[INFO] fetching crate simple_generators 0.2.1...
[INFO] checking simple_generators-0.2.1 against 1.95.0 for pr-155915
[INFO] extracting crate simple_generators 0.2.1 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate simple_generators 0.2.1
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate simple_generators 0.2.1
[INFO] tweaked toml for crates.io crate simple_generators 0.2.1 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate simple_generators 0.2.1 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate simple_generators 0.2.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded simple_generators_adapter v0.2.1
[INFO] [stderr]   Downloaded simple_generators_macros v0.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4b748fb1d31433e6ce295ec08076e8a46fec9ffac376a622a35748ff93958951
[INFO] running `Command { std: "docker" "start" "-a" "4b748fb1d31433e6ce295ec08076e8a46fec9ffac376a622a35748ff93958951", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4b748fb1d31433e6ce295ec08076e8a46fec9ffac376a622a35748ff93958951", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b748fb1d31433e6ce295ec08076e8a46fec9ffac376a622a35748ff93958951", kill_on_drop: false }`
[INFO] [stdout] 4b748fb1d31433e6ce295ec08076e8a46fec9ffac376a622a35748ff93958951
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0ae88126e5cf9c675c23f656f284f3b2046ddc7b73a7ff0676d9e80b416d3f0a
[INFO] running `Command { std: "docker" "start" "-a" "0ae88126e5cf9c675c23f656f284f3b2046ddc7b73a7ff0676d9e80b416d3f0a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.105
[INFO] [stderr]    Compiling simple_generators_adapter v0.2.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/simple_generators_adapter-0.2.1/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/simple_generators_adapter-0.2.1/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `simple_generators_adapter` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `simple_generators_adapter` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "0ae88126e5cf9c675c23f656f284f3b2046ddc7b73a7ff0676d9e80b416d3f0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ae88126e5cf9c675c23f656f284f3b2046ddc7b73a7ff0676d9e80b416d3f0a", kill_on_drop: false }`
[INFO] [stdout] 0ae88126e5cf9c675c23f656f284f3b2046ddc7b73a7ff0676d9e80b416d3f0a