[INFO] fetching crate rslab 0.2.0...
[INFO] testing rslab-0.2.0 against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210-2
[INFO] extracting crate rslab 0.2.0 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate rslab 0.2.0
[INFO] finished tweaking crates.io crate rslab 0.2.0
[INFO] tweaked toml for crates.io crate rslab 0.2.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rslab 0.2.0 on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rslab 0.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f4b97ec1839c533d43a96858ec591fa6f5a525dbbe6fdffb3ff84acc1a42502a
[INFO] running `Command { std: "docker" "start" "-a" "f4b97ec1839c533d43a96858ec591fa6f5a525dbbe6fdffb3ff84acc1a42502a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f4b97ec1839c533d43a96858ec591fa6f5a525dbbe6fdffb3ff84acc1a42502a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4b97ec1839c533d43a96858ec591fa6f5a525dbbe6fdffb3ff84acc1a42502a", kill_on_drop: false }`
[INFO] [stdout] f4b97ec1839c533d43a96858ec591fa6f5a525dbbe6fdffb3ff84acc1a42502a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fce1a2c38668647711f5f51e20ba8e25f7ef437dbe1d1c8630755676bda7c9fe
[INFO] running `Command { std: "docker" "start" "-a" "fce1a2c38668647711f5f51e20ba8e25f7ef437dbe1d1c8630755676bda7c9fe", kill_on_drop: false }`
[INFO] [stderr]    Compiling volatile v0.4.5
[INFO] [stderr]    Compiling preprint v0.1.0
[INFO] [stderr]    Compiling doubly-linked-list v0.2.0
[INFO] [stderr]    Compiling rslab v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `alloc_layout_extra` has been stable since 1.95.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(alloc_layout_extra)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `nonnull_slice_from_raw_parts` has been stable since 1.70.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(nonnull_slice_from_raw_parts)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `dangling` found for struct `Layout` in the current scope
[INFO] [stdout]   --> src/kmalloc.rs:58:60
[INFO] [stdout]    |
[INFO] [stdout] 58 |             return Ok(NonNull::slice_from_raw_parts(layout.dangling(), 0));
[INFO] [stdout]    |                                                            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: there is a method `dangling_ptr` with a similar name
[INFO] [stdout]    |
[INFO] [stdout] 58 |             return Ok(NonNull::slice_from_raw_parts(layout.dangling_ptr(), 0));
[INFO] [stdout]    |                                                                    ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rslab` (lib) due to 1 previous error; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "fce1a2c38668647711f5f51e20ba8e25f7ef437dbe1d1c8630755676bda7c9fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fce1a2c38668647711f5f51e20ba8e25f7ef437dbe1d1c8630755676bda7c9fe", kill_on_drop: false }`
[INFO] [stdout] fce1a2c38668647711f5f51e20ba8e25f7ef437dbe1d1c8630755676bda7c9fe