[INFO] fetching crate nclosure 0.1.0...
[INFO] testing nclosure-0.1.0 against 1.91.0 for beta-1.92-2
[INFO] extracting crate nclosure 0.1.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate nclosure 0.1.0
[INFO] finished tweaking crates.io crate nclosure 0.1.0
[INFO] tweaked toml for crates.io crate nclosure 0.1.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate nclosure 0.1.0 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "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" "+1.91.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 1 package to latest compatible version
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded chain-trans v1.0.0
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e367a335d8d154eed4e8627f49818a781966ed5dea25951f9fd356202c6ad0d6
[INFO] running `Command { std: "docker" "start" "-a" "e367a335d8d154eed4e8627f49818a781966ed5dea25951f9fd356202c6ad0d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e367a335d8d154eed4e8627f49818a781966ed5dea25951f9fd356202c6ad0d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e367a335d8d154eed4e8627f49818a781966ed5dea25951f9fd356202c6ad0d6", kill_on_drop: false }`
[INFO] [stdout] e367a335d8d154eed4e8627f49818a781966ed5dea25951f9fd356202c6ad0d6
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8565b0b993d8daca31ad3c62df5cedaf146e91fa6db216708886a71709afce30
[INFO] running `Command { std: "docker" "start" "-a" "8565b0b993d8daca31ad3c62df5cedaf146e91fa6db216708886a71709afce30", kill_on_drop: false }`
[INFO] [stderr]    Compiling chain-trans v1.0.0
[INFO] [stderr]    Compiling nclosure v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `Command { std: "docker" "inspect" "8565b0b993d8daca31ad3c62df5cedaf146e91fa6db216708886a71709afce30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8565b0b993d8daca31ad3c62df5cedaf146e91fa6db216708886a71709afce30", kill_on_drop: false }`
[INFO] [stdout] 8565b0b993d8daca31ad3c62df5cedaf146e91fa6db216708886a71709afce30
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3f956a316063bb836c9c23351cb59be7c9552a48e63a5f2a957316ae9928b2a9
[INFO] running `Command { std: "docker" "start" "-a" "3f956a316063bb836c9c23351cb59be7c9552a48e63a5f2a957316ae9928b2a9", kill_on_drop: false }`
[INFO] [stderr]    Compiling nclosure v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.42s
[INFO] running `Command { std: "docker" "inspect" "3f956a316063bb836c9c23351cb59be7c9552a48e63a5f2a957316ae9928b2a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f956a316063bb836c9c23351cb59be7c9552a48e63a5f2a957316ae9928b2a9", kill_on_drop: false }`
[INFO] [stdout] 3f956a316063bb836c9c23351cb59be7c9552a48e63a5f2a957316ae9928b2a9
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4e66b40e58761b1a7b40afc6373f69df9c3f8c0e13bfa558f2ce5df125cb6e02
[INFO] running `Command { std: "docker" "start" "-a" "4e66b40e58761b1a7b40afc6373f69df9c3f8c0e13bfa558f2ce5df125cb6e02", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/nclosure-c24df6055bdbb38e)
[INFO] [stderr]    Doc-tests nclosure
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:4:18
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![cfg_attr(doc, feature(doc_auto_cfg))]
[INFO] [stderr]   |                  ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 1 previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.91.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2021 --crate-type lib --color auto --crate-name nclosure --test src/lib.rs --test-run-directory /opt/rustwide/workdir -L dependency=/opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern chain_trans=/opt/rustwide/target/debug/deps/libchain_trans-9d7fe54da3c9337f.rlib --extern nclosure=/opt/rustwide/target/debug/deps/libnclosure-752c260e015ee6e8.rlib -C embed-bitcode=no --cfg 'feature="alloc"' --cfg 'feature="default"' --cfg 'feature="std"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("alloc", "default", "std"))' --cap-lints=warn --error-format human` (exit status: 1)
[INFO] [stderr] note: test exited abnormally; to see the full output pass --no-capture to the harness.
[INFO] running `Command { std: "docker" "inspect" "4e66b40e58761b1a7b40afc6373f69df9c3f8c0e13bfa558f2ce5df125cb6e02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e66b40e58761b1a7b40afc6373f69df9c3f8c0e13bfa558f2ce5df125cb6e02", kill_on_drop: false }`
[INFO] [stdout] 4e66b40e58761b1a7b40afc6373f69df9c3f8c0e13bfa558f2ce5df125cb6e02