[INFO] fetching crate seek-ext 0.1.0...
[INFO] building seek-ext-0.1.0 against master#ad85bc524b1ad696e42061ad8338d382dffbdbe5 for pr-146237-1
[INFO] extracting crate seek-ext 0.1.0 into /workspace/builds/worker-5-tc1/source
[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-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate seek-ext 0.1.0 on toolchain ad85bc524b1ad696e42061ad8338d382dffbdbe5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 256cb80dab22bdbf5d313e0aec08a884411111e30b3b943293bc301474a2bbac
[INFO] running `Command { std: "docker" "start" "-a" "256cb80dab22bdbf5d313e0aec08a884411111e30b3b943293bc301474a2bbac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "256cb80dab22bdbf5d313e0aec08a884411111e30b3b943293bc301474a2bbac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "256cb80dab22bdbf5d313e0aec08a884411111e30b3b943293bc301474a2bbac", kill_on_drop: false }`
[INFO] [stdout] 256cb80dab22bdbf5d313e0aec08a884411111e30b3b943293bc301474a2bbac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6aeef3ead617dde26ee3b4566366c3a9e906009cdc47b92750d91999ffb90d0a
[INFO] running `Command { std: "docker" "start" "-a" "6aeef3ead617dde26ee3b4566366c3a9e906009cdc47b92750d91999ffb90d0a", kill_on_drop: false }`
[INFO] [stderr]    Compiling seek-ext v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `Command { std: "docker" "inspect" "6aeef3ead617dde26ee3b4566366c3a9e906009cdc47b92750d91999ffb90d0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6aeef3ead617dde26ee3b4566366c3a9e906009cdc47b92750d91999ffb90d0a", kill_on_drop: false }`
[INFO] [stdout] 6aeef3ead617dde26ee3b4566366c3a9e906009cdc47b92750d91999ffb90d0a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6643e74cb5d2aad97ffaa9cf053e7e764914587975c053aca9597de00872dc2d
[INFO] running `Command { std: "docker" "start" "-a" "6643e74cb5d2aad97ffaa9cf053e7e764914587975c053aca9597de00872dc2d", kill_on_drop: false }`
[INFO] [stderr]    Compiling seek-ext v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: a method 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]    = 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]    = note: `#[warn(unstable_name_collisions)]` (part of `#[warn(future_incompatible)]`) on by default
[INFO] [stdout] help: add `#![feature(seek_stream_len)]` to the crate attributes to enable `std::io::Seek::stream_len`
[INFO] [stdout]    |
[INFO] [stdout]  4 + #![feature(seek_stream_len)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method 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]  4 + #![feature(seek_stream_len)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method 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]  4 + #![feature(seek_stream_len)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `Command { std: "docker" "inspect" "6643e74cb5d2aad97ffaa9cf053e7e764914587975c053aca9597de00872dc2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6643e74cb5d2aad97ffaa9cf053e7e764914587975c053aca9597de00872dc2d", kill_on_drop: false }`
[INFO] [stdout] 6643e74cb5d2aad97ffaa9cf053e7e764914587975c053aca9597de00872dc2d