[INFO] fetching crate libsix 0.0.2...
[INFO] testing libsix-0.0.2 against 1.69.0 for beta-1.70-1
[INFO] extracting crate libsix 0.0.2 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate libsix 0.0.2 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 libsix 0.0.2
[INFO] finished tweaking crates.io crate libsix 0.0.2
[INFO] tweaked toml for crates.io crate libsix 0.0.2 written to /workspace/builds/worker-6-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 unmem v0.2.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] e76c64dc247f882741f69217f0857513e92763ef4c7ddd454b7d9692fa305cea
[INFO] running `Command { std: "docker" "start" "-a" "e76c64dc247f882741f69217f0857513e92763ef4c7ddd454b7d9692fa305cea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e76c64dc247f882741f69217f0857513e92763ef4c7ddd454b7d9692fa305cea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e76c64dc247f882741f69217f0857513e92763ef4c7ddd454b7d9692fa305cea", kill_on_drop: false }`
[INFO] [stdout] e76c64dc247f882741f69217f0857513e92763ef4c7ddd454b7d9692fa305cea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 98e5e3f6ef8f7d0ade5062b5742ac65e9382a10e313dd3d9bc55d48f46898e40
[INFO] running `Command { std: "docker" "start" "-a" "98e5e3f6ef8f7d0ade5062b5742ac65e9382a10e313dd3d9bc55d48f46898e40", kill_on_drop: false }`
[INFO] [stderr]    Compiling unmem v0.2.6
[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/unmem-0.2.6/src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(box_syntax, decl_macro, const_mut_refs, const_ptr_read, core_intrinsics)]
[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/unmem-0.2.6/src/lib.rs:6:52
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(box_syntax, decl_macro, const_mut_refs, const_ptr_read, core_intrinsics)]
[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/unmem-0.2.6/src/lib.rs:6:68
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(box_syntax, decl_macro, const_mut_refs, const_ptr_read, core_intrinsics)]
[INFO] [stdout]   |                                                                    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 `unmem` due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "98e5e3f6ef8f7d0ade5062b5742ac65e9382a10e313dd3d9bc55d48f46898e40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98e5e3f6ef8f7d0ade5062b5742ac65e9382a10e313dd3d9bc55d48f46898e40", kill_on_drop: false }`
[INFO] [stdout] 98e5e3f6ef8f7d0ade5062b5742ac65e9382a10e313dd3d9bc55d48f46898e40
