[INFO] cloning repository https://github.com/Patrick-Poitras/grou_num
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Patrick-Poitras/grou_num" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPatrick-Poitras%2Fgrou_num", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPatrick-Poitras%2Fgrou_num'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 798b3dea442b4e7fb60fc9610b18baa96b88214f
[INFO] building Patrick-Poitras/grou_num/798b3dea442b4e7fb60fc9610b18baa96b88214f against master#44f415c1d617ebc7b931a243b7b321ef8a6ca47c for pr-142134-abi-ast-error
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPatrick-Poitras%2Fgrou_num" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Patrick-Poitras/grou_num on toolchain 44f415c1d617ebc7b931a243b7b321ef8a6ca47c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Patrick-Poitras/grou_num
[INFO] finished tweaking git repo https://github.com/Patrick-Poitras/grou_num
[INFO] tweaked toml for git repo https://github.com/Patrick-Poitras/grou_num written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 71 packages to latest compatible versions
[INFO] [stderr]       Adding criterion v0.3.6 (available: v0.6.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4ad1760c7f80f9a0fd0a9c06a63cbec1e764da57c29449c2e486cc22e1e96605
[INFO] running `Command { std: "docker" "start" "-a" "4ad1760c7f80f9a0fd0a9c06a63cbec1e764da57c29449c2e486cc22e1e96605", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4ad1760c7f80f9a0fd0a9c06a63cbec1e764da57c29449c2e486cc22e1e96605", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ad1760c7f80f9a0fd0a9c06a63cbec1e764da57c29449c2e486cc22e1e96605", kill_on_drop: false }`
[INFO] [stdout] 4ad1760c7f80f9a0fd0a9c06a63cbec1e764da57c29449c2e486cc22e1e96605
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 718b7dce749206777ff705ff086144f4cd5b5269cf08bad298ec55b3d8e78b42
[INFO] running `Command { std: "docker" "start" "-a" "718b7dce749206777ff705ff086144f4cd5b5269cf08bad298ec55b3d8e78b42", kill_on_drop: false }`
[INFO] [stderr]    Compiling grou-num v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `destructuring_assignment` has been stable since 1.59.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(destructuring_assignment)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BlockIterator` is never constructed
[INFO] [stdout]  --> src/block_iterator.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct BlockIterator<'iter> {
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `len` are never used
[INFO] [stdout]   --> src/block_iterator.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl<'iter> BlockIterator<'iter> {
[INFO] [stdout]    | -------------------------------- associated items in this implementation
[INFO] [stdout] 10 |     pub fn new(number: &'iter Grou, block_length: usize) -> BlockIterator {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `unwrap_next` is never used
[INFO] [stdout]   --> src/block_iterator.rs:42:12
[INFO] [stdout]    |
[INFO] [stdout] 41 | impl<'iter> BlockIterator<'iter> {
[INFO] [stdout]    | -------------------------------- method in this implementation
[INFO] [stdout] 42 |     pub fn unwrap_next(&mut self) -> GrouSubset<'iter> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/block_iterator.rs:10:25
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new(number: &'iter Grou, block_length: usize) -> BlockIterator {
[INFO] [stdout]    |                         ^^^^^                               ------------- the lifetime gets resolved as `'iter`
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to consistently use `'iter`
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new(number: &'iter Grou, block_length: usize) -> BlockIterator<'iter> {
[INFO] [stdout]    |                                                                          +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `Command { std: "docker" "inspect" "718b7dce749206777ff705ff086144f4cd5b5269cf08bad298ec55b3d8e78b42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "718b7dce749206777ff705ff086144f4cd5b5269cf08bad298ec55b3d8e78b42", kill_on_drop: false }`
[INFO] [stdout] 718b7dce749206777ff705ff086144f4cd5b5269cf08bad298ec55b3d8e78b42
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8cd1df5421c075cc1b8e9607d8ee65bd365be2e1cf77463a5a96413ac4606db3
[INFO] running `Command { std: "docker" "start" "-a" "8cd1df5421c075cc1b8e9607d8ee65bd365be2e1cf77463a5a96413ac4606db3", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling crossbeam-utils v0.8.21
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling unicode-ident v1.0.18
[INFO] [stderr]    Compiling memchr v2.7.4
[INFO] [stderr]    Compiling autocfg v1.4.0
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]    Compiling serde_json v1.0.140
[INFO] [stderr]    Compiling ryu v1.0.20
[INFO] [stderr]    Compiling libc v0.2.172
[INFO] [stderr]    Compiling itoa v1.0.15
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling unicode-width v0.1.14
[INFO] [stderr]    Compiling plotters-backend v0.3.7
[INFO] [stderr]    Compiling regex-syntax v0.8.5
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling half v1.8.3
[INFO] [stderr]    Compiling cast v0.3.0
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling oorandom v11.1.5
[INFO] [stderr]    Compiling lazy_static v1.5.0
[INFO] [stderr]    Compiling walkdir v2.5.0
[INFO] [stderr]    Compiling plotters-svg v0.3.7
[INFO] [stdout] warning: the feature `destructuring_assignment` has been stable since 1.59.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(destructuring_assignment)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BlockIterator` is never constructed
[INFO] [stdout]  --> src/block_iterator.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct BlockIterator<'iter> {
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `len` are never used
[INFO] [stdout]   --> src/block_iterator.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl<'iter> BlockIterator<'iter> {
[INFO] [stdout]    | -------------------------------- associated items in this implementation
[INFO] [stdout] 10 |     pub fn new(number: &'iter Grou, block_length: usize) -> BlockIterator {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `unwrap_next` is never used
[INFO] [stdout]   --> src/block_iterator.rs:42:12
[INFO] [stdout]    |
[INFO] [stdout] 41 | impl<'iter> BlockIterator<'iter> {
[INFO] [stdout]    | -------------------------------- method in this implementation
[INFO] [stdout] 42 |     pub fn unwrap_next(&mut self) -> GrouSubset<'iter> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/block_iterator.rs:10:25
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new(number: &'iter Grou, block_length: usize) -> BlockIterator {
[INFO] [stdout]    |                         ^^^^^                               ------------- the lifetime gets resolved as `'iter`
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to consistently use `'iter`
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new(number: &'iter Grou, block_length: usize) -> BlockIterator<'iter> {
[INFO] [stdout]    |                                                                          +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling csv-core v0.1.12
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling crossbeam-deque v0.8.6
[INFO] [stderr]    Compiling regex-automata v0.4.9
[INFO] [stderr]    Compiling syn v2.0.101
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling plotters v0.3.7
[INFO] [stderr]    Compiling rayon v1.10.0
[INFO] [stderr]    Compiling criterion-plot v0.4.5
[INFO] [stderr]    Compiling regex v1.11.1
[INFO] [stderr]    Compiling csv v1.3.1
[INFO] [stderr]    Compiling serde_cbor v0.11.2
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling criterion v0.3.6
[INFO] [stderr]    Compiling grou-num v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `destructuring_assignment` has been stable since 1.59.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(destructuring_assignment)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BlockIterator` is never constructed
[INFO] [stdout]  --> src/block_iterator.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct BlockIterator<'iter> {
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `len` are never used
[INFO] [stdout]   --> src/block_iterator.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl<'iter> BlockIterator<'iter> {
[INFO] [stdout]    | -------------------------------- associated items in this implementation
[INFO] [stdout] 10 |     pub fn new(number: &'iter Grou, block_length: usize) -> BlockIterator {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `unwrap_next` is never used
[INFO] [stdout]   --> src/block_iterator.rs:42:12
[INFO] [stdout]    |
[INFO] [stdout] 41 | impl<'iter> BlockIterator<'iter> {
[INFO] [stdout]    | -------------------------------- method in this implementation
[INFO] [stdout] 42 |     pub fn unwrap_next(&mut self) -> GrouSubset<'iter> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/block_iterator.rs:10:25
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new(number: &'iter Grou, block_length: usize) -> BlockIterator {
[INFO] [stdout]    |                         ^^^^^                               ------------- the lifetime gets resolved as `'iter`
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to consistently use `'iter`
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new(number: &'iter Grou, block_length: usize) -> BlockIterator<'iter> {
[INFO] [stdout]    |                                                                          +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 28.98s
[INFO] running `Command { std: "docker" "inspect" "8cd1df5421c075cc1b8e9607d8ee65bd365be2e1cf77463a5a96413ac4606db3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8cd1df5421c075cc1b8e9607d8ee65bd365be2e1cf77463a5a96413ac4606db3", kill_on_drop: false }`
[INFO] [stdout] 8cd1df5421c075cc1b8e9607d8ee65bd365be2e1cf77463a5a96413ac4606db3