[INFO] fetching crate fuzzcheck 0.12.1...
[INFO] documenting fuzzcheck-0.12.1 against 1.69.0 for beta-1.70-rustdoc-1
[INFO] extracting crate fuzzcheck 0.12.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate fuzzcheck 0.12.1 on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fuzzcheck 0.12.1
[INFO] finished tweaking crates.io crate fuzzcheck 0.12.1
[INFO] tweaked toml for crates.io crate fuzzcheck 0.12.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+1.69.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded nu-ansi-term v0.39.0
[INFO] [stderr]   Downloaded fuzzcheck_common v0.12.0
[INFO] [stderr]   Downloaded fuzzcheck_mutators_derive v0.12.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 473c5e286a7a9985af96db1cb85ddffc39bebb0d833300dd693ca86963eaafc3
[INFO] running `Command { std: "docker" "start" "-a" "473c5e286a7a9985af96db1cb85ddffc39bebb0d833300dd693ca86963eaafc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "473c5e286a7a9985af96db1cb85ddffc39bebb0d833300dd693ca86963eaafc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "473c5e286a7a9985af96db1cb85ddffc39bebb0d833300dd693ca86963eaafc3", kill_on_drop: false }`
[INFO] [stdout] 473c5e286a7a9985af96db1cb85ddffc39bebb0d833300dd693ca86963eaafc3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2a2c808f9a3f27e2feee8a54b72e289acccccfd39d67b8d666d3e5d084823e84
[INFO] running `Command { std: "docker" "start" "-a" "2a2c808f9a3f27e2feee8a54b72e289acccccfd39d67b8d666d3e5d084823e84", kill_on_drop: false }`
[INFO] [stderr]    Compiling libz-sys v1.1.9
[INFO] [stderr]    Compiling ahash v0.7.6
[INFO] [stderr]     Checking getrandom v0.2.9
[INFO] [stderr]    Compiling fuzzcheck v0.12.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking nu-ansi-term v0.39.0
[INFO] [stderr]    Compiling fuzzcheck_mutators_derive v0.12.0
[INFO] [stderr]     Checking fuzzcheck_common v0.12.0
[INFO] [stderr]     Checking object v0.27.1
[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/fuzzcheck_common-0.12.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(no_coverage)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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] [stderr] error: could not compile `fuzzcheck_common` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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/fuzzcheck_mutators_derive-0.12.0/src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(let_chains)]
[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/github.com-1ecc6299db9ec823/fuzzcheck_mutators_derive-0.12.0/src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(stmt_expr_attributes)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fuzzcheck_mutators_derive` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "2a2c808f9a3f27e2feee8a54b72e289acccccfd39d67b8d666d3e5d084823e84", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a2c808f9a3f27e2feee8a54b72e289acccccfd39d67b8d666d3e5d084823e84", kill_on_drop: false }`
[INFO] [stdout] 2a2c808f9a3f27e2feee8a54b72e289acccccfd39d67b8d666d3e5d084823e84
