[INFO] cloning repository https://github.com/xongxg/lifetime_issues
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/xongxg/lifetime_issues" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxongxg%2Flifetime_issues", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxongxg%2Flifetime_issues'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8afb49f2da3d523c7e5b464c58665c42c8660c9a
[INFO] checking xongxg/lifetime_issues against try#863511eff87e66198b396935f3b5c8a543022f53 for pr-139493-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxongxg%2Flifetime_issues" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/xongxg/lifetime_issues
[INFO] finished tweaking git repo https://github.com/xongxg/lifetime_issues
[INFO] tweaked toml for git repo https://github.com/xongxg/lifetime_issues written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/xongxg/lifetime_issues on toolchain 863511eff87e66198b396935f3b5c8a543022f53
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+863511eff87e66198b396935f3b5c8a543022f53" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/xongxg/lifetime_issues 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" "+863511eff87e66198b396935f3b5c8a543022f53" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+863511eff87e66198b396935f3b5c8a543022f53" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8a8fa35b8b6c283143747a890876bc71b4ce4394c9264eb5c70a3cb80b71a012
[INFO] running `Command { std: "docker" "start" "-a" "8a8fa35b8b6c283143747a890876bc71b4ce4394c9264eb5c70a3cb80b71a012", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8a8fa35b8b6c283143747a890876bc71b4ce4394c9264eb5c70a3cb80b71a012", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a8fa35b8b6c283143747a890876bc71b4ce4394c9264eb5c70a3cb80b71a012", kill_on_drop: false }`
[INFO] [stdout] 8a8fa35b8b6c283143747a890876bc71b4ce4394c9264eb5c70a3cb80b71a012
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+863511eff87e66198b396935f3b5c8a543022f53" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b93c605c1893dcff405cbcae195013ff365e71bca53a351c9a87ddda2da3d8ec
[INFO] running `Command { std: "docker" "start" "-a" "b93c605c1893dcff405cbcae195013ff365e71bca53a351c9a87ddda2da3d8ec", kill_on_drop: false }`
[INFO] [stderr]     Checking lifetime_issues v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Interfaces` is never constructed
[INFO] [stdout]  --> src/mut_borrow.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct Interfaces<'text, 'manager> {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `noop` is never used
[INFO] [stdout]   --> src/mut_borrow.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl<'text, 'manager> Interfaces<'text, 'manager> {
[INFO] [stdout]    | ------------------------------------------------- method in this implementation
[INFO] [stdout] 19 |     pub fn noop(self) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Manager` is never constructed
[INFO] [stdout]   --> src/mut_borrow.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | struct Manager<'text> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `List` is never constructed
[INFO] [stdout]   --> src/mut_borrow.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | struct List<'text> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_interfaces` is never used
[INFO] [stdout]   --> src/mut_borrow.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 40 | impl<'text> List<'text> {
[INFO] [stdout]    | ----------------------- method in this implementation
[INFO] [stdout] 41 |     pub fn get_interfaces<'manager>(&'manager mut self) -> Interfaces<'text, 'manager> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `use_list` is never used
[INFO] [stdout]   --> src/mut_borrow.rs:62:4
[INFO] [stdout]    |
[INFO] [stdout] 62 | fn use_list(list: &List) {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bar` is never used
[INFO] [stdout]   --> src/mut_borrow.rs:69:4
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn bar(writer: &mut Writer) {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `baz` is never used
[INFO] [stdout]   --> src/mut_borrow.rs:74:4
[INFO] [stdout]    |
[INFO] [stdout] 74 | fn baz(writer: &mut Writer) {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Writer` is never constructed
[INFO] [stdout]   --> src/mut_borrow.rs:78:12
[INFO] [stdout]    |
[INFO] [stdout] 78 | pub struct Writer<'a> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `indent` and `write` are never used
[INFO] [stdout]   --> src/mut_borrow.rs:84:8
[INFO] [stdout]    |
[INFO] [stdout] 83 | impl<'a> Writer<'a> {
[INFO] [stdout]    | ------------------- methods in this implementation
[INFO] [stdout] 84 |     fn indent(&mut self) -> Writer {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 91 |     fn write(&mut self, s: &str) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/mut_borrow.rs:84:15
[INFO] [stdout]    |
[INFO] [stdout] 84 |     fn indent(&mut self) -> Writer {
[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] 84 |     fn indent(&mut self) -> Writer<'_> {
[INFO] [stdout]    |                                   ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `manager` is never read
[INFO] [stdout]  --> src/mut_borrow.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct Interfaces<'text, 'manager> {
[INFO] [stdout]   |        ---------- field in this struct
[INFO] [stdout] 9 |     manager: &'manager mut Manager<'text>,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bar` is never used
[INFO] [stdout]   --> src/mut_borrow.rs:69:4
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn bar(writer: &mut Writer) {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `baz` is never used
[INFO] [stdout]   --> src/mut_borrow.rs:74:4
[INFO] [stdout]    |
[INFO] [stdout] 74 | fn baz(writer: &mut Writer) {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Writer` is never constructed
[INFO] [stdout]   --> src/mut_borrow.rs:78:12
[INFO] [stdout]    |
[INFO] [stdout] 78 | pub struct Writer<'a> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `indent` and `write` are never used
[INFO] [stdout]   --> src/mut_borrow.rs:84:8
[INFO] [stdout]    |
[INFO] [stdout] 83 | impl<'a> Writer<'a> {
[INFO] [stdout]    | ------------------- methods in this implementation
[INFO] [stdout] 84 |     fn indent(&mut self) -> Writer {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 91 |     fn write(&mut self, s: &str) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/mut_borrow.rs:84:15
[INFO] [stdout]    |
[INFO] [stdout] 84 |     fn indent(&mut self) -> Writer {
[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] 84 |     fn indent(&mut self) -> Writer<'_> {
[INFO] [stdout]    |                                   ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.15s
[INFO] running `Command { std: "docker" "inspect" "b93c605c1893dcff405cbcae195013ff365e71bca53a351c9a87ddda2da3d8ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b93c605c1893dcff405cbcae195013ff365e71bca53a351c9a87ddda2da3d8ec", kill_on_drop: false }`
[INFO] [stdout] b93c605c1893dcff405cbcae195013ff365e71bca53a351c9a87ddda2da3d8ec