[INFO] fetching crate d2_iterators_rychan14 0.1.0...
[INFO] checking d2_iterators_rychan14-0.1.0 against try#07fecb9cf34c4979a772ba38c99d6d9144768413 for pr-87710
[INFO] extracting crate d2_iterators_rychan14 0.1.0 into /workspace/builds/worker-56/source
[INFO] validating manifest of crates.io crate d2_iterators_rychan14 0.1.0 on toolchain 07fecb9cf34c4979a772ba38c99d6d9144768413
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate d2_iterators_rychan14 0.1.0
[INFO] finished tweaking crates.io crate d2_iterators_rychan14 0.1.0
[INFO] tweaked toml for crates.io crate d2_iterators_rychan14 0.1.0 written to /workspace/builds/worker-56/source/Cargo.toml
[INFO] crate crates.io crate d2_iterators_rychan14 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e648138aecbae83d6ff0ad7b0ae82d6c7f69e27c87dd74f7ab5e30105fda3482
[INFO] running `Command { std: "docker" "start" "-a" "e648138aecbae83d6ff0ad7b0ae82d6c7f69e27c87dd74f7ab5e30105fda3482", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e648138aecbae83d6ff0ad7b0ae82d6c7f69e27c87dd74f7ab5e30105fda3482", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e648138aecbae83d6ff0ad7b0ae82d6c7f69e27c87dd74f7ab5e30105fda3482", kill_on_drop: false }`
[INFO] [stdout] e648138aecbae83d6ff0ad7b0ae82d6c7f69e27c87dd74f7ab5e30105fda3482
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ffd6d7ca5fe20d2cfda8f160f4a6567421b1ab1d3f8b2068e57f621055de7c2a
[INFO] running `Command { std: "docker" "start" "-a" "ffd6d7ca5fe20d2cfda8f160f4a6567421b1ab1d3f8b2068e57f621055de7c2a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking d2_iterators_rychan14 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]   --> src/combi.rs:49:41
[INFO] [stdout]    |
[INFO] [stdout] 49 |         let v: Vec<&str> = s.split(" ").intersperse(",").collect();
[INFO] [stdout]    |                                         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]    = help: call with fully qualified syntax `itertools::Itertools::intersperse(...)` to keep using the current method
[INFO] [stdout]    = help: add `#![feature(iter_intersperse)]` to the crate attributes to enable `std::iter::Iterator::intersperse`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.76s
[INFO] running `Command { std: "docker" "inspect" "ffd6d7ca5fe20d2cfda8f160f4a6567421b1ab1d3f8b2068e57f621055de7c2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ffd6d7ca5fe20d2cfda8f160f4a6567421b1ab1d3f8b2068e57f621055de7c2a", kill_on_drop: false }`
[INFO] [stdout] ffd6d7ca5fe20d2cfda8f160f4a6567421b1ab1d3f8b2068e57f621055de7c2a