[INFO] cloning repository https://github.com/vkuznetsov/mbtree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vkuznetsov/mbtree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvkuznetsov%2Fmbtree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvkuznetsov%2Fmbtree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 53bcbf90a516eadce95a04daf3b1b91adabdab9b
[INFO] checking vkuznetsov/mbtree against 1.95.0 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvkuznetsov%2Fmbtree" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/vkuznetsov/mbtree
[INFO] finished tweaking git repo https://github.com/vkuznetsov/mbtree
[INFO] tweaked toml for git repo https://github.com/vkuznetsov/mbtree written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/vkuznetsov/mbtree on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/vkuznetsov/mbtree 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mockall_derive v0.11.3
[INFO] [stderr]   Downloaded mockall v0.11.3
[INFO] [stderr]   Downloaded priority-queue v1.3.0
[INFO] [stderr]   Downloaded predicates v2.1.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 908b347ddbf886e3cc141b02a40c36a8bb110f135b2811ea0a78afec9b7c324b
[INFO] running `Command { std: "docker" "start" "-a" "908b347ddbf886e3cc141b02a40c36a8bb110f135b2811ea0a78afec9b7c324b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "908b347ddbf886e3cc141b02a40c36a8bb110f135b2811ea0a78afec9b7c324b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "908b347ddbf886e3cc141b02a40c36a8bb110f135b2811ea0a78afec9b7c324b", kill_on_drop: false }`
[INFO] [stdout] 908b347ddbf886e3cc141b02a40c36a8bb110f135b2811ea0a78afec9b7c324b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fa7a434d638db0b3ecee7af4106ce7ddcb43c9546a2d6fd948a4abcda446df93
[INFO] running `Command { std: "docker" "start" "-a" "fa7a434d638db0b3ecee7af4106ce7ddcb43c9546a2d6fd948a4abcda446df93", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]    Compiling indexmap v1.9.2
[INFO] [stderr]    Compiling syn v1.0.103
[INFO] [stderr]    Compiling priority-queue v1.3.0
[INFO] [stderr]     Checking predicates-core v1.0.5
[INFO] [stderr]     Checking regex-syntax v0.6.28
[INFO] [stderr]     Checking either v1.8.0
[INFO] [stderr]     Checking float-cmp v0.9.0
[INFO] [stderr]     Checking termtree v0.4.0
[INFO] [stderr]     Checking fragile v2.0.0
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking downcast v0.11.0
[INFO] [stderr]     Checking predicates-tree v1.0.7
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]     Checking mbtree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/mm_io/mod.rs:24:11
[INFO] [stdout]    |
[INFO] [stdout] 24 |     IoErr(std::io::Error, &'a str),
[INFO] [stdout]    |     ----- ^^^^^^^^^^^^^^  ^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 24 -     IoErr(std::io::Error, &'a str),
[INFO] [stdout] 24 +     IoErr((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/mm_io/mod.rs:25:13
[INFO] [stdout]    |
[INFO] [stdout] 25 |     MmapErr(&'a str),
[INFO] [stdout]    |     ------- ^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 25 -     MmapErr(&'a str),
[INFO] [stdout] 25 +     MmapErr(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/mm_io/mod.rs:26:18
[INFO] [stdout]    |
[INFO] [stdout] 26 |     TooLargeFile(u64),
[INFO] [stdout]    |     ------------ ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 26 -     TooLargeFile(u64),
[INFO] [stdout] 26 +     TooLargeFile(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Offset` is never used
[INFO] [stdout]  --> src/page/mod.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | type Offset = u16;
[INFO] [stdout]   |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PAGE_SIZE` is never used
[INFO] [stdout]  --> src/page/mod.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | const PAGE_SIZE: usize = 8192;
[INFO] [stdout]   |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `OFFSET_SIZE` is never used
[INFO] [stdout]  --> src/page/mod.rs:6:7
[INFO] [stdout]   |
[INFO] [stdout] 6 | const OFFSET_SIZE: usize = mem::size_of::<Offset>();
[INFO] [stdout]   |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PAGE_HEADER_SIZE` is never used
[INFO] [stdout]  --> src/page/mod.rs:7:7
[INFO] [stdout]   |
[INFO] [stdout] 7 | const PAGE_HEADER_SIZE: usize = OFFSET_SIZE * 2;
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `DATA_SIZE` is never used
[INFO] [stdout]  --> src/page/mod.rs:8:7
[INFO] [stdout]   |
[INFO] [stdout] 8 | const DATA_SIZE: usize = PAGE_SIZE - PAGE_HEADER_SIZE;
[INFO] [stdout]   |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MAX_OFFSET` is never used
[INFO] [stdout]  --> src/page/mod.rs:9:7
[INFO] [stdout]   |
[INFO] [stdout] 9 | const MAX_OFFSET: Offset = PAGE_SIZE as Offset;
[INFO] [stdout]   |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MIN_OFFSET` is never used
[INFO] [stdout]   --> src/page/mod.rs:10:7
[INFO] [stdout]    |
[INFO] [stdout] 10 | const MIN_OFFSET: Offset = PAGE_HEADER_SIZE as Offset;
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Error` is never used
[INFO] [stdout]   --> src/page/mod.rs:13:10
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub enum Error {
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PageHeader` is never constructed
[INFO] [stdout]   --> src/page/mod.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct PageHeader {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Page` is never constructed
[INFO] [stdout]   --> src/page/mod.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | struct Page<T: Ord> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `add`, `get`, `mut_header`, and `header` are never used
[INFO] [stdout]   --> src/page/mod.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 43 | impl<T: Ord> Page<T> {
[INFO] [stdout]    | -------------------- methods in this implementation
[INFO] [stdout] 44 |     pub fn add(&mut self, item: T) -> Result<usize, Error> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     pub fn get(&self, idx: usize) -> &T {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 74 |     fn mut_header(&mut self) -> &mut PageHeader {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 78 |     fn header(&self) -> &PageHeader {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/mm_io/mod.rs:31:26
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn new(filepath: &Path) -> Result<Self, Error> {
[INFO] [stdout]    |                          ^^^^^                  ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                          |
[INFO] [stdout]    |                          the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn new(filepath: &Path) -> Result<Self, Error<'_>> {
[INFO] [stdout]    |                                                      ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/mm_io/mod.rs:62:22
[INFO] [stdout]    |
[INFO] [stdout] 62 |     pub fn insert_at(&mut self, value: &T, idx: usize) -> Result<(), Error> {
[INFO] [stdout]    |                      ^^^^^^^^^ the lifetime is elided here           ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 62 |     pub fn insert_at(&mut self, value: &T, idx: usize) -> Result<(), Error<'_>> {
[INFO] [stdout]    |                                                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/mm_io/mod.rs:75:20
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub fn read_at(&self, idx: usize) -> Result<T, Error> {
[INFO] [stdout]    |                    ^^^^^                           ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub fn read_at(&self, idx: usize) -> Result<T, Error<'_>> {
[INFO] [stdout]    |                                                         ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking regex v1.7.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking predicates v2.1.3
[INFO] [stderr]    Compiling mockall_derive v0.11.3
[INFO] [stderr]     Checking mockall v0.11.3
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/mm_io/mod.rs:24:11
[INFO] [stdout]    |
[INFO] [stdout] 24 |     IoErr(std::io::Error, &'a str),
[INFO] [stdout]    |     ----- ^^^^^^^^^^^^^^  ^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 24 -     IoErr(std::io::Error, &'a str),
[INFO] [stdout] 24 +     IoErr((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/mm_io/mod.rs:25:13
[INFO] [stdout]    |
[INFO] [stdout] 25 |     MmapErr(&'a str),
[INFO] [stdout]    |     ------- ^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 25 -     MmapErr(&'a str),
[INFO] [stdout] 25 +     MmapErr(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/mm_io/mod.rs:26:18
[INFO] [stdout]    |
[INFO] [stdout] 26 |     TooLargeFile(u64),
[INFO] [stdout]    |     ------------ ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 26 -     TooLargeFile(u64),
[INFO] [stdout] 26 +     TooLargeFile(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/mm_io/mod.rs:31:26
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn new(filepath: &Path) -> Result<Self, Error> {
[INFO] [stdout]    |                          ^^^^^                  ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                          |
[INFO] [stdout]    |                          the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn new(filepath: &Path) -> Result<Self, Error<'_>> {
[INFO] [stdout]    |                                                      ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/mm_io/mod.rs:62:22
[INFO] [stdout]    |
[INFO] [stdout] 62 |     pub fn insert_at(&mut self, value: &T, idx: usize) -> Result<(), Error> {
[INFO] [stdout]    |                      ^^^^^^^^^ the lifetime is elided here           ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 62 |     pub fn insert_at(&mut self, value: &T, idx: usize) -> Result<(), Error<'_>> {
[INFO] [stdout]    |                                                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/mm_io/mod.rs:75:20
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub fn read_at(&self, idx: usize) -> Result<T, Error> {
[INFO] [stdout]    |                    ^^^^^                           ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub fn read_at(&self, idx: usize) -> Result<T, Error<'_>> {
[INFO] [stdout]    |                                                         ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.83s
[INFO] running `Command { std: "docker" "inspect" "fa7a434d638db0b3ecee7af4106ce7ddcb43c9546a2d6fd948a4abcda446df93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa7a434d638db0b3ecee7af4106ce7ddcb43c9546a2d6fd948a4abcda446df93", kill_on_drop: false }`
[INFO] [stdout] fa7a434d638db0b3ecee7af4106ce7ddcb43c9546a2d6fd948a4abcda446df93
