[INFO] cloning repository https://github.com/Andrei-Vasil/rust-message-queue
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Andrei-Vasil/rust-message-queue" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAndrei-Vasil%2Frust-message-queue", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAndrei-Vasil%2Frust-message-queue'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 002fec5090dafad50160c6ad871356eb89bc95d3
[INFO] checking Andrei-Vasil/rust-message-queue against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAndrei-Vasil%2Frust-message-queue" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Andrei-Vasil/rust-message-queue 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/Andrei-Vasil/rust-message-queue
[INFO] finished tweaking git repo https://github.com/Andrei-Vasil/rust-message-queue
[INFO] tweaked toml for git repo https://github.com/Andrei-Vasil/rust-message-queue written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Andrei-Vasil/rust-message-queue 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]  Downloading crates ...
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.86
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.86
[INFO] [stderr]   Downloaded syn v2.0.16
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.86
[INFO] [stderr]   Downloaded iana-time-zone v0.1.56
[INFO] [stderr]   Downloaded js-sys v0.3.63
[INFO] [stderr]   Downloaded chrono v0.4.24
[INFO] [stderr]   Downloaded regex v1.8.2
[INFO] [stderr]   Downloaded bumpalo v3.12.2
[INFO] [stderr]   Downloaded proc-macro2 v1.0.58
[INFO] [stderr]   Downloaded quote v1.0.27
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.86
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.86
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] a73852ddad7bf74f18e24370c9390ea56f60613ea07be2f4287832094b7fb121
[INFO] running `Command { std: "docker" "start" "-a" "a73852ddad7bf74f18e24370c9390ea56f60613ea07be2f4287832094b7fb121", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a73852ddad7bf74f18e24370c9390ea56f60613ea07be2f4287832094b7fb121", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a73852ddad7bf74f18e24370c9390ea56f60613ea07be2f4287832094b7fb121", kill_on_drop: false }`
[INFO] [stdout] a73852ddad7bf74f18e24370c9390ea56f60613ea07be2f4287832094b7fb121
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 71ab40234ae7c74caeb9b73afd5e3d3f041325fc9e3725bc96614ab11480d3af
[INFO] running `Command { std: "docker" "start" "-a" "71ab40234ae7c74caeb9b73afd5e3d3f041325fc9e3725bc96614ab11480d3af", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling serde v1.0.163
[INFO] [stderr]    Compiling serde_json v1.0.96
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]     Checking regex-syntax v0.7.2
[INFO] [stderr]     Checking aho-corasick v1.0.1
[INFO] [stderr]     Checking iana-time-zone v0.1.56
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking chrono v0.4.24
[INFO] [stderr]     Checking regex v1.8.2
[INFO] [stderr]     Checking rust-message-queue v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/queue_lib/queue.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |         drop(&mut self.daemon_thread);
[INFO] [stdout]    |         ^^^^^-----------------------^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              argument has type `&mut Daemon`
[INFO] [stdout]    |
[INFO] [stdout]    = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/queue_lib/daemon.rs:31:25
[INFO] [stdout]    |
[INFO] [stdout] 31 |                         drop(worker);
[INFO] [stdout]    |                         ^^^^^------^
[INFO] [stdout]    |                              |
[INFO] [stdout]    |                              argument has type `&Worker`
[INFO] [stdout]    |
[INFO] [stdout]    = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/queue_lib/queue.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |         drop(&mut self.daemon_thread);
[INFO] [stdout]    |         ^^^^^-----------------------^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              argument has type `&mut Daemon`
[INFO] [stdout]    |
[INFO] [stdout]    = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/queue_lib/daemon.rs:31:25
[INFO] [stdout]    |
[INFO] [stdout] 31 |                         drop(worker);
[INFO] [stdout]    |                         ^^^^^------^
[INFO] [stdout]    |                              |
[INFO] [stdout]    |                              argument has type `&Worker`
[INFO] [stdout]    |
[INFO] [stdout]    = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.23s
[INFO] running `Command { std: "docker" "inspect" "71ab40234ae7c74caeb9b73afd5e3d3f041325fc9e3725bc96614ab11480d3af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71ab40234ae7c74caeb9b73afd5e3d3f041325fc9e3725bc96614ab11480d3af", kill_on_drop: false }`
[INFO] [stdout] 71ab40234ae7c74caeb9b73afd5e3d3f041325fc9e3725bc96614ab11480d3af