[INFO] cloning repository https://github.com/wesley-lewis/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/wesley-lewis/learn-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwesley-lewis%2Flearn-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwesley-lewis%2Flearn-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 49f4acd5765f16535d8a94ae7ce5cb00ef292453
[INFO] checking wesley-lewis/learn-rust against try#e90f1ff63e694965281f833819a486da29772bdf for pr-146167
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwesley-lewis%2Flearn-rust" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/wesley-lewis/learn-rust
[INFO] finished tweaking git repo https://github.com/wesley-lewis/learn-rust
[INFO] tweaked toml for git repo https://github.com/wesley-lewis/learn-rust written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/wesley-lewis/learn-rust on toolchain e90f1ff63e694965281f833819a486da29772bdf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e90f1ff63e694965281f833819a486da29772bdf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/wesley-lewis/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" "+e90f1ff63e694965281f833819a486da29772bdf" "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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+e90f1ff63e694965281f833819a486da29772bdf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4758406bbc0ea15d5b6ec34bfec35e04d847c741ee96fb034d9ea8cd83649789
[INFO] running `Command { std: "docker" "start" "-a" "4758406bbc0ea15d5b6ec34bfec35e04d847c741ee96fb034d9ea8cd83649789", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4758406bbc0ea15d5b6ec34bfec35e04d847c741ee96fb034d9ea8cd83649789", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4758406bbc0ea15d5b6ec34bfec35e04d847c741ee96fb034d9ea8cd83649789", kill_on_drop: false }`
[INFO] [stdout] 4758406bbc0ea15d5b6ec34bfec35e04d847c741ee96fb034d9ea8cd83649789
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+e90f1ff63e694965281f833819a486da29772bdf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 66f28f5fb36fb26a2df11eaf86df63f6a2a7d3ecc4f5e0ab36a3e13eabd1528e
[INFO] running `Command { std: "docker" "start" "-a" "66f28f5fb36fb26a2df11eaf86df63f6a2a7d3ecc4f5e0ab36a3e13eabd1528e", kill_on_drop: false }`
[INFO] [stderr]     Checking learn-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `parser`
[INFO] [stdout]  --> src/advanced_lifetimes.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let parser = Parser {context: &context };
[INFO] [stdout]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_parser`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parser`
[INFO] [stdout]  --> src/advanced_lifetimes.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let parser = Parser {context: &context };
[INFO] [stdout]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_parser`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/advanced_lifetimes.rs:22:27
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn parse_context(context: Context) -> Result<(), &str> {
[INFO] [stdout]    |                           ^^^^^^^                ^^^^ the same lifetime is elided here
[INFO] [stdout]    |                           |
[INFO] [stdout]    |                           the lifetime is hidden 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] 22 | fn parse_context(context: Context<'_>) -> Result<(), &str> {
[INFO] [stdout]    |                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/advanced_lifetimes.rs:22:27
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn parse_context(context: Context) -> Result<(), &str> {
[INFO] [stdout]    |                           ^^^^^^^                ^^^^ the same lifetime is elided here
[INFO] [stdout]    |                           |
[INFO] [stdout]    |                           the lifetime is hidden 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] 22 | fn parse_context(context: Context<'_>) -> Result<(), &str> {
[INFO] [stdout]    |                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] running `Command { std: "docker" "inspect" "66f28f5fb36fb26a2df11eaf86df63f6a2a7d3ecc4f5e0ab36a3e13eabd1528e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66f28f5fb36fb26a2df11eaf86df63f6a2a7d3ecc4f5e0ab36a3e13eabd1528e", kill_on_drop: false }`
[INFO] [stdout] 66f28f5fb36fb26a2df11eaf86df63f6a2a7d3ecc4f5e0ab36a3e13eabd1528e