[INFO] fetching crate process_hollowing 1.12.0...
[INFO] checking process_hollowing-1.12.0 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate process_hollowing 1.12.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate process_hollowing 1.12.0
[INFO] finished tweaking crates.io crate process_hollowing 1.12.0
[INFO] tweaked toml for crates.io crate process_hollowing 1.12.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate process_hollowing 1.12.0 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate process_hollowing 1.12.0 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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cc8dfd14dbc286f379b36c3e515537315d565890e1f4afe443d80a5f3696d654
[INFO] running `Command { std: "docker" "start" "-a" "cc8dfd14dbc286f379b36c3e515537315d565890e1f4afe443d80a5f3696d654", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc8dfd14dbc286f379b36c3e515537315d565890e1f4afe443d80a5f3696d654", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc8dfd14dbc286f379b36c3e515537315d565890e1f4afe443d80a5f3696d654", kill_on_drop: false }`
[INFO] [stdout] cc8dfd14dbc286f379b36c3e515537315d565890e1f4afe443d80a5f3696d654
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9fdcc1965f2185434e441571a870008af9311d763ffb83ca2851173d44f7060d
[INFO] running `Command { std: "docker" "start" "-a" "9fdcc1965f2185434e441571a870008af9311d763ffb83ca2851173d44f7060d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]    Compiling cfg_aliases v0.2.1
[INFO] [stderr]     Checking rco_config v0.3.0
[INFO] [stderr]     Checking rco_utils v1.3.0
[INFO] [stderr]    Compiling nix v0.29.0
[INFO] [stderr]     Checking process_hollowing v1.12.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]   --> src/process_hollowing_linux.rs:49:16
[INFO] [stdout]    |
[INFO] [stdout] 49 |             if let Err(error) = execv(&executable, arguments) {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]    = help: consider replacing the `if let` with a `let`
[INFO] [stdout]    = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]   --> src/process_hollowing_linux.rs:49:16
[INFO] [stdout]    |
[INFO] [stdout] 49 |             if let Err(error) = execv(&executable, arguments) {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]    = help: consider replacing the `if let` with a `let`
[INFO] [stdout]    = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.99s
[INFO] running `Command { std: "docker" "inspect" "9fdcc1965f2185434e441571a870008af9311d763ffb83ca2851173d44f7060d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9fdcc1965f2185434e441571a870008af9311d763ffb83ca2851173d44f7060d", kill_on_drop: false }`
[INFO] [stdout] 9fdcc1965f2185434e441571a870008af9311d763ffb83ca2851173d44f7060d