[INFO] fetching crate perfrecord-mach-ipc-rendezvous 0.2.1...
[INFO] checking perfrecord-mach-ipc-rendezvous-0.2.1 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate perfrecord-mach-ipc-rendezvous 0.2.1 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate perfrecord-mach-ipc-rendezvous 0.2.1 on toolchain 7014e13d5becc920d4bea3cd87942c8a13d359bf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate perfrecord-mach-ipc-rendezvous 0.2.1
[INFO] finished tweaking crates.io crate perfrecord-mach-ipc-rendezvous 0.2.1
[INFO] tweaked toml for crates.io crate perfrecord-mach-ipc-rendezvous 0.2.1 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 16 packages to latest compatible versions
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (available: v0.13.2+wasi-0.2.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 074fb2b5f89070e629c844101fc1850bc4ddff3c1a01fd4ec1eb2a6f385b6dcb
[INFO] running `Command { std: "docker" "start" "-a" "074fb2b5f89070e629c844101fc1850bc4ddff3c1a01fd4ec1eb2a6f385b6dcb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "074fb2b5f89070e629c844101fc1850bc4ddff3c1a01fd4ec1eb2a6f385b6dcb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "074fb2b5f89070e629c844101fc1850bc4ddff3c1a01fd4ec1eb2a6f385b6dcb", kill_on_drop: false }`
[INFO] [stdout] 074fb2b5f89070e629c844101fc1850bc4ddff3c1a01fd4ec1eb2a6f385b6dcb
[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 -Dtail_expr_drop_order" "-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cc33ebbf0148b1ad158fea592830a6d8cf4a9432435a7b2c55f088c2e0148764
[INFO] running `Command { std: "docker" "start" "-a" "cc33ebbf0148b1ad158fea592830a6d8cf4a9432435a7b2c55f088c2e0148764", kill_on_drop: false }`
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]    Compiling libc v0.2.159
[INFO] [stderr]    Compiling syn v2.0.77
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]     Checking zerocopy v0.7.35
[INFO] [stderr]     Checking ppv-lite86 v0.2.20
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking perfrecord-mach-ipc-rendezvous v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/lib.rs:832:9
[INFO] [stdout]     |
[INFO] [stdout] 832 |            drop(OsIpcReceiver::unregister_global_name(mem::replace(
[INFO] [stdout]     |   _________^    -
[INFO] [stdout]     |  |______________|
[INFO] [stdout] 833 | ||             &mut self.name,
[INFO] [stdout] 834 | ||             String::new(),
[INFO] [stdout] 835 | ||         )));
[INFO] [stdout]     | ||__________-^
[INFO] [stdout]     | |___________|
[INFO] [stdout]     |             argument has type `Result<(), MachError>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 832 ~         let _ = OsIpcReceiver::unregister_global_name(mem::replace(
[INFO] [stdout] 833 |             &mut self.name,
[INFO] [stdout] 834 |             String::new(),
[INFO] [stdout] 835 ~         ));
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/lib.rs:880:9
[INFO] [stdout]     |
[INFO] [stdout] 880 |            drop(OsIpcReceiver::unregister_global_name(mem::replace(
[INFO] [stdout]     |   _________^    -
[INFO] [stdout]     |  |______________|
[INFO] [stdout] 881 | ||             &mut self.name,
[INFO] [stdout] 882 | ||             String::new(),
[INFO] [stdout] 883 | ||         )));
[INFO] [stdout]     | ||__________-^
[INFO] [stdout]     | |___________|
[INFO] [stdout]     |             argument has type `Result<(), MachError>`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 880 ~         let _ = OsIpcReceiver::unregister_global_name(mem::replace(
[INFO] [stdout] 881 |             &mut self.name,
[INFO] [stdout] 882 |             String::new(),
[INFO] [stdout] 883 ~         ));
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/lib.rs:832:9
[INFO] [stdout]     |
[INFO] [stdout] 832 |            drop(OsIpcReceiver::unregister_global_name(mem::replace(
[INFO] [stdout]     |   _________^    -
[INFO] [stdout]     |  |______________|
[INFO] [stdout] 833 | ||             &mut self.name,
[INFO] [stdout] 834 | ||             String::new(),
[INFO] [stdout] 835 | ||         )));
[INFO] [stdout]     | ||__________-^
[INFO] [stdout]     | |___________|
[INFO] [stdout]     |             argument has type `Result<(), MachError>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 832 ~         let _ = OsIpcReceiver::unregister_global_name(mem::replace(
[INFO] [stdout] 833 |             &mut self.name,
[INFO] [stdout] 834 |             String::new(),
[INFO] [stdout] 835 ~         ));
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/lib.rs:880:9
[INFO] [stdout]     |
[INFO] [stdout] 880 |            drop(OsIpcReceiver::unregister_global_name(mem::replace(
[INFO] [stdout]     |   _________^    -
[INFO] [stdout]     |  |______________|
[INFO] [stdout] 881 | ||             &mut self.name,
[INFO] [stdout] 882 | ||             String::new(),
[INFO] [stdout] 883 | ||         )));
[INFO] [stdout]     | ||__________-^
[INFO] [stdout]     | |___________|
[INFO] [stdout]     |             argument has type `Result<(), MachError>`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 880 ~         let _ = OsIpcReceiver::unregister_global_name(mem::replace(
[INFO] [stdout] 881 |             &mut self.name,
[INFO] [stdout] 882 |             String::new(),
[INFO] [stdout] 883 ~         ));
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.07s
[INFO] running `Command { std: "docker" "inspect" "cc33ebbf0148b1ad158fea592830a6d8cf4a9432435a7b2c55f088c2e0148764", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc33ebbf0148b1ad158fea592830a6d8cf4a9432435a7b2c55f088c2e0148764", kill_on_drop: false }`
[INFO] [stdout] cc33ebbf0148b1ad158fea592830a6d8cf4a9432435a7b2c55f088c2e0148764