[INFO] cloning repository https://github.com/wyhhh/leetcode-mt-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wyhhh/leetcode-mt-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwyhhh%2Fleetcode-mt-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwyhhh%2Fleetcode-mt-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9cdd7a1019a11f1c4446ac8e8ccc13f2625bdd7a
[INFO] checking wyhhh/leetcode-mt-rs against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwyhhh%2Fleetcode-mt-rs" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wyhhh/leetcode-mt-rs on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wyhhh/leetcode-mt-rs
[INFO] finished tweaking git repo https://github.com/wyhhh/leetcode-mt-rs
[INFO] tweaked toml for git repo https://github.com/wyhhh/leetcode-mt-rs written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/wyhhh/leetcode-mt-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/wyhhh/conc.git`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded std-semaphore v0.1.0
[INFO] [stderr]   Downloaded crossbeam-channel v0.5.3
[INFO] [stderr]   Downloaded libc v0.2.120
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 87748034d3e2138126e65a188fc0a8335f8983ece4b9aa82bde1266e3d0298d2
[INFO] running `Command { std: "docker" "start" "-a" "87748034d3e2138126e65a188fc0a8335f8983ece4b9aa82bde1266e3d0298d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "87748034d3e2138126e65a188fc0a8335f8983ece4b9aa82bde1266e3d0298d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87748034d3e2138126e65a188fc0a8335f8983ece4b9aa82bde1266e3d0298d2", kill_on_drop: false }`
[INFO] [stdout] 87748034d3e2138126e65a188fc0a8335f8983ece4b9aa82bde1266e3d0298d2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e24d6d0d41f610e073764035ad941e99f66f280f90e58a0758ae129fb94cb6e9
[INFO] running `Command { std: "docker" "start" "-a" "e24d6d0d41f610e073764035ad941e99f66f280f90e58a0758ae129fb94cb6e9", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.120
[INFO] [stderr]     Checking std-semaphore v0.1.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.3
[INFO] [stderr]     Checking getrandom v0.2.5
[INFO] [stderr]     Checking parking_lot_core v0.9.1
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking parking_lot v0.12.0
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking conc v0.1.0 (https://github.com/wyhhh/conc.git#70fa66c9)
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking leetcode-mt-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]  --> src/bin/1226_the_dining_philosophers.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::time::Duration;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solution_with_barrier` is never used
[INFO] [stdout]   --> src/bin/1115_print_foobar_alternately.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn solution_with_barrier() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `deadlock_error_demonstration_with_mutex` is never used
[INFO] [stdout]   --> src/bin/1226_the_dining_philosophers.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn deadlock_error_demonstration_with_mutex() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solution_with_mutexes_and_sema` is never used
[INFO] [stdout]   --> src/bin/1226_the_dining_philosophers.rs:56:4
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn solution_with_mutexes_and_sema() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `soluation_with_first_do_once` is never used
[INFO] [stdout]    --> src/bin/1226_the_dining_philosophers.rs:127:4
[INFO] [stdout]     |
[INFO] [stdout] 127 | fn soluation_with_first_do_once() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solution_with_monitor` is never used
[INFO] [stdout]   --> src/bin/1114_print_in_order.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn solution_with_monitor() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solution_with_semaphore` is never used
[INFO] [stdout]   --> src/bin/1114_print_in_order.rs:82:4
[INFO] [stdout]    |
[INFO] [stdout] 82 | fn solution_with_semaphore() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solution_with_mutex` is never used
[INFO] [stdout]    --> src/bin/1114_print_in_order.rs:132:4
[INFO] [stdout]     |
[INFO] [stdout] 132 | fn solution_with_mutex() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solution_with_sleep` is never used
[INFO] [stdout]    --> src/bin/1114_print_in_order.rs:151:4
[INFO] [stdout]     |
[INFO] [stdout] 151 | fn solution_with_sleep() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]  --> src/bin/1226_the_dining_philosophers.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::time::Duration;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solution_with_barrier` is never used
[INFO] [stdout]   --> src/bin/1115_print_foobar_alternately.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn solution_with_barrier() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solution_with_monitor` is never used
[INFO] [stdout]   --> src/bin/1114_print_in_order.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn solution_with_monitor() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solution_with_semaphore` is never used
[INFO] [stdout]   --> src/bin/1114_print_in_order.rs:82:4
[INFO] [stdout]    |
[INFO] [stdout] 82 | fn solution_with_semaphore() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solution_with_mutex` is never used
[INFO] [stdout]    --> src/bin/1114_print_in_order.rs:132:4
[INFO] [stdout]     |
[INFO] [stdout] 132 | fn solution_with_mutex() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solution_with_sleep` is never used
[INFO] [stdout]    --> src/bin/1114_print_in_order.rs:151:4
[INFO] [stdout]     |
[INFO] [stdout] 151 | fn solution_with_sleep() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `deadlock_error_demonstration_with_mutex` is never used
[INFO] [stdout]   --> src/bin/1226_the_dining_philosophers.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn deadlock_error_demonstration_with_mutex() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solution_with_mutexes_and_sema` is never used
[INFO] [stdout]   --> src/bin/1226_the_dining_philosophers.rs:56:4
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn solution_with_mutexes_and_sema() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `soluation_with_first_do_once` is never used
[INFO] [stdout]    --> src/bin/1226_the_dining_philosophers.rs:127:4
[INFO] [stdout]     |
[INFO] [stdout] 127 | fn soluation_with_first_do_once() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.18s
[INFO] running `Command { std: "docker" "inspect" "e24d6d0d41f610e073764035ad941e99f66f280f90e58a0758ae129fb94cb6e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e24d6d0d41f610e073764035ad941e99f66f280f90e58a0758ae129fb94cb6e9", kill_on_drop: false }`
[INFO] [stdout] e24d6d0d41f610e073764035ad941e99f66f280f90e58a0758ae129fb94cb6e9