[INFO] cloning repository https://github.com/devnought/combine-test
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/devnought/combine-test" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdevnought%2Fcombine-test", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdevnought%2Fcombine-test'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e8ac868fca517438a93499fc7cf4f089e53e61e0
[INFO] checking devnought/combine-test against try#45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4 for pr-83744
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdevnought%2Fcombine-test" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/devnought/combine-test on toolchain 45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/devnought/combine-test
[INFO] finished tweaking git repo https://github.com/devnought/combine-test
[INFO] tweaked toml for git repo https://github.com/devnought/combine-test written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/devnought/combine-test already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "fetch" "--locked" "--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 proc-macro2 v0.4.29
[INFO] [stderr]   Downloaded syn v0.15.33
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9b00f8540cd42f1cb484ce9bdbb792dc77567fcb8582347e6e1ade207fbdca87
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9b00f8540cd42f1cb484ce9bdbb792dc77567fcb8582347e6e1ade207fbdca87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9b00f8540cd42f1cb484ce9bdbb792dc77567fcb8582347e6e1ade207fbdca87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b00f8540cd42f1cb484ce9bdbb792dc77567fcb8582347e6e1ade207fbdca87", kill_on_drop: false }`
[INFO] [stdout] 9b00f8540cd42f1cb484ce9bdbb792dc77567fcb8582347e6e1ade207fbdca87
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e031de0622bc9741faa0b220cadb7736a4c581a01b06df8f4d79eb21e41efffa
[INFO] running `Command { std: "docker" "start" "-a" "e031de0622bc9741faa0b220cadb7736a4c581a01b06df8f4d79eb21e41efffa", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.54
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]     Checking bitflags v1.0.4
[INFO] [stderr]    Compiling proc-macro2 v0.4.29
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling syn v0.15.33
[INFO] [stderr]     Checking combine v3.8.1
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling structopt-derive v0.2.15
[INFO] [stderr]     Checking structopt v0.2.15
[INFO] [stderr]     Checking combine-test v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `many1`, `many`, `satisfy`, `take_until_range`, `token`
[INFO] [stdout]   --> src/main.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 8  |     many, many1,
[INFO] [stdout]    |     ^^^^  ^^^^^
[INFO] [stdout] 9  |     range::{range, take_until_range, take_while, take_while1},
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 10 |     satisfy, skip_many, skip_many1,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 11 |     stream::state::State,
[INFO] [stdout] 12 |     token, ParseError, Parser, RangeStream,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `many1`, `many`, `satisfy`, `take_until_range`, `token`
[INFO] [stdout]   --> src/main.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 8  |     many, many1,
[INFO] [stdout]    |     ^^^^  ^^^^^
[INFO] [stdout] 9  |     range::{range, take_until_range, take_while, take_while1},
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 10 |     satisfy, skip_many, skip_many1,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 11 |     stream::state::State,
[INFO] [stdout] 12 |     token, ParseError, Parser, RangeStream,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     dbg!(res);
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     dbg!(res);
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.35s
[INFO] running `Command { std: "docker" "inspect" "e031de0622bc9741faa0b220cadb7736a4c581a01b06df8f4d79eb21e41efffa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e031de0622bc9741faa0b220cadb7736a4c581a01b06df8f4d79eb21e41efffa", kill_on_drop: false }`
[INFO] [stdout] e031de0622bc9741faa0b220cadb7736a4c581a01b06df8f4d79eb21e41efffa