[INFO] fetching crate memfd-exec 0.2.1...
[INFO] checking memfd-exec-0.2.1 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate memfd-exec 0.2.1 into /workspace/builds/worker-3-tc2/source
[INFO] removed /workspace/builds/worker-3-tc2/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate memfd-exec 0.2.1
[INFO] finished tweaking crates.io crate memfd-exec 0.2.1
[INFO] tweaked toml for crates.io crate memfd-exec 0.2.1 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate memfd-exec 0.2.1 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 170 packages to latest compatible versions
[INFO] [stderr]       Adding nix v0.26.4 (available: v0.30.1)
[INFO] [stderr]       Adding reqwest v0.11.27 (available: v0.12.24)
[INFO] [stderr]       Adding serial_test v2.0.0 (available: v3.2.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fb7cd04ada55829fc63bef68d43c56b7ab78a6f2e5431d375f25a6b979fb5e7e
[INFO] running `Command { std: "docker" "start" "-a" "fb7cd04ada55829fc63bef68d43c56b7ab78a6f2e5431d375f25a6b979fb5e7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fb7cd04ada55829fc63bef68d43c56b7ab78a6f2e5431d375f25a6b979fb5e7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb7cd04ada55829fc63bef68d43c56b7ab78a6f2e5431d375f25a6b979fb5e7e", kill_on_drop: false }`
[INFO] [stdout] fb7cd04ada55829fc63bef68d43c56b7ab78a6f2e5431d375f25a6b979fb5e7e
[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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 16b1f2addb630a2a229ce7292fcd0a2256d12aeccacc3031ab4431244bcab15b
[INFO] running `Command { std: "docker" "start" "-a" "16b1f2addb630a2a229ce7292fcd0a2256d12aeccacc3031ab4431244bcab15b", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-util v0.3.31
[INFO] [stderr]     Checking tokio v1.48.0
[INFO] [stderr]     Checking openssl-sys v0.9.111
[INFO] [stderr]    Compiling memoffset v0.7.1
[INFO] [stderr]     Checking parking_lot_core v0.9.12
[INFO] [stderr]    Compiling serial_test_derive v2.0.0
[INFO] [stderr]     Checking rustix v1.1.2
[INFO] [stderr]     Checking parking_lot v0.12.5
[INFO] [stderr]     Checking dashmap v5.5.3
[INFO] [stderr]     Checking nix v0.26.4
[INFO] [stderr]     Checking tempfile v3.23.0
[INFO] [stderr]     Checking futures-executor v0.3.31
[INFO] [stderr]     Checking openssl v0.10.75
[INFO] [stderr]     Checking futures v0.3.31
[INFO] [stderr]     Checking serial_test v2.0.0
[INFO] [stderr]     Checking tokio-util v0.7.17
[INFO] [stderr]     Checking h2 v0.3.27
[INFO] [stderr]     Checking memfd-exec v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]    --> src/executable.rs:571:12
[INFO] [stdout]     |
[INFO] [stdout] 571 |         if let Err(err) = fexecve(mfd, &argv, &envp) {
[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: struct `CommandEnvs` is never constructed
[INFO] [stdout]   --> src/command_env.rs:83:12
[INFO] [stdout]    |
[INFO] [stdout] 83 | pub struct CommandEnvs<'a> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i32, Infallible>
[INFO] [stdout]   --> src/process.rs:93:15
[INFO] [stdout]    |
[INFO] [stdout] 93 |         match c_int::try_from(self.0) {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `memfd-exec` (lib) due to 1 previous error; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "16b1f2addb630a2a229ce7292fcd0a2256d12aeccacc3031ab4431244bcab15b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16b1f2addb630a2a229ce7292fcd0a2256d12aeccacc3031ab4431244bcab15b", kill_on_drop: false }`
[INFO] [stdout] 16b1f2addb630a2a229ce7292fcd0a2256d12aeccacc3031ab4431244bcab15b