[INFO] cloning repository https://github.com/JackGannonUK/trux
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JackGannonUK/trux" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJackGannonUK%2Ftrux", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJackGannonUK%2Ftrux'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ba21bd163e5f1d0b700b66914a7b2df031913583
[INFO] checking JackGannonUK/trux against try#8de4b308b608cded0ebccf658a0fc719bce87d4e for pr-89056
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJackGannonUK%2Ftrux" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JackGannonUK/trux on toolchain 8de4b308b608cded0ebccf658a0fc719bce87d4e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-12/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-12/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/JackGannonUK/trux
[INFO] removed 0 missing tests
[INFO] finished tweaking git repo https://github.com/JackGannonUK/trux
[INFO] tweaked toml for git repo https://github.com/JackGannonUK/trux written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/JackGannonUK/trux already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: the cargo feature `edition2021` has been stabilized in the 1.56 release and is no longer necessary to be listed in the manifest
[INFO] [stderr]   See https://doc.rust-lang.org/nightly/cargo/reference/manifest.html#the-edition-field for more information about using this feature.
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pic8259 v0.10.1
[INFO] [stderr]   Downloaded bootloader v0.9.18
[INFO] [stderr]   Downloaded volatile v0.4.4
[INFO] [stderr]   Downloaded uart_16550 v0.2.15
[INFO] [stderr]   Downloaded x86_64 v0.14.4
[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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] af4bd761042b118bd34d6fe632a149a6b2f89052300d83b8f52143e0a62743a0
[INFO] running `Command { std: "docker" "start" "-a" "af4bd761042b118bd34d6fe632a149a6b2f89052300d83b8f52143e0a62743a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "af4bd761042b118bd34d6fe632a149a6b2f89052300d83b8f52143e0a62743a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af4bd761042b118bd34d6fe632a149a6b2f89052300d83b8f52143e0a62743a0", kill_on_drop: false }`
[INFO] [stdout] af4bd761042b118bd34d6fe632a149a6b2f89052300d83b8f52143e0a62743a0
[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=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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c03e1282b4597a6bd020e37bdb18bf2c79f4befe382370b3bca99401227c51dd
[INFO] running `Command { std: "docker" "start" "-a" "c03e1282b4597a6bd020e37bdb18bf2c79f4befe382370b3bca99401227c51dd", kill_on_drop: false }`
[INFO] [stderr] warning: the cargo feature `edition2021` has been stabilized in the 1.56 release and is no longer necessary to be listed in the manifest
[INFO] [stderr]   See https://doc.rust-lang.org/nightly/cargo/reference/manifest.html#the-edition-field for more information about using this feature.
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling x86_64 v0.14.4
[INFO] [stderr]     Checking bit_field v0.9.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking volatile v0.4.4
[INFO] [stderr]    Compiling bootloader v0.9.18
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]     Checking volatile v0.2.7
[INFO] [stderr]     Checking pc-keyboard v0.5.1
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking spinning_top v0.2.4
[INFO] [stderr]     Checking linked_list_allocator v0.9.0
[INFO] [stderr]     Checking uart_16550 v0.2.15
[INFO] [stderr]     Checking pic8259 v0.10.1
[INFO] [stderr]     Checking metta v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `FrameAllocator`, `Mapper`, `PageTableFlags`, `Page`, `Size4KiB`, `VirtAddr`, `mapper::MapToError`
[INFO] [stdout]   --> src/allocator.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |         mapper::MapToError, FrameAllocator, Mapper, Page, PageTableFlags, Size4KiB,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^  ^^^^^^  ^^^^  ^^^^^^^^^^^^^^  ^^^^^^^^
[INFO] [stdout] 15 |     },
[INFO] [stdout] 16 |     VirtAddr,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: language item required, but not found: `eh_personality`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `FrameAllocator`, `Mapper`, `PageTableFlags`, `Page`, `Size4KiB`, `VirtAddr`, `mapper::MapToError`
[INFO] [stdout]   --> src/allocator.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |         mapper::MapToError, FrameAllocator, Mapper, Page, PageTableFlags, Size4KiB,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^  ^^^^^^  ^^^^  ^^^^^^^^^^^^^^  ^^^^^^^^
[INFO] [stdout] 15 |     },
[INFO] [stdout] 16 |     VirtAddr,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate-level attribute should be in the root module
[INFO] [stdout]  --> src/allocator/fixed_size_block.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(repr128)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate-level attribute should be in the root module
[INFO] [stdout]  --> src/allocator/fixed_size_block.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(const_mut_refs)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `x86_64::instructions::segmentation::set_cs`: use `CS::set_reg()` instead
[INFO] [stdout]   --> src/gdt.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |         set_cs(GDT.1.code_selector);
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `x86_64::instructions::segmentation::set_cs`: use `CS::set_reg()` instead
[INFO] [stdout]   --> src/gdt.rs:47:45
[INFO] [stdout]    |
[INFO] [stdout] 47 |     use x86_64::instructions::segmentation::set_cs;
[INFO] [stdout]    |                                             ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate-level attribute should be in the root module
[INFO] [stdout]  --> src/allocator/fixed_size_block.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(repr128)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate-level attribute should be in the root module
[INFO] [stdout]  --> src/allocator/fixed_size_block.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(const_mut_refs)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `x86_64::instructions::segmentation::set_cs`: use `CS::set_reg()` instead
[INFO] [stdout]   --> src/gdt.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |         set_cs(GDT.1.code_selector);
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `x86_64::instructions::segmentation::set_cs`: use `CS::set_reg()` instead
[INFO] [stdout]   --> src/gdt.rs:47:45
[INFO] [stdout]    |
[INFO] [stdout] 47 |     use x86_64::instructions::segmentation::set_cs;
[INFO] [stdout]    |                                             ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `metta` due to 2 previous errors; 5 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0658]: mutable references are not allowed in constant functions
[INFO] [stdout]   --> src/allocator/fixed_size_block.rs:40:25
[INFO] [stdout]    |
[INFO] [stdout] 40 |             list_heads: [EMPTY; BLOCK_SIZES.len()],
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
[INFO] [stdout]    = help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: mutable references are not allowed in constant functions
[INFO] [stdout]   --> src/allocator/linked_list.rs:15:32
[INFO] [stdout]    |
[INFO] [stdout] 15 |         ListNode { size, next: None }
[INFO] [stdout]    |                                ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
[INFO] [stdout]    = help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "c03e1282b4597a6bd020e37bdb18bf2c79f4befe382370b3bca99401227c51dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c03e1282b4597a6bd020e37bdb18bf2c79f4befe382370b3bca99401227c51dd", kill_on_drop: false }`
[INFO] [stdout] c03e1282b4597a6bd020e37bdb18bf2c79f4befe382370b3bca99401227c51dd