[INFO] fetching crate async_fn 0.0.2...
[INFO] checking async_fn-0.0.2 against try#8d0c454bea9d9cc2cc7e288388f3b7d1da19c04f for pr-114559
[INFO] extracting crate async_fn 0.0.2 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate async_fn 0.0.2 on toolchain 8d0c454bea9d9cc2cc7e288388f3b7d1da19c04f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8d0c454bea9d9cc2cc7e288388f3b7d1da19c04f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-3-tc2/source/.cargo/config
[INFO] removed /workspace/builds/worker-3-tc2/source/rust-toolchain
[INFO] started tweaking crates.io crate async_fn 0.0.2
[INFO] finished tweaking crates.io crate async_fn 0.0.2
[INFO] tweaked toml for crates.io crate async_fn 0.0.2 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8d0c454bea9d9cc2cc7e288388f3b7d1da19c04f" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8d0c454bea9d9cc2cc7e288388f3b7d1da19c04f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:5c16f4e6c37141f9fef0bc86f7a492d732943053e42aab8461035881e3f53823" "/opt/rustwide/cargo-home/bin/cargo" "+8d0c454bea9d9cc2cc7e288388f3b7d1da19c04f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1c221a1e510779266389ff8152baafb9af7271687da80666d40b71e521944983
[INFO] running `Command { std: "docker" "start" "-a" "1c221a1e510779266389ff8152baafb9af7271687da80666d40b71e521944983", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1c221a1e510779266389ff8152baafb9af7271687da80666d40b71e521944983", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c221a1e510779266389ff8152baafb9af7271687da80666d40b71e521944983", kill_on_drop: false }`
[INFO] [stdout] 1c221a1e510779266389ff8152baafb9af7271687da80666d40b71e521944983
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:5c16f4e6c37141f9fef0bc86f7a492d732943053e42aab8461035881e3f53823" "/opt/rustwide/cargo-home/bin/cargo" "+8d0c454bea9d9cc2cc7e288388f3b7d1da19c04f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 058c83738aeb5c2fb4644ccbb2af492a20bb6219a6f1c7595cb4744acdff5728
[INFO] running `Command { std: "docker" "start" "-a" "058c83738aeb5c2fb4644ccbb2af492a20bb6219a6f1c7595cb4744acdff5728", kill_on_drop: false }`
[INFO] [stderr]     Checking extreme v666.666.666666
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling async_fn-proc_macros v0.0.2
[INFO] [stderr]     Checking async_fn v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> tests/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         drop(it);
[INFO] [stdout]    |         ^^^^^--^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              argument has type `&()`
[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]   --> tests/main.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |         drop(it);
[INFO] [stdout]    |         ^^^^^--^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              argument has type `&()`
[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 [unoptimized + debuginfo] target(s) in 2.72s
[INFO] running `Command { std: "docker" "inspect" "058c83738aeb5c2fb4644ccbb2af492a20bb6219a6f1c7595cb4744acdff5728", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "058c83738aeb5c2fb4644ccbb2af492a20bb6219a6f1c7595cb4744acdff5728", kill_on_drop: false }`
[INFO] [stdout] 058c83738aeb5c2fb4644ccbb2af492a20bb6219a6f1c7595cb4744acdff5728
