[INFO] fetching crate loopable 0.1.0...
[INFO] testing loopable-0.1.0 against beta-2021-09-12 for beta-1.56-2
[INFO] extracting crate loopable 0.1.0 into /workspace/builds/worker-78/source
[INFO] validating manifest of crates.io crate loopable 0.1.0 on toolchain beta-2021-09-12
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-12" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate loopable 0.1.0
[INFO] finished tweaking crates.io crate loopable 0.1.0
[INFO] tweaked toml for crates.io crate loopable 0.1.0 written to /workspace/builds/worker-78/source/Cargo.toml
[INFO] crate crates.io crate loopable 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-12" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-12" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ddf8e562f0157bf23f8cc1488dd6cb30dc856344a9f6248104de1af06a9a9b36
[INFO] running `Command { std: "docker" "start" "-a" "ddf8e562f0157bf23f8cc1488dd6cb30dc856344a9f6248104de1af06a9a9b36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ddf8e562f0157bf23f8cc1488dd6cb30dc856344a9f6248104de1af06a9a9b36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ddf8e562f0157bf23f8cc1488dd6cb30dc856344a9f6248104de1af06a9a9b36", kill_on_drop: false }`
[INFO] [stdout] ddf8e562f0157bf23f8cc1488dd6cb30dc856344a9f6248104de1af06a9a9b36
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-12" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2ee97f792f28a41c81c0d76bcd59a6e0b9f6769b6a9fa0dfb2cc6ca83faa3cef
[INFO] running `Command { std: "docker" "start" "-a" "2ee97f792f28a41c81c0d76bcd59a6e0b9f6769b6a9fa0dfb2cc6ca83faa3cef", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling loopable v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/gen_range.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn new(start: T, stop: T, step: T) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_c`
[INFO] [stdout]   --> src/main.rs:42:4
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn print_c<I: Iterator<Item=String>>(v:I) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.54s
[INFO] running `Command { std: "docker" "inspect" "2ee97f792f28a41c81c0d76bcd59a6e0b9f6769b6a9fa0dfb2cc6ca83faa3cef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ee97f792f28a41c81c0d76bcd59a6e0b9f6769b6a9fa0dfb2cc6ca83faa3cef", kill_on_drop: false }`
[INFO] [stdout] 2ee97f792f28a41c81c0d76bcd59a6e0b9f6769b6a9fa0dfb2cc6ca83faa3cef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-12" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bfc21a4bcfdf188222ad23be7b153f85f2dbbfd3b390958ed4b9469802f9a33b
[INFO] running `Command { std: "docker" "start" "-a" "bfc21a4bcfdf188222ad23be7b153f85f2dbbfd3b390958ed4b9469802f9a33b", kill_on_drop: false }`
[INFO] [stderr]    Compiling loopable v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/gen_range.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn new(start: T, stop: T, step: T) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_c`
[INFO] [stdout]   --> src/main.rs:42:4
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn print_c<I: Iterator<Item=String>>(v:I) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0034]: multiple applicable items in scope
[INFO] [stdout]   --> src/combi.rs:95:42
[INFO] [stdout]    |
[INFO] [stdout] 95 |         let v : Vec<&str> = s.split(" ").intersperse(",").collect();
[INFO] [stdout]    |                                          ^^^^^^^^^^^ multiple `intersperse` found
[INFO] [stdout]    |
[INFO] [stdout]    = note: candidate #1 is defined in an impl of the trait `Iterator` for the type `std::str::Split<'a, P>`
[INFO] [stdout]    = note: candidate #2 is defined in an impl of the trait `Itertools` for the type `T`
[INFO] [stdout] help: disambiguate the associated function for candidate #1
[INFO] [stdout]    |
[INFO] [stdout] 95 |         let v : Vec<&str> = Iterator::intersperse(s.split(" "), ",").collect();
[INFO] [stdout]    |                             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] help: disambiguate the associated function for candidate #2
[INFO] [stdout]    |
[INFO] [stdout] 95 |         let v : Vec<&str> = Itertools::intersperse(s.split(" "), ",").collect();
[INFO] [stdout]    |                             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0034`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `loopable` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "bfc21a4bcfdf188222ad23be7b153f85f2dbbfd3b390958ed4b9469802f9a33b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bfc21a4bcfdf188222ad23be7b153f85f2dbbfd3b390958ed4b9469802f9a33b", kill_on_drop: false }`
[INFO] [stdout] bfc21a4bcfdf188222ad23be7b153f85f2dbbfd3b390958ed4b9469802f9a33b