[INFO] fetching crate subprocess 0.2.9...
[INFO] checking subprocess-0.2.9 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate subprocess 0.2.9 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate subprocess 0.2.9 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 subprocess 0.2.9
[INFO] finished tweaking crates.io crate subprocess 0.2.9
[INFO] tweaked toml for crates.io crate subprocess 0.2.9 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate crates.io crate subprocess 0.2.9 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" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] afabacdc072e08a5b7042b3ec8ad33cea2cf51669a97a77537a5537e5ab04887
[INFO] running `Command { std: "docker" "start" "-a" "afabacdc072e08a5b7042b3ec8ad33cea2cf51669a97a77537a5537e5ab04887", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "afabacdc072e08a5b7042b3ec8ad33cea2cf51669a97a77537a5537e5ab04887", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "afabacdc072e08a5b7042b3ec8ad33cea2cf51669a97a77537a5537e5ab04887", kill_on_drop: false }`
[INFO] [stdout] afabacdc072e08a5b7042b3ec8ad33cea2cf51669a97a77537a5537e5ab04887
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 61ad8e33851d6826825a82a32d4b612aad95c3937ae1e51f748d5f144d54d093
[INFO] running `Command { std: "docker" "start" "-a" "61ad8e33851d6826825a82a32d4b612aad95c3937ae1e51f748d5f144d54d093", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.125
[INFO] [stderr]     Checking remove_dir_all v0.5.2
[INFO] [stderr]     Checking fastrand v1.7.0
[INFO] [stderr]     Checking tempfile v3.3.0
[INFO] [stderr]     Checking subprocess v0.2.9 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `self::os::*`
[INFO] [stdout]   --> src/builder.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub use self::os::*;
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `exec::unix`
[INFO] [stdout]   --> src/builder.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub use exec::unix;
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ENOSPC`
[INFO] [stdout]   --> src/posix.rs:18:24
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub use libc::{ECHILD, ENOSPC};
[INFO] [stdout]    |                        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `POLLERR`, `POLLNVAL`, and `POLLPRI`
[INFO] [stdout]    --> src/posix.rs:375:16
[INFO] [stdout]     |
[INFO] [stdout] 375 | pub use libc::{POLLERR, POLLHUP, POLLIN, POLLNVAL, POLLOUT, POLLPRI};
[INFO] [stdout]     |                ^^^^^^^                   ^^^^^^^^           ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::os::*`
[INFO] [stdout]   --> src/builder.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub use self::os::*;
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `exec::unix`
[INFO] [stdout]   --> src/builder.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub use exec::unix;
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ENOSPC`
[INFO] [stdout]   --> src/posix.rs:18:24
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub use libc::{ECHILD, ENOSPC};
[INFO] [stdout]    |                        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `POLLERR`, `POLLNVAL`, and `POLLPRI`
[INFO] [stdout]    --> src/posix.rs:375:16
[INFO] [stdout]     |
[INFO] [stdout] 375 | pub use libc::{POLLERR, POLLHUP, POLLIN, POLLNVAL, POLLOUT, POLLPRI};
[INFO] [stdout]     |                ^^^^^^^                   ^^^^^^^^           ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `setuid` and `setgid` are never used
[INFO] [stdout]    --> src/builder.rs:708:16
[INFO] [stdout]     |
[INFO] [stdout] 707 |         pub trait ExecExt {
[INFO] [stdout]     |                   ------- methods in this trait
[INFO] [stdout] 708 |             fn setuid(self, uid: u32) -> Self;
[INFO] [stdout]     |                ^^^^^^
[INFO] [stdout] 709 |             fn setgid(self, gid: u32) -> Self;
[INFO] [stdout]     |                ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `setuid` and `setgid` are never used
[INFO] [stdout]    --> src/builder.rs:708:16
[INFO] [stdout]     |
[INFO] [stdout] 707 |         pub trait ExecExt {
[INFO] [stdout]     |                   ------- methods in this trait
[INFO] [stdout] 708 |             fn setuid(self, uid: u32) -> Self;
[INFO] [stdout]     |                ^^^^^^
[INFO] [stdout] 709 |             fn setgid(self, gid: u32) -> Self;
[INFO] [stdout]     |                ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.71s
[INFO] running `Command { std: "docker" "inspect" "61ad8e33851d6826825a82a32d4b612aad95c3937ae1e51f748d5f144d54d093", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61ad8e33851d6826825a82a32d4b612aad95c3937ae1e51f748d5f144d54d093", kill_on_drop: false }`
[INFO] [stdout] 61ad8e33851d6826825a82a32d4b612aad95c3937ae1e51f748d5f144d54d093