[INFO] fetching crate rslab 0.2.0...
[INFO] testing rslab-0.2.0 against master#562dee4820c458d823175268e41601d4c060588a for pr-154210-2
[INFO] extracting crate rslab 0.2.0 into /workspace/builds/worker-5-tc1/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-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rslab 0.2.0 on toolchain 562dee4820c458d823175268e41601d4c060588a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "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" "+562dee4820c458d823175268e41601d4c060588a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bit_field v0.10.1
[INFO] [stderr]   Downloaded simple-chunk-allocator v0.1.5
[INFO] [stderr]   Downloaded linked_list_allocator v0.10.4
[INFO] [stderr]   Downloaded spinning_top v0.2.4
[INFO] [stderr]   Downloaded doubly-linked-list v0.2.0
[INFO] [stderr]   Downloaded preprint v0.1.0
[INFO] [stderr]   Downloaded float-ord v0.3.2
[INFO] [stderr]   Downloaded buddy_system_allocator v0.8.0
[INFO] [stderr]   Downloaded easy-cast v0.4.4
[INFO] [stderr]   Downloaded volatile v0.4.5
[INFO] [stderr]   Downloaded average v0.13.1
[INFO] [stderr]   Downloaded spin v0.7.1
[INFO] [stderr]   Downloaded libm v0.2.5
[INFO] [stderr]   Downloaded raw-cpuid v10.6.0
[INFO] [stderr]   Downloaded x86 v0.51.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3e481e66aa982096e33870da7cb126a9579e72d4fc44a0ef49b7deb219737051
[INFO] running `Command { std: "docker" "start" "-a" "3e481e66aa982096e33870da7cb126a9579e72d4fc44a0ef49b7deb219737051", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3e481e66aa982096e33870da7cb126a9579e72d4fc44a0ef49b7deb219737051", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e481e66aa982096e33870da7cb126a9579e72d4fc44a0ef49b7deb219737051", kill_on_drop: false }`
[INFO] [stdout] 3e481e66aa982096e33870da7cb126a9579e72d4fc44a0ef49b7deb219737051
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=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" "+562dee4820c458d823175268e41601d4c060588a" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8e4c99995851099f282aeb89357e81bd4b4043f435f25801339865acbbac9849
[INFO] running `Command { std: "docker" "start" "-a" "8e4c99995851099f282aeb89357e81bd4b4043f435f25801339865acbbac9849", 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" "8e4c99995851099f282aeb89357e81bd4b4043f435f25801339865acbbac9849", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e4c99995851099f282aeb89357e81bd4b4043f435f25801339865acbbac9849", kill_on_drop: false }`
[INFO] [stdout] 8e4c99995851099f282aeb89357e81bd4b4043f435f25801339865acbbac9849