[INFO] cloning repository https://github.com/LearningOS/2024a-stage4-proj2
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LearningOS/2024a-stage4-proj2" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2F2024a-stage4-proj2", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2F2024a-stage4-proj2'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 16a9bf043d0c5161682e726f578ca33c9ac5d94f
[INFO] checking LearningOS/2024a-stage4-proj2 against try#a7b168ac4977e8e93a43448b44847adaa305d5a9 for pr-150557
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2F2024a-stage4-proj2" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-2-tc2/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/LearningOS/2024a-stage4-proj2
[INFO] finished tweaking git repo https://github.com/LearningOS/2024a-stage4-proj2
[INFO] tweaked toml for git repo https://github.com/LearningOS/2024a-stage4-proj2 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/LearningOS/2024a-stage4-proj2 on toolchain a7b168ac4977e8e93a43448b44847adaa305d5a9
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a7b168ac4977e8e93a43448b44847adaa305d5a9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/LearningOS/2024a-stage4-proj2 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" "+a7b168ac4977e8e93a43448b44847adaa305d5a9" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking LearningOS/2024a-stage4-proj2 against try#a7b168ac4977e8e93a43448b44847adaa305d5a9 for pr-150557
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2F2024a-stage4-proj2" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-2-tc2/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/LearningOS/2024a-stage4-proj2
[INFO] finished tweaking git repo https://github.com/LearningOS/2024a-stage4-proj2
[INFO] tweaked toml for git repo https://github.com/LearningOS/2024a-stage4-proj2 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/LearningOS/2024a-stage4-proj2 on toolchain a7b168ac4977e8e93a43448b44847adaa305d5a9
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a7b168ac4977e8e93a43448b44847adaa305d5a9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/LearningOS/2024a-stage4-proj2 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" "+a7b168ac4977e8e93a43448b44847adaa305d5a9" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking LearningOS/2024a-stage4-proj2 against try#a7b168ac4977e8e93a43448b44847adaa305d5a9 for pr-150557
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2F2024a-stage4-proj2" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-2-tc2/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/LearningOS/2024a-stage4-proj2
[INFO] finished tweaking git repo https://github.com/LearningOS/2024a-stage4-proj2
[INFO] tweaked toml for git repo https://github.com/LearningOS/2024a-stage4-proj2 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/LearningOS/2024a-stage4-proj2 on toolchain a7b168ac4977e8e93a43448b44847adaa305d5a9
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a7b168ac4977e8e93a43448b44847adaa305d5a9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/LearningOS/2024a-stage4-proj2 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" "+a7b168ac4977e8e93a43448b44847adaa305d5a9" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking LearningOS/2024a-stage4-proj2 against try#a7b168ac4977e8e93a43448b44847adaa305d5a9 for pr-150557
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2F2024a-stage4-proj2" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-2-tc2/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/LearningOS/2024a-stage4-proj2
[INFO] finished tweaking git repo https://github.com/LearningOS/2024a-stage4-proj2
[INFO] tweaked toml for git repo https://github.com/LearningOS/2024a-stage4-proj2 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/LearningOS/2024a-stage4-proj2 on toolchain a7b168ac4977e8e93a43448b44847adaa305d5a9
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a7b168ac4977e8e93a43448b44847adaa305d5a9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/LearningOS/2024a-stage4-proj2 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" "+a7b168ac4977e8e93a43448b44847adaa305d5a9" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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 kernel_guard v0.1.1
[INFO] [stderr]   Downloaded timer_list v0.1.0
[INFO] [stderr]   Downloaded axerrno v0.1.0
[INFO] [stderr]   Downloaded axio v0.1.0
[INFO] [stderr]   Downloaded kspin v0.1.0
[INFO] [stderr]   Downloaded crate_interface v0.1.3
[INFO] [stderr]   Downloaded syn v2.0.70
[INFO] [stderr]   Downloaded axfs_devfs v0.1.1
[INFO] [stderr]   Downloaded core_detect v1.0.0
[INFO] [stderr]   Downloaded aarch64-cpu v9.4.0
[INFO] [stderr]   Downloaded bitmaps v3.2.1
[INFO] [stderr]   Downloaded defmt-parser v0.3.3
[INFO] [stderr]   Downloaded memory_set v0.3.1
[INFO] [stderr]   Downloaded linkme-impl v0.3.27
[INFO] [stderr]   Downloaded linkme v0.3.27
[INFO] [stderr]   Downloaded bitmap-allocator v0.1.0
[INFO] [stderr]   Downloaded aho-corasick v1.0.4
[INFO] [stderr]   Downloaded regex-syntax v0.7.4
[INFO] [stderr]   Downloaded regex v1.9.3
[INFO] [stderr]   Downloaded cap_access v0.1.0
[INFO] [stderr]   Downloaded axfs_vfs v0.1.1
[INFO] [stderr]   Downloaded raw-cpuid v11.1.0
[INFO] [stderr]   Downloaded x86_64 v0.15.1
[INFO] [stderr]   Downloaded volatile v0.3.0
[INFO] [stderr]   Downloaded regex-automata v0.3.6
[INFO] [stderr]   Downloaded x86_64 v0.14.12
[INFO] [stderr]   Downloaded tock-registers v0.8.1
[INFO] [stderr]   Downloaded bit v0.1.1
[INFO] [stderr]   Downloaded virtio-drivers v0.7.4
[INFO] [stderr]   Downloaded svgbobdoc v0.3.0
[INFO] [stderr]   Downloaded lazyinit v0.2.1
[INFO] [stderr]   Downloaded int_ratio v0.1.0
[INFO] [stderr]   Downloaded x86 v0.52.0
[INFO] [stderr]   Downloaded volatile v0.2.7
[INFO] [stderr]   Downloaded arm_pl031 v0.2.1
[INFO] [stderr]   Downloaded rlsf v0.2.1
[INFO] [stderr]   Downloaded riscv v0.11.1
[INFO] [stderr]   Downloaded volatile v0.4.6
[INFO] [stderr]   Downloaded buddy_system_allocator v0.10.0
[INFO] [stderr]   Downloaded riscv_goldfish v0.1.1
[INFO] [stderr]   Downloaded x86_rtc v0.1.1
[INFO] [stderr]   Downloaded memory_addr v0.3.1
[INFO] [stderr]   Downloaded defmt-macros v0.3.6
[INFO] [stderr]   Downloaded defmt v0.3.5
[INFO] [stderr]   Downloaded managed v0.8.0
[INFO] [stderr]   Downloaded arm_gicv2 v0.1.0
[INFO] [stderr]   Downloaded arm_pl011 v0.1.0
[INFO] [stderr]   Downloaded const-default v1.0.0
[INFO] [stderr]   Downloaded dw_apb_uart v0.1.0
[INFO] [stderr]   Downloaded handler_table v0.1.1
[INFO] [stderr]   Downloaded percpu v0.1.3
[INFO] [stderr]   Downloaded x2apic v0.4.3
[INFO] [stderr]   Downloaded prettyplease v0.2.12
[INFO] [stderr]   Downloaded axfs_ramfs v0.1.1
[INFO] [stderr]   Downloaded percpu_macros v0.1.2
[INFO] [stderr]   Downloaded flatten_objects v0.1.0
[INFO] [stderr]   Downloaded page_table_entry v0.4.0
[INFO] [stderr]   Downloaded page_table_multiarch v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+a7b168ac4977e8e93a43448b44847adaa305d5a9" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9522614ca474ad679811f4656932f3b4889d6460d75fc93a909746d6280c8dc1
[INFO] running `Command { std: "docker" "start" "-a" "9522614ca474ad679811f4656932f3b4889d6460d75fc93a909746d6280c8dc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9522614ca474ad679811f4656932f3b4889d6460d75fc93a909746d6280c8dc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9522614ca474ad679811f4656932f3b4889d6460d75fc93a909746d6280c8dc1", kill_on_drop: false }`
[INFO] [stdout] 9522614ca474ad679811f4656932f3b4889d6460d75fc93a909746d6280c8dc1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+a7b168ac4977e8e93a43448b44847adaa305d5a9" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 94af1efb4f0c9d0a0555caf6934bd19b60c2e57ef8c5faa8a85d91dd39073b17
[INFO] running `Command { std: "docker" "start" "-a" "94af1efb4f0c9d0a0555caf6934bd19b60c2e57ef8c5faa8a85d91dd39073b17", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-ident v1.0.11
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]     Checking log v0.4.21
[INFO] [stderr]    Compiling serde v1.0.204
[INFO] [stderr]    Compiling hashbrown v0.14.0
[INFO] [stderr]    Compiling axerrno v0.1.0
[INFO] [stderr]    Compiling lock_api v0.4.10
[INFO] [stderr]    Compiling num-traits v0.2.16
[INFO] [stderr]    Compiling base64 v0.13.1
[INFO] [stderr]     Checking volatile v0.4.6
[INFO] [stderr]    Compiling unicode-width v0.1.10
[INFO] [stderr]     Checking memory_addr v0.3.1
[INFO] [stderr]    Compiling x86 v0.52.0
[INFO] [stderr]     Checking raw-cpuid v10.7.0
[INFO] [stderr]     Checking const-default v1.0.0
[INFO] [stderr]     Checking bitmap-allocator v0.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]     Checking iana-time-zone v0.1.60
[INFO] [stderr]     Checking x86_64 v0.15.1
[INFO] [stderr]    Compiling percpu v0.1.3
[INFO] [stderr]     Checking x86_64 v0.14.12
[INFO] [stderr]     Checking bit v0.1.1
[INFO] [stderr]     Checking raw-cpuid v11.1.0
[INFO] [stderr]     Checking lazyinit v0.2.1
[INFO] [stderr]     Checking handler_table v0.1.1
[INFO] [stderr]     Checking int_ratio v0.1.0
[INFO] [stderr]     Checking linked_list v0.1.0 (https://github.com/arceos-org/linked_list.git?tag=v0.1.0#34c8db30)
[INFO] [stderr]     Checking timer_list v0.1.0
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling glob v0.3.1
[INFO] [stderr]     Checking scheduler v0.1.0 (https://github.com/arceos-org/scheduler.git?tag=v0.1.0#c8d25d9a)
[INFO] [stderr]     Checking axdriver_base v0.1.0 (https://github.com/arceos-org/axdriver_crates.git?tag=v0.1.0#78686a7e)
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling prettyplease v0.2.12
[INFO] [stderr]    Compiling regex-syntax v0.7.4
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]    Compiling indexmap v2.0.0
[INFO] [stdout] error[E0053]: method `steps_between` has an incompatible type for trait
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/x86_64-0.14.12/src/addr.rs:382:51
[INFO] [stdout]     |
[INFO] [stdout] 382 |     fn steps_between(start: &Self, end: &Self) -> Option<usize> {
[INFO] [stdout]     |                                                   ^^^^^^^^^^^^^ expected `(usize, Option<usize>)`, found `Option<usize>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected signature `fn(&addr::VirtAddr, &addr::VirtAddr) -> (usize, Option<usize>)`
[INFO] [stdout]                found signature `fn(&addr::VirtAddr, &addr::VirtAddr) -> Option<usize>`
[INFO] [stdout] help: change the output type to match the trait
[INFO] [stdout]     |
[INFO] [stdout] 382 -     fn steps_between(start: &Self, end: &Self) -> Option<usize> {
[INFO] [stdout] 382 +     fn steps_between(start: &Self, end: &Self) -> (usize, Option<usize>) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking axio v0.1.0
[INFO] [stdout] error[E0053]: method `steps_between` has an incompatible type for trait
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/x86_64-0.15.1/src/addr.rs:362:51
[INFO] [stdout]     |
[INFO] [stdout] 362 |     fn steps_between(start: &Self, end: &Self) -> Option<usize> {
[INFO] [stdout]     |                                                   ^^^^^^^^^^^^^ expected `(usize, Option<usize>)`, found `Option<usize>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected signature `fn(&addr::VirtAddr, &addr::VirtAddr) -> (usize, Option<usize>)`
[INFO] [stdout]                found signature `fn(&addr::VirtAddr, &addr::VirtAddr) -> Option<usize>`
[INFO] [stdout] help: change the output type to match the trait
[INFO] [stdout]     |
[INFO] [stdout] 362 -     fn steps_between(start: &Self, end: &Self) -> Option<usize> {
[INFO] [stdout] 362 +     fn steps_between(start: &Self, end: &Self) -> (usize, Option<usize>) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/axio-0.1.0/src/lib.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(doc_auto_cfg)]
[INFO] [stdout]   |            ^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: removed in 1.92.0; see <https://github.com/rust-lang/rust/pull/138907> for more information
[INFO] [stdout]   = note: merged into `doc_cfg`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stdout] For more information about this error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `axio` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0053]: method `steps_between` has an incompatible type for trait
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/x86_64-0.14.12/src/structures/paging/page.rs:282:51
[INFO] [stdout]     |
[INFO] [stdout] 282 |     fn steps_between(start: &Self, end: &Self) -> Option<usize> {
[INFO] [stdout]     |                                                   ^^^^^^^^^^^^^ expected `(usize, Option<usize>)`, found `Option<usize>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected signature `fn(&Page<_>, &Page<_>) -> (usize, Option<usize>)`
[INFO] [stdout]                found signature `fn(&Page<_>, &Page<_>) -> Option<usize>`
[INFO] [stdout] help: change the output type to match the trait
[INFO] [stdout]     |
[INFO] [stdout] 282 -     fn steps_between(start: &Self, end: &Self) -> Option<usize> {
[INFO] [stdout] 282 +     fn steps_between(start: &Self, end: &Self) -> (usize, Option<usize>) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0053]: method `steps_between` has an incompatible type for trait
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/x86_64-0.15.1/src/structures/paging/page.rs:294:51
[INFO] [stdout]     |
[INFO] [stdout] 294 |     fn steps_between(start: &Self, end: &Self) -> Option<usize> {
[INFO] [stdout]     |                                                   ^^^^^^^^^^^^^ expected `(usize, Option<usize>)`, found `Option<usize>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected signature `fn(&Page<_>, &Page<_>) -> (usize, Option<usize>)`
[INFO] [stdout]                found signature `fn(&Page<_>, &Page<_>) -> Option<usize>`
[INFO] [stdout] help: change the output type to match the trait
[INFO] [stdout]     |
[INFO] [stdout] 294 -     fn steps_between(start: &Self, end: &Self) -> Option<usize> {
[INFO] [stdout] 294 +     fn steps_between(start: &Self, end: &Self) -> (usize, Option<usize>) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0053]: method `steps_between` has an incompatible type for trait
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/x86_64-0.15.1/src/structures/paging/page_table.rs:349:51
[INFO] [stdout]     |
[INFO] [stdout] 349 |     fn steps_between(start: &Self, end: &Self) -> Option<usize> {
[INFO] [stdout]     |                                                   ^^^^^^^^^^^^^ expected `(usize, Option<usize>)`, found `Option<usize>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected signature `fn(&PageTableIndex, &PageTableIndex) -> (usize, Option<usize>)`
[INFO] [stdout]                found signature `fn(&PageTableIndex, &PageTableIndex) -> Option<usize>`
[INFO] [stdout] help: change the output type to match the trait
[INFO] [stdout]     |
[INFO] [stdout] 349 -     fn steps_between(start: &Self, end: &Self) -> Option<usize> {
[INFO] [stdout] 349 +     fn steps_between(start: &Self, end: &Self) -> (usize, Option<usize>) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0053`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `x86_64` (lib) due to 2 previous errors
[INFO] [stdout] For more information about this error, try `rustc --explain E0053`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `x86_64` (lib) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "94af1efb4f0c9d0a0555caf6934bd19b60c2e57ef8c5faa8a85d91dd39073b17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94af1efb4f0c9d0a0555caf6934bd19b60c2e57ef8c5faa8a85d91dd39073b17", kill_on_drop: false }`
[INFO] [stdout] 94af1efb4f0c9d0a0555caf6934bd19b60c2e57ef8c5faa8a85d91dd39073b17
