[INFO] fetching crate emf-core-base-rs 0.1.3...
[INFO] documenting emf-core-base-rs-0.1.3 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate emf-core-base-rs 0.1.3 into /workspace/builds/worker-18/source
[INFO] validating manifest of crates.io crate emf-core-base-rs 0.1.3 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate emf-core-base-rs 0.1.3
[INFO] finished tweaking crates.io crate emf-core-base-rs 0.1.3
[INFO] tweaked toml for crates.io crate emf-core-base-rs 0.1.3 written to /workspace/builds/worker-18/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded miniz_oxide v0.5.1
[INFO] [stderr]   Downloaded cc v1.0.73
[INFO] [stderr]   Downloaded addr2line v0.17.0
[INFO] [stderr]   Downloaded object v0.28.4
[INFO] [stderr]   Downloaded backtrace v0.3.65
[INFO] [stderr]   Downloaded gimli v0.26.1
[INFO] [stderr]   Downloaded rustc-demangle v0.1.21
[INFO] [stderr]   Downloaded emf-core-base-rs-ffi v0.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7385c3b40d0077f31e321126331b586db1d6d9f9db3f5eaa1c96a9b2b3a8d4a4
[INFO] running `Command { std: "docker" "start" "-a" "7385c3b40d0077f31e321126331b586db1d6d9f9db3f5eaa1c96a9b2b3a8d4a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7385c3b40d0077f31e321126331b586db1d6d9f9db3f5eaa1c96a9b2b3a8d4a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7385c3b40d0077f31e321126331b586db1d6d9f9db3f5eaa1c96a9b2b3a8d4a4", kill_on_drop: false }`
[INFO] [stdout] 7385c3b40d0077f31e321126331b586db1d6d9f9db3f5eaa1c96a9b2b3a8d4a4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/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" "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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e34d21c5bb4ced34f6e799344512fd24fe9d1152daf92b594227ec328f9b6117
[INFO] running `Command { std: "docker" "start" "-a" "e34d21c5bb4ced34f6e799344512fd24fe9d1152daf92b594227ec328f9b6117", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking emf-core-base-rs-ffi v0.1.2
[INFO] [stderr]     Checking backtrace v0.3.65
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/emf-core-base-rs-ffi-0.1.2/src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(c_unwind)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `emf-core-base-rs-ffi` due to 2 previous errors
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e34d21c5bb4ced34f6e799344512fd24fe9d1152daf92b594227ec328f9b6117", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e34d21c5bb4ced34f6e799344512fd24fe9d1152daf92b594227ec328f9b6117", kill_on_drop: false }`
[INFO] [stdout] e34d21c5bb4ced34f6e799344512fd24fe9d1152daf92b594227ec328f9b6117