[INFO] fetching crate rexpect 0.5.0...
[INFO] checking rexpect-0.5.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate rexpect 0.5.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate rexpect 0.5.0 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rexpect 0.5.0
[INFO] finished tweaking crates.io crate rexpect 0.5.0
[INFO] tweaked toml for crates.io crate rexpect 0.5.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate crates.io crate rexpect 0.5.0 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded thiserror-impl v1.0.34
[INFO] [stderr]   Downloaded comma v1.0.0
[INFO] [stderr]   Downloaded thiserror v1.0.34
[INFO] [stderr]   Downloaded proc-macro2 v1.0.43
[INFO] [stderr]   Downloaded quote v1.0.21
[INFO] [stderr]   Downloaded unicode-ident v1.0.3
[INFO] [stderr]   Downloaded nix v0.25.0
[INFO] [stderr]   Downloaded syn v1.0.99
[INFO] [stderr]   Downloaded libc v0.2.132
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aa3645bed158cf6c94ea9ff9fdf9dfa02168cdbdfbd782610992f7982c5c4fa3
[INFO] running `Command { std: "docker" "start" "-a" "aa3645bed158cf6c94ea9ff9fdf9dfa02168cdbdfbd782610992f7982c5c4fa3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aa3645bed158cf6c94ea9ff9fdf9dfa02168cdbdfbd782610992f7982c5c4fa3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa3645bed158cf6c94ea9ff9fdf9dfa02168cdbdfbd782610992f7982c5c4fa3", kill_on_drop: false }`
[INFO] [stdout] aa3645bed158cf6c94ea9ff9fdf9dfa02168cdbdfbd782610992f7982c5c4fa3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dc273fd2da7bdc80f31f72cca81f1a68bc6d069e6abd96ae0e60ee2921e8843e
[INFO] running `Command { std: "docker" "start" "-a" "dc273fd2da7bdc80f31f72cca81f1a68bc6d069e6abd96ae0e60ee2921e8843e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.43
[INFO] [stderr]    Compiling unicode-ident v1.0.3
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling libc v0.2.132
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]     Checking regex-syntax v0.6.27
[INFO] [stderr]     Checking fastrand v1.8.0
[INFO] [stderr]     Checking comma v1.0.0
[INFO] [stderr]     Checking aho-corasick v0.7.19
[INFO] [stderr]     Checking nix v0.25.0
[INFO] [stderr]     Checking tempfile v3.3.0
[INFO] [stderr]     Checking regex v1.6.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.34
[INFO] [stderr]     Checking thiserror v1.0.34
[INFO] [stderr]     Checking rexpect v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `nix` is imported redundantly
[INFO] [stdout]  --> src/process.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use nix;
[INFO] [stdout]   |     ^^^ the item `nix` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]   --> src/process.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std;
[INFO] [stdout]    |     ^^^ the item `std` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `tempfile` is imported redundantly
[INFO] [stdout]   --> src/session.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use tempfile;
[INFO] [stdout]    |     ^^^^^^^^ the item `tempfile` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `signal` is imported redundantly
[INFO] [stdout]    --> src/process.rs:236:20
[INFO] [stdout]     |
[INFO] [stdout] 235 |     use super::*;
[INFO] [stdout]     |         -------- the item `signal` is already imported here
[INFO] [stdout] 236 |     use nix::sys::{signal, wait};
[INFO] [stdout]     |                    ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `wait` is imported redundantly
[INFO] [stdout]    --> src/process.rs:236:28
[INFO] [stdout]     |
[INFO] [stdout] 235 |     use super::*;
[INFO] [stdout]     |         -------- the item `wait` is already imported here
[INFO] [stdout] 236 |     use nix::sys::{signal, wait};
[INFO] [stdout]     |                            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `tempfile` is imported redundantly
[INFO] [stdout]   --> src/session.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use tempfile;
[INFO] [stdout]    |     ^^^^^^^^ the item `tempfile` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.83s
[INFO] running `Command { std: "docker" "inspect" "dc273fd2da7bdc80f31f72cca81f1a68bc6d069e6abd96ae0e60ee2921e8843e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc273fd2da7bdc80f31f72cca81f1a68bc6d069e6abd96ae0e60ee2921e8843e", kill_on_drop: false }`
[INFO] [stdout] dc273fd2da7bdc80f31f72cca81f1a68bc6d069e6abd96ae0e60ee2921e8843e