[INFO] fetching crate yield-iter 0.2.1...
[INFO] testing yield-iter-0.2.1 against try#b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b for pr-145330-1
[INFO] extracting crate yield-iter 0.2.1 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate yield-iter 0.2.1
[INFO] finished tweaking crates.io crate yield-iter 0.2.1
[INFO] tweaked toml for crates.io crate yield-iter 0.2.1 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate yield-iter 0.2.1 on toolchain b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "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" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 64 packages to latest compatible versions
[INFO] [stderr]       Adding criterion v0.3.6 (available: v0.7.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7ad2ed87c2e17f9d77b672424bde424b8382054b757686699eb9cb50ed7a3e44
[INFO] running `Command { std: "docker" "start" "-a" "7ad2ed87c2e17f9d77b672424bde424b8382054b757686699eb9cb50ed7a3e44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7ad2ed87c2e17f9d77b672424bde424b8382054b757686699eb9cb50ed7a3e44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ad2ed87c2e17f9d77b672424bde424b8382054b757686699eb9cb50ed7a3e44", kill_on_drop: false }`
[INFO] [stdout] 7ad2ed87c2e17f9d77b672424bde424b8382054b757686699eb9cb50ed7a3e44
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d7bac01c7e6afa3d8b06af31077e062924b11809765d34890a6c9acf07d407c6
[INFO] running `Command { std: "docker" "start" "-a" "d7bac01c7e6afa3d8b06af31077e062924b11809765d34890a6c9acf07d407c6", kill_on_drop: false }`
[INFO] [stderr]    Compiling yield-iter v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved imports `std::ops::Generator`, `std::ops::GeneratorState`
[INFO] [stdout]  --> src/lib.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 |     ops::{Generator, GeneratorState},
[INFO] [stdout]   |           ^^^^^^^^^  ^^^^^^^^^^^^^^ no `GeneratorState` in `ops`
[INFO] [stdout]   |           |
[INFO] [stdout]   |           no `Generator` in `ops`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::LinkedList`
[INFO] [stdout]  --> src/lib.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::collections::LinkedList;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `generator_trait`
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(generator_trait)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `yield-iter` (lib) due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "d7bac01c7e6afa3d8b06af31077e062924b11809765d34890a6c9acf07d407c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7bac01c7e6afa3d8b06af31077e062924b11809765d34890a6c9acf07d407c6", kill_on_drop: false }`
[INFO] [stdout] d7bac01c7e6afa3d8b06af31077e062924b11809765d34890a6c9acf07d407c6