[INFO] fetching crate minesweeprs 0.3.4...
[INFO] testing minesweeprs-0.3.4 against 1.90.0 for beta-1.91-3
[INFO] extracting crate minesweeprs 0.3.4 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate minesweeprs 0.3.4
[INFO] finished tweaking crates.io crate minesweeprs 0.3.4
[INFO] tweaked toml for crates.io crate minesweeprs 0.3.4 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate minesweeprs 0.3.4 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "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" "+1.90.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 14 packages to latest compatible versions
[INFO] [stderr]       Adding itertools v0.10.5 (available: v0.14.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded frozenset v0.2.2
[INFO] [stderr]   Downloaded typed-arena v2.0.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ad863129fbb1b6134bee4bcd80adc312218319342acc0dd20809821a18325395
[INFO] running `Command { std: "docker" "start" "-a" "ad863129fbb1b6134bee4bcd80adc312218319342acc0dd20809821a18325395", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ad863129fbb1b6134bee4bcd80adc312218319342acc0dd20809821a18325395", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad863129fbb1b6134bee4bcd80adc312218319342acc0dd20809821a18325395", kill_on_drop: false }`
[INFO] [stdout] ad863129fbb1b6134bee4bcd80adc312218319342acc0dd20809821a18325395
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=warn" "-e" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 43689e97eb362aa0074bdddccd026dfb5879dacfc87cea0628633d078383215f
[INFO] running `Command { std: "docker" "start" "-a" "43689e97eb362aa0074bdddccd026dfb5879dacfc87cea0628633d078383215f", kill_on_drop: false }`
[INFO] [stderr]    Compiling diff v0.1.13
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling frozenset v0.2.2
[INFO] [stderr]    Compiling typed-arena v2.0.2
[INFO] [stderr]    Compiling pretty_assertions v1.4.1
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling minesweeprs v0.3.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(generators, generator_trait)]
[INFO] [stdout]   |            ^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: removed in 1.75.0; see <https://github.com/rust-lang/rust/pull/116958> for more information
[INFO] [stdout]   = note: renamed to `coroutines`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved imports `std::ops::Generator`, `std::ops::GeneratorState`
[INFO] [stdout]  --> src/solve/types.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::ops::{Generator, GeneratorState};
[INFO] [stdout]   |                ^^^^^^^^^  ^^^^^^^^^^^^^^ no `GeneratorState` in `ops`
[INFO] [stdout]   |                |
[INFO] [stdout]   |                no `Generator` in `ops`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(generators, generator_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: yield syntax is experimental
[INFO] [stdout]     --> src/solve/types.rs:1196:21
[INFO] [stdout]      |
[INFO] [stdout] 1196 | /                     yield state.mine_config().expect(
[INFO] [stdout] 1197 | |                         "Mine configuration should always be valid when \
[INFO] [stdout] 1198 | |                          state.is_complete()",
[INFO] [stdout] 1199 | |                     );
[INFO] [stdout]      | |_____________________^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #43122 <https://github.com/rust-lang/rust/issues/43122> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: yield syntax is experimental
[INFO] [stdout]     --> src/solve/types.rs:1204:29
[INFO] [stdout]      |
[INFO] [stdout] 1204 | ...                   yield val;
[INFO] [stdout]      |                       ^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #43122 <https://github.com/rust-lang/rust/issues/43122> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: yield syntax is experimental
[INFO] [stdout]     --> src/solve/types.rs:1196:21
[INFO] [stdout]      |
[INFO] [stdout] 1196 | /                     yield state.mine_config().expect(
[INFO] [stdout] 1197 | |                         "Mine configuration should always be valid when \
[INFO] [stdout] 1198 | |                          state.is_complete()",
[INFO] [stdout] 1199 | |                     );
[INFO] [stdout]      | |_____________________^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #43122 <https://github.com/rust-lang/rust/issues/43122> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: `yield` can only be used in `#[coroutine]` closures, or `gen` blocks
[INFO] [stdout]     --> src/solve/types.rs:1196:21
[INFO] [stdout]      |
[INFO] [stdout] 1196 | /                     yield state.mine_config().expect(
[INFO] [stdout] 1197 | |                         "Mine configuration should always be valid when \
[INFO] [stdout] 1198 | |                          state.is_complete()",
[INFO] [stdout] 1199 | |                     );
[INFO] [stdout]      | |_____________________^
[INFO] [stdout]      |
[INFO] [stdout] help: use `#[coroutine]` to make this closure a coroutine
[INFO] [stdout]      |
[INFO] [stdout] 1194 |             inner: Box::pin(#[coroutine] static move || {
[INFO] [stdout]      |                             ++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: yield syntax is experimental
[INFO] [stdout]     --> src/solve/types.rs:1204:29
[INFO] [stdout]      |
[INFO] [stdout] 1204 | ...                   yield val;
[INFO] [stdout]      |                       ^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #43122 <https://github.com/rust-lang/rust/issues/43122> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `generator_trait`
[INFO] [stdout]  --> src/lib.rs:1:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(generators, generator_trait)]
[INFO] [stdout]   |                        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0554, E0557, E0635, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `minesweeprs` (lib) due to 9 previous errors
[INFO] running `Command { std: "docker" "inspect" "43689e97eb362aa0074bdddccd026dfb5879dacfc87cea0628633d078383215f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43689e97eb362aa0074bdddccd026dfb5879dacfc87cea0628633d078383215f", kill_on_drop: false }`
[INFO] [stdout] 43689e97eb362aa0074bdddccd026dfb5879dacfc87cea0628633d078383215f
