[INFO] cloning repository https://github.com/robojeb/ibis
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/robojeb/ibis" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frobojeb%2Fibis", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frobojeb%2Fibis'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4963c348fbdedddbfe022abb8ce8a5109677f343
[INFO] building robojeb/ibis against try#8b8eff55bd72abbb57167bc42222a7f91d41cb0d for pr-142134-abi-ast-error
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frobojeb%2Fibis" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/robojeb/ibis on toolchain 8b8eff55bd72abbb57167bc42222a7f91d41cb0d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/robojeb/ibis
[INFO] finished tweaking git repo https://github.com/robojeb/ibis
[INFO] tweaked toml for git repo https://github.com/robojeb/ibis written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/robojeb/ibis 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" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded nix v0.21.0
[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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d0d231689225450d1a087383e01b5936afe5aa6662bdc2f8840bff2cc893f105
[INFO] running `Command { std: "docker" "start" "-a" "d0d231689225450d1a087383e01b5936afe5aa6662bdc2f8840bff2cc893f105", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d0d231689225450d1a087383e01b5936afe5aa6662bdc2f8840bff2cc893f105", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0d231689225450d1a087383e01b5936afe5aa6662bdc2f8840bff2cc893f105", kill_on_drop: false }`
[INFO] [stdout] d0d231689225450d1a087383e01b5936afe5aa6662bdc2f8840bff2cc893f105
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6cf3df8c7902fb14c2d93a2430c259a58bc433196fd0659c1148a0be1035f8ee
[INFO] running `Command { std: "docker" "start" "-a" "6cf3df8c7902fb14c2d93a2430c259a58bc433196fd0659c1148a0be1035f8ee", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling ibish v0.1.0 (/opt/rustwide/workdir/src/ibish)
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling nix v0.21.0
[INFO] [stderr]    Compiling init v0.1.0 (/opt/rustwide/workdir/src/init)
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]   --> src/init/src/shutdown.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 |     if let Err(_error) = nix::sys::reboot::reboot(nix::sys::reboot::RebootMode::RB_POWER_OFF) {
[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 6.38s
[INFO] running `Command { std: "docker" "inspect" "6cf3df8c7902fb14c2d93a2430c259a58bc433196fd0659c1148a0be1035f8ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cf3df8c7902fb14c2d93a2430c259a58bc433196fd0659c1148a0be1035f8ee", kill_on_drop: false }`
[INFO] [stdout] 6cf3df8c7902fb14c2d93a2430c259a58bc433196fd0659c1148a0be1035f8ee
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 351a0861972f28d714287af82c01543ffbd225b34cad71740cb0bb9d855e09f1
[INFO] running `Command { std: "docker" "start" "-a" "351a0861972f28d714287af82c01543ffbd225b34cad71740cb0bb9d855e09f1", kill_on_drop: false }`
[INFO] [stderr]    Compiling ibish v0.1.0 (/opt/rustwide/workdir/src/ibish)
[INFO] [stderr]    Compiling init v0.1.0 (/opt/rustwide/workdir/src/init)
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]   --> src/init/src/shutdown.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 |     if let Err(_error) = nix::sys::reboot::reboot(nix::sys::reboot::RebootMode::RB_POWER_OFF) {
[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 `test` profile [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "351a0861972f28d714287af82c01543ffbd225b34cad71740cb0bb9d855e09f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "351a0861972f28d714287af82c01543ffbd225b34cad71740cb0bb9d855e09f1", kill_on_drop: false }`
[INFO] [stdout] 351a0861972f28d714287af82c01543ffbd225b34cad71740cb0bb9d855e09f1