856e8a4a00e3dc60396f518f14060406f7c0aa45ea386889048cb90a54
[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" "bc25cb856e8a4a00e3dc60396f518f14060406f7c0aa45ea386889048cb90a54", kill_on_drop: false }`
[INFO] [stderr]     Checking lockhashmap v0.0.1 (/opt/rustwide/workdir/lockhashmap)
[INFO] [stderr]     Checking lockfreehashmap v0.0.1 (/opt/rustwide/workdir/lockfreehashmap)
[INFO] [stderr]     Checking cspinlock v0.0.1 (/opt/rustwide/workdir/cspinlock)
[INFO] [stdout] warning: unused variable: `n_buckets`
[INFO] [stdout]  --> lockhashmap/src/lib.rs:5:33
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub extern "C" fn alloc_hashmap(n_buckets: libc::size_t) -> *mut HM {
[INFO] [stdout]   |                                 ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_n_buckets`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hm`
[INFO] [stdout]   --> lockhashmap/src/lib.rs:11:32
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub extern "C" fn free_hashmap(hm: *mut HM) {}
[INFO] [stdout]    |                                ^^ help: if this is intentional, prefix it with an underscore: `_hm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hm`
[INFO] [stdout]   --> lockhashmap/src/lib.rs:15:31
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub extern "C" fn insert_item(hm: *mut HM, val: libc::c_long) -> libc::c_int {
[INFO] [stdout]    |                               ^^ help: if this is intentional, prefix it with an underscore: `_hm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> lockhashmap/src/lib.rs:15:44
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub extern "C" fn insert_item(hm: *mut HM, val: libc::c_long) -> libc::c_int {
[INFO] [stdout]    |                                            ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hm`
[INFO] [stdout]   --> lockhashmap/src/lib.rs:21:31
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub extern "C" fn remove_item(hm: *mut HM, val: libc::c_long) -> libc::c_int {
[INFO] [stdout]    |                               ^^ help: if this is intentional, prefix it with an underscore: `_hm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> lockhashmap/src/lib.rs:21:44
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub extern "C" fn remove_item(hm: *mut HM, val: libc::c_long) -> libc::c_int {
[INFO] [stdout]    |                                            ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n_buckets`
[INFO] [stdout]  --> lockhashmap/src/lib.rs:5:33
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub extern "C" fn alloc_hashmap(n_buckets: libc::size_t) -> *mut HM {
[INFO] [stdout]   |                                 ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_n_buckets`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hm`
[INFO] [stdout]   --> lockhashmap/src/lib.rs:27:31
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub extern "C" fn lookup_item(hm: *mut HM, val: libc::c_long) -> libc::c_int {
[INFO] [stdout]    |                               ^^ help: if this is intentional, prefix it with an underscore: `_hm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hm`
[INFO] [stdout]   --> lockhashmap/src/lib.rs:11:32
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub extern "C" fn free_hashmap(hm: *mut HM) {}
[INFO] [stdout]    |                                ^^ help: if this is intentional, prefix it with an underscore: `_hm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> lockhashmap/src/lib.rs:27:44
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub extern "C" fn lookup_item(hm: *mut HM, val: libc::c_long) -> libc::c_int {
[INFO] [stdout]    |                                            ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hm`
[INFO] [stdout]   --> lockhashmap/src/lib.rs:15:31
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub extern "C" fn insert_item(hm: *mut HM, val: libc::c_long) -> libc::c_int {
[INFO] [stdout]    |                               ^^ help: if this is intentional, prefix it with an underscore: `_hm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hm`
[INFO] [stdout]   --> lockhashmap/src/lib.rs:36:33
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub extern "C" fn print_hashmap(hm: *mut HM) {}
[INFO] [stdout]    |                                 ^^ help: if this is intentional, prefix it with an underscore: `_hm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> lockhashmap/src/lib.rs:15:44
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub extern "C" fn insert_item(hm: *mut HM, val: libc::c_long) -> libc::c_int {
[INFO] [stdout]    |                                            ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hm`
[INFO] [stdout]   --> lockhashmap/src/lib.rs:21:31
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub extern "C" fn remove_item(hm: *mut HM, val: libc::c_long) -> libc::c_int {
[INFO] [stdout]    |                               ^^ help: if this is intentional, prefix it with an underscore: `_hm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> lockhashmap/src/lib.rs:21:44
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub extern "C" fn remove_item(hm: *mut HM, val: libc::c_long) -> libc::c_int {
[INFO] [stdout]    |                                            ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hm`
[INFO] [stdout]   --> lockhashmap/src/lib.rs:27:31
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub extern "C" fn lookup_item(hm: *mut HM, val: libc::c_long) -> libc::c_int {
[INFO] [stdout]    |                               ^^ help: if this is intentional, prefix it with an underscore: `_hm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> lockhashmap/src/lib.rs:27:44
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub extern "C" fn lookup_item(hm: *mut HM, val: libc::c_long) -> libc::c_int {
[INFO] [stdout]    |                                            ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hm`
[INFO] [stdout]   --> lockhashmap/src/lib.rs:36:33
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub extern "C" fn print_hashmap(hm: *mut HM) {}
[INFO] [stdout]    |                                 ^^ help: if this is intentional, prefix it with an underscore: `_hm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `raw_lock`
[INFO] [stdout]  --> cspinlock/src/lib.rs:7:30
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub extern "C" fn cspin_lock(raw_lock: *mut cspinlock_t) -> libc::c_int {
[INFO] [stdout]   |                              ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_raw_lock`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `raw_lock`
[INFO] [stdout]   --> cspinlock/src/lib.rs:13:32
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub extern "C" fn cspin_unlock(raw_lock: *mut cspinlock_t) -> libc::c_int {
[INFO] [stdout]    |                                ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_raw_lock`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lock`
[INFO] [stdout]   --> cspinlock/src/lib.rs:25:30
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub extern "C" fn cspin_free(lock: *mut cspinlock_t) {}
[INFO] [stdout]    |                              ^^^^ help: if this is intentional, prefix it with an underscore: `_lock`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n_buckets`
[INFO] [stdout]  --> lockfreehashmap/src/lib.rs:5:33
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub extern "C" fn alloc_hashmap(n_buckets: libc::size_t) -> *mut HM {
[INFO] [stdout]   |                                 ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_n_buckets`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hm`
[INFO] [stdout]   --> lockfreehashmap/src/lib.rs:11:32
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub extern "C" fn free_hashmap(hm: *mut HM) {}
[INFO] [stdout]    |                                ^^ help: if this is intentional, prefix it with an underscore: `_hm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hm`
[INFO] [stdout]   --> lockfreehashmap/src/lib.rs:15:31
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub extern "C" fn insert_item(hm: *mut HM, val: libc::c_long) -> libc::c_int {
[INFO] [stdout]    |                               ^^ help: if this is intentional, prefix it with an underscore: `_hm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> lockfreehashmap/src/lib.rs:15:44
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub extern "C" fn insert_item(hm: *mut HM, val: libc::c_long) -> libc::c_int {
[INFO] [stdout]    |                                            ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hm`
[INFO] [stdout]   --> lockfreehashmap/src/lib.rs:21:31
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub extern "C" fn remove_item(hm: *mut HM, val: libc::c_long) -> libc::c_int {
[INFO] [stdout]    |                               ^^ help: if this is intentional, prefix it with an underscore: `_hm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> lockfreehashmap/src/lib.rs:21:44
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub extern "C" fn remove_item(hm: *mut HM, val: libc::c_long) -> libc::c_int {
[INFO] [stdout]    |                                            ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hm`
[INFO] [stdout]   --> lockfreehashmap/src/lib.rs:27:31
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub extern "C" fn lookup_item(hm: *mut HM, val: libc::c_long) -> libc::c_int {
[INFO] [stdout]    |                               ^^ help: if this is intentional, prefix it with an underscore: `_hm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> lockfreehashmap/src/lib.rs:27:44
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub extern "C" fn lookup_item(hm: *mut HM, val: libc::c_long) -> libc::c_int {
[INFO] [stdout]    |                                            ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hm`
[INFO] [stdout]   --> lockfreehashmap/src/lib.rs:36:33
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub extern "C" fn print_hashmap(hm: *mut HM) {}
[INFO] [stdout]    |                                 ^^ help: if this is intentional, prefix it with an underscore: `_hm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `raw_lock`
[INFO] [stdout]  --> cspinlock/src/lib.rs:7:30
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub extern "C" fn cspin_lock(raw_lock: *mut cspinlock_t) -> libc::c_int {
[INFO] [stdout]   |                              ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_raw_lock`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `raw_lock`
[INFO] [stdout]   --> cspinlock/src/lib.rs:13:32
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub extern "C" fn cspin_unlock(raw_lock: *mut cspinlock_t) -> libc::c_int {
[INFO] [stdout]    |                                ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_raw_lock`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lock`
[INFO] [stdout]   --> cspinlock/src/lib.rs:25:30
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub extern "C" fn cspin_free(lock: *mut cspinlock_t) {}
[INFO] [stdout]    |                              ^^^^ help: if this is intentional, prefix it with an underscore: `_lock`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n_buckets`
[INFO] [stdout]  --> lockfreehashmap/src/lib.rs:5:33
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub extern "C" fn alloc_hashmap(n_buckets: libc::size_t) -> *mut HM {
[INFO] [stdout]   |                                 ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_n_buckets`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hm`
[INFO] [stdout]   --> lockfreehashmap/src/lib.rs:11:32
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub extern "C" fn free_hashmap(hm: *mut HM) {}
[INFO] [stdout]    |                                ^^ help: if this is intentional, prefix it with an underscore: `_hm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hm`
[INFO] [stdout]   --> lockfreehashmap/src/lib.rs:15:31
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub extern "C" fn insert_item(hm: *mut HM, val: libc::c_long) -> libc::c_int {
[INFO] [stdout]    |                               ^^ help: if this is intentional, prefix it with an underscore: `_hm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> lockfreehashmap/src/lib.rs:15:44
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub extern "C" fn insert_item(hm: *mut HM, val: libc::c_long) -> libc::c_int {
[INFO] [stdout]    |                                            ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hm`
[INFO] [stdout]   --> lockfreehashmap/src/lib.rs:21:31
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub extern "C" fn remove_item(hm: *mut HM, val: libc::c_long) -> libc::c_int {
[INFO] [stdout]    |                               ^^ help: if this is intentional, prefix it with an underscore: `_hm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> lockfreehashmap/src/lib.rs:21:44
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub extern "C" fn remove_item(hm: *mut HM, val: libc::c_long) -> libc::c_int {
[INFO] [stdout]    |                                            ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hm`
[INFO] [stdout]   --> lockfreehashmap/src/lib.rs:27:31
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub extern "C" fn lookup_item(hm: *mut HM, val: libc::c_long) -> libc::c_int {
[INFO] [stdout]    |                               ^^ help: if this is intentional, prefix it with an underscore: `_hm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> lockfreehashmap/src/lib.rs:27:44
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub extern "C" fn lookup_item(hm: *mut HM, val: libc::c_long) -> libc::c_int {
[INFO] [stdout]    |                                            ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hm`
[INFO] [stdout]   --> lockfreehashmap/src/lib.rs:36:33
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub extern "C" fn print_hashmap(hm: *mut HM) {}
[INFO] [stdout]    |                                 ^^ help: if this is intentional, prefix it with an underscore: `_hm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.60s
[INFO] running `Command { std: "docker" "inspect" "bc25cb856e8a4a00e3dc60396f518f14060406f7c0aa45ea386889048cb90a54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc25cb856e8a4a00e3dc60396f518f14060406f7c0aa45ea386889048cb90a54", kill_on_drop: false }`
[INFO] [stdout] bc25cb856e8a4a00e3dc60396f518f14060406f7c0aa45ea386889048cb90a54