[INFO] cloning repository https://github.com/guijiangheng/learn-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/guijiangheng/learn-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fguijiangheng%2Flearn-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fguijiangheng%2Flearn-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4efc0ebeb618155aa43ca6df762390b94d0bbd30
[INFO] checking guijiangheng/learn-rust against master#cfe9ffcd7c2d63fd3e0fc33a8d23ac4f0d50efe9 for pr-136968
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fguijiangheng%2Flearn-rust" "/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/guijiangheng/learn-rust on toolchain cfe9ffcd7c2d63fd3e0fc33a8d23ac4f0d50efe9
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cfe9ffcd7c2d63fd3e0fc33a8d23ac4f0d50efe9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/guijiangheng/learn-rust
[INFO] finished tweaking git repo https://github.com/guijiangheng/learn-rust
[INFO] tweaked toml for git repo https://github.com/guijiangheng/learn-rust written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/guijiangheng/learn-rust 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" "+cfe9ffcd7c2d63fd3e0fc33a8d23ac4f0d50efe9" "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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+cfe9ffcd7c2d63fd3e0fc33a8d23ac4f0d50efe9" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c0ddb263d5bbe284dc2a2364b60103adf45f752260c0e66ab6715a4efba1d73e
[INFO] running `Command { std: "docker" "start" "-a" "c0ddb263d5bbe284dc2a2364b60103adf45f752260c0e66ab6715a4efba1d73e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c0ddb263d5bbe284dc2a2364b60103adf45f752260c0e66ab6715a4efba1d73e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0ddb263d5bbe284dc2a2364b60103adf45f752260c0e66ab6715a4efba1d73e", kill_on_drop: false }`
[INFO] [stdout] c0ddb263d5bbe284dc2a2364b60103adf45f752260c0e66ab6715a4efba1d73e
[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=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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+cfe9ffcd7c2d63fd3e0fc33a8d23ac4f0d50efe9" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] db2761158874b64caf13e304ec11f65d4dfe1392fa50ee4f76b26b670eadf228
[INFO] running `Command { std: "docker" "start" "-a" "db2761158874b64caf13e304ec11f65d4dfe1392fa50ee4f76b26b670eadf228", kill_on_drop: false }`
[INFO] [stderr]     Checking learn-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]   --> src/hash_set.rs:74:80
[INFO] [stdout]    |
[INFO] [stdout] 74 |     pub fn intersection<'a>(&'a self, other: &'a Self) -> impl Iterator<Item = &T> {
[INFO] [stdout]    |                         -- lifetime `'a` declared here                         ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(elided_named_lifetimes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]   --> src/hash_set.rs:79:78
[INFO] [stdout]    |
[INFO] [stdout] 79 |     pub fn difference<'a>(&'a self, other: &'a Self) -> impl Iterator<Item = &T> {
[INFO] [stdout]    |                       -- lifetime `'a` declared here                         ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]   --> src/hash_set.rs:83:73
[INFO] [stdout]    |
[INFO] [stdout] 83 |     pub fn union<'a>(&'a self, other: &'a Self) -> impl Iterator<Item = &T> {
[INFO] [stdout]    |                  -- lifetime `'a` declared here                         ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]   --> src/hash_set.rs:87:88
[INFO] [stdout]    |
[INFO] [stdout] 87 |     pub fn symmetric_difference<'a>(&'a self, other: &'a Self) -> impl Iterator<Item = &T> {
[INFO] [stdout]    |                                 -- lifetime `'a` declared here                         ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]   --> src/hash_set.rs:74:80
[INFO] [stdout]    |
[INFO] [stdout] 74 |     pub fn intersection<'a>(&'a self, other: &'a Self) -> impl Iterator<Item = &T> {
[INFO] [stdout]    |                         -- lifetime `'a` declared here                         ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(elided_named_lifetimes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]   --> src/hash_set.rs:79:78
[INFO] [stdout]    |
[INFO] [stdout] 79 |     pub fn difference<'a>(&'a self, other: &'a Self) -> impl Iterator<Item = &T> {
[INFO] [stdout]    |                       -- lifetime `'a` declared here                         ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]   --> src/hash_set.rs:83:73
[INFO] [stdout]    |
[INFO] [stdout] 83 |     pub fn union<'a>(&'a self, other: &'a Self) -> impl Iterator<Item = &T> {
[INFO] [stdout]    |                  -- lifetime `'a` declared here                         ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]   --> src/hash_set.rs:87:88
[INFO] [stdout]    |
[INFO] [stdout] 87 |     pub fn symmetric_difference<'a>(&'a self, other: &'a Self) -> impl Iterator<Item = &T> {
[INFO] [stdout]    |                                 -- lifetime `'a` declared here                         ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]   --> src/hash_set.rs:74:80
[INFO] [stdout]    |
[INFO] [stdout] 74 |     pub fn intersection<'a>(&'a self, other: &'a Self) -> impl Iterator<Item = &T> {
[INFO] [stdout]    |                         -- lifetime `'a` declared here                         ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(elided_named_lifetimes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]   --> src/hash_set.rs:79:78
[INFO] [stdout]    |
[INFO] [stdout] 79 |     pub fn difference<'a>(&'a self, other: &'a Self) -> impl Iterator<Item = &T> {
[INFO] [stdout]    |                       -- lifetime `'a` declared here                         ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]   --> src/hash_set.rs:83:73
[INFO] [stdout]    |
[INFO] [stdout] 83 |     pub fn union<'a>(&'a self, other: &'a Self) -> impl Iterator<Item = &T> {
[INFO] [stdout]    |                  -- lifetime `'a` declared here                         ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]   --> src/hash_set.rs:87:88
[INFO] [stdout]    |
[INFO] [stdout] 87 |     pub fn symmetric_difference<'a>(&'a self, other: &'a Self) -> impl Iterator<Item = &T> {
[INFO] [stdout]    |                                 -- lifetime `'a` declared here                         ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]   --> src/hash_set.rs:74:80
[INFO] [stdout]    |
[INFO] [stdout] 74 |     pub fn intersection<'a>(&'a self, other: &'a Self) -> impl Iterator<Item = &T> {
[INFO] [stdout]    |                         -- lifetime `'a` declared here                         ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(elided_named_lifetimes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]   --> src/hash_set.rs:79:78
[INFO] [stdout]    |
[INFO] [stdout] 79 |     pub fn difference<'a>(&'a self, other: &'a Self) -> impl Iterator<Item = &T> {
[INFO] [stdout]    |                       -- lifetime `'a` declared here                         ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]   --> src/hash_set.rs:83:73
[INFO] [stdout]    |
[INFO] [stdout] 83 |     pub fn union<'a>(&'a self, other: &'a Self) -> impl Iterator<Item = &T> {
[INFO] [stdout]    |                  -- lifetime `'a` declared here                         ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]   --> src/hash_set.rs:87:88
[INFO] [stdout]    |
[INFO] [stdout] 87 |     pub fn symmetric_difference<'a>(&'a self, other: &'a Self) -> impl Iterator<Item = &T> {
[INFO] [stdout]    |                                 -- lifetime `'a` declared here                         ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.27s
[INFO] running `Command { std: "docker" "inspect" "db2761158874b64caf13e304ec11f65d4dfe1392fa50ee4f76b26b670eadf228", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db2761158874b64caf13e304ec11f65d4dfe1392fa50ee4f76b26b670eadf228", kill_on_drop: false }`
[INFO] [stdout] db2761158874b64caf13e304ec11f65d4dfe1392fa50ee4f76b26b670eadf228