[INFO] fetching crate seek-ext 0.1.0...
[INFO] checking seek-ext-0.1.0 against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] extracting crate seek-ext 0.1.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate seek-ext 0.1.0 on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate seek-ext 0.1.0
[INFO] finished tweaking crates.io crate seek-ext 0.1.0
[INFO] tweaked toml for crates.io crate seek-ext 0.1.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9dd64395482bd7e489d5e15768e968a3be2622b380307e868aeedb87c709c7fa
[INFO] running `Command { std: "docker" "start" "-a" "9dd64395482bd7e489d5e15768e968a3be2622b380307e868aeedb87c709c7fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9dd64395482bd7e489d5e15768e968a3be2622b380307e868aeedb87c709c7fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9dd64395482bd7e489d5e15768e968a3be2622b380307e868aeedb87c709c7fa", kill_on_drop: false }`
[INFO] [stdout] 9dd64395482bd7e489d5e15768e968a3be2622b380307e868aeedb87c709c7fa
[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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 776b4eecd1d933d29fcd24f172566a4734c893b7c18cec91f7388cc47fd34620
[INFO] running `Command { std: "docker" "start" "-a" "776b4eecd1d933d29fcd24f172566a4734c893b7c18cec91f7388cc47fd34620", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking seek-ext 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/lib.rs:86:22
[INFO] [stdout]    |
[INFO] [stdout] 86 |         assert_eq!(c.stream_len().unwrap(), 15);
[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 `SeekExt::stream_len(...)` to keep using the current method
[INFO] [stdout]    = help: add `#![feature(seek_stream_len)]` to the crate attributes to enable `std::io::Seek::stream_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]   --> src/lib.rs:90:22
[INFO] [stdout]    |
[INFO] [stdout] 90 |         assert_eq!(c.stream_len().unwrap(), 15);
[INFO] [stdout]    |                      ^^^^^^^^^^
[INFO] [stdout]    |
[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 `SeekExt::stream_len(...)` to keep using the current method
[INFO] [stdout]    = help: add `#![feature(seek_stream_len)]` to the crate attributes to enable `std::io::Seek::stream_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]   --> src/lib.rs:96:22
[INFO] [stdout]    |
[INFO] [stdout] 96 |         assert_eq!(c.stream_len().unwrap(), 15);
[INFO] [stdout]    |                      ^^^^^^^^^^
[INFO] [stdout]    |
[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 `SeekExt::stream_len(...)` to keep using the current method
[INFO] [stdout]    = help: add `#![feature(seek_stream_len)]` to the crate attributes to enable `std::io::Seek::stream_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.74s
[INFO] running `Command { std: "docker" "inspect" "776b4eecd1d933d29fcd24f172566a4734c893b7c18cec91f7388cc47fd34620", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "776b4eecd1d933d29fcd24f172566a4734c893b7c18cec91f7388cc47fd34620", kill_on_drop: false }`
[INFO] [stdout] 776b4eecd1d933d29fcd24f172566a4734c893b7c18cec91f7388cc47fd34620