[INFO] fetching crate cactusref 0.2.0...
[INFO] testing cactusref-0.2.0 against 1.60.0 for beta-1.61-1
[INFO] extracting crate cactusref 0.2.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate cactusref 0.2.0 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cactusref 0.2.0
[INFO] finished tweaking crates.io crate cactusref 0.2.0
[INFO] tweaked toml for crates.io crate cactusref 0.2.0 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1165448bb66356d2b51cd7c52f20605c563c3853e6f31dab1762c21bb93945a6
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1165448bb66356d2b51cd7c52f20605c563c3853e6f31dab1762c21bb93945a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1165448bb66356d2b51cd7c52f20605c563c3853e6f31dab1762c21bb93945a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1165448bb66356d2b51cd7c52f20605c563c3853e6f31dab1762c21bb93945a6", kill_on_drop: false }`
[INFO] [stdout] 1165448bb66356d2b51cd7c52f20605c563c3853e6f31dab1762c21bb93945a6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 964c2020a9ef037f0b7c2db956cdf452db58308088ecb625758af77aeafbe1d7
[INFO] running `Command { std: "docker" "start" "-a" "964c2020a9ef037f0b7c2db956cdf452db58308088ecb625758af77aeafbe1d7", kill_on_drop: false }`
[INFO] [stderr]    Compiling hashbrown v0.12.0
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling cactusref v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | / #![feature(
[INFO] [stdout] 2 | |     allocator_api,
[INFO] [stdout] 3 | |     core_intrinsics,
[INFO] [stdout] 4 | |     dropck_eyepatch,
[INFO] [stdout] ... |
[INFO] [stdout] 7 | |     slice_ptr_get
[INFO] [stdout] 8 | | )]
[INFO] [stdout]   | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `with_metadata_of` found for raw pointer `*mut u8` in the current scope
[INFO] [stdout]    --> src/rc.rs:591:14
[INFO] [stdout]     |
[INFO] [stdout] 591 |             .with_metadata_of(ptr as *mut RcBox<T>);
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^ method not found in `*mut u8`
[INFO] [stdout]     |
[INFO] [stdout]     = note: try using `<*const T>::as_ref()` to get a reference to the type behind the pointer: https://doc.rust-lang.org/std/primitive.pointer.html#method.as_ref
[INFO] [stdout]     = note: using `<*const T>::as_ref()` on a pointer which is unaligned or points to invalid or uninitialized memory is undefined behavior
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `with_metadata_of` found for raw pointer `*mut u8` in the current scope
[INFO] [stdout]    --> src/rc.rs:986:23
[INFO] [stdout]     |
[INFO] [stdout] 986 |             |mem| mem.with_metadata_of(ptr as *mut RcBox<T>),
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^ method not found in `*mut u8`
[INFO] [stdout]     |
[INFO] [stdout]     = note: try using `<*const T>::as_ref()` to get a reference to the type behind the pointer: https://doc.rust-lang.org/std/primitive.pointer.html#method.as_ref
[INFO] [stdout]     = note: using `<*const T>::as_ref()` on a pointer which is unaligned or points to invalid or uninitialized memory is undefined behavior
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `with_metadata_of` found for raw pointer `*mut u8` in the current scope
[INFO] [stdout]     --> src/rc.rs:1516:18
[INFO] [stdout]      |
[INFO] [stdout] 1516 |                 .with_metadata_of(ptr as *mut RcBox<T>)
[INFO] [stdout]      |                  ^^^^^^^^^^^^^^^^ method not found in `*mut u8`
[INFO] [stdout]      |
[INFO] [stdout]      = note: try using `<*const T>::as_ref()` to get a reference to the type behind the pointer: https://doc.rust-lang.org/std/primitive.pointer.html#method.as_ref
[INFO] [stdout]      = note: using `<*const T>::as_ref()` on a pointer which is unaligned or points to invalid or uninitialized memory is undefined behavior
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cactusref` due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "964c2020a9ef037f0b7c2db956cdf452db58308088ecb625758af77aeafbe1d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "964c2020a9ef037f0b7c2db956cdf452db58308088ecb625758af77aeafbe1d7", kill_on_drop: false }`
[INFO] [stdout] 964c2020a9ef037f0b7c2db956cdf452db58308088ecb625758af77aeafbe1d7