[INFO] cloning repository https://github.com/AJTJ/rust_problems
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AJTJ/rust_problems" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAJTJ%2Frust_problems", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAJTJ%2Frust_problems'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 73d6adaabb628c17d152e69cb1422d57ef76b9db
[INFO] testing AJTJ/rust_problems against master#733b47ea4b1b86216f14ef56e49440c33933f230+rustflags=-Copt-level=3 for pr-138759
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAJTJ%2Frust_problems" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/AJTJ/rust_problems
[INFO] finished tweaking git repo https://github.com/AJTJ/rust_problems
[INFO] tweaked toml for git repo https://github.com/AJTJ/rust_problems written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/AJTJ/rust_problems on toolchain 733b47ea4b1b86216f14ef56e49440c33933f230
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/AJTJ/rust_problems 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" "+733b47ea4b1b86216f14ef56e49440c33933f230" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b1c9502c1006c7cacb9892430f517ff6945f2a603673a0649fa167f721fbf24b
[INFO] running `Command { std: "docker" "start" "-a" "b1c9502c1006c7cacb9892430f517ff6945f2a603673a0649fa167f721fbf24b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b1c9502c1006c7cacb9892430f517ff6945f2a603673a0649fa167f721fbf24b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1c9502c1006c7cacb9892430f517ff6945f2a603673a0649fa167f721fbf24b", kill_on_drop: false }`
[INFO] [stdout] b1c9502c1006c7cacb9892430f517ff6945f2a603673a0649fa167f721fbf24b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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 -Copt-level=3" "-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" "+733b47ea4b1b86216f14ef56e49440c33933f230" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 928f68a716c6916110d0b1cc0529b90b201d2f4be3ceada1ea605d022808fc8f
[INFO] running `Command { std: "docker" "start" "-a" "928f68a716c6916110d0b1cc0529b90b201d2f4be3ceada1ea605d022808fc8f", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_problems v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `second_value`
[INFO] [stdout]  --> src/main.rs:6:17
[INFO] [stdout]   |
[INFO] [stdout] 6 |         let mut second_value: Option<i32> = None;
[INFO] [stdout]   |                 ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_second_value`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]  --> src/main.rs:8:14
[INFO] [stdout]   |
[INFO] [stdout] 8 |         for (i, x) in nums.iter().enumerate() {
[INFO] [stdout]   |              ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main.rs:12:18
[INFO] [stdout]    |
[INFO] [stdout] 12 |             for (i, y) in nums.iter().enumerate() {
[INFO] [stdout]    |                  ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/main.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 |         let mut first_index: Option<i32> = None;
[INFO] [stdout]   |             ----^^^^^^^^^^^
[INFO] [stdout]   |             |
[INFO] [stdout]   |             help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/main.rs:6:13
[INFO] [stdout]   |
[INFO] [stdout] 6 |         let mut second_value: Option<i32> = None;
[INFO] [stdout]   |             ----^^^^^^^^^^^^
[INFO] [stdout]   |             |
[INFO] [stdout]   |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "928f68a716c6916110d0b1cc0529b90b201d2f4be3ceada1ea605d022808fc8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "928f68a716c6916110d0b1cc0529b90b201d2f4be3ceada1ea605d022808fc8f", kill_on_drop: false }`
[INFO] [stdout] 928f68a716c6916110d0b1cc0529b90b201d2f4be3ceada1ea605d022808fc8f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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 -Copt-level=3" "-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" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3a6746797d5d1408877706dd5f50d84a8fe9fbd6c1952814d70b8f6d2401258b
[INFO] running `Command { std: "docker" "start" "-a" "3a6746797d5d1408877706dd5f50d84a8fe9fbd6c1952814d70b8f6d2401258b", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_problems v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `second_value`
[INFO] [stdout]  --> src/main.rs:6:17
[INFO] [stdout]   |
[INFO] [stdout] 6 |         let mut second_value: Option<i32> = None;
[INFO] [stdout]   |                 ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_second_value`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]  --> src/main.rs:8:14
[INFO] [stdout]   |
[INFO] [stdout] 8 |         for (i, x) in nums.iter().enumerate() {
[INFO] [stdout]   |              ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main.rs:12:18
[INFO] [stdout]    |
[INFO] [stdout] 12 |             for (i, y) in nums.iter().enumerate() {
[INFO] [stdout]    |                  ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/main.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 |         let mut first_index: Option<i32> = None;
[INFO] [stdout]   |             ----^^^^^^^^^^^
[INFO] [stdout]   |             |
[INFO] [stdout]   |             help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/main.rs:6:13
[INFO] [stdout]   |
[INFO] [stdout] 6 |         let mut second_value: Option<i32> = None;
[INFO] [stdout]   |             ----^^^^^^^^^^^^
[INFO] [stdout]   |             |
[INFO] [stdout]   |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `Command { std: "docker" "inspect" "3a6746797d5d1408877706dd5f50d84a8fe9fbd6c1952814d70b8f6d2401258b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a6746797d5d1408877706dd5f50d84a8fe9fbd6c1952814d70b8f6d2401258b", kill_on_drop: false }`
[INFO] [stdout] 3a6746797d5d1408877706dd5f50d84a8fe9fbd6c1952814d70b8f6d2401258b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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 -Copt-level=3" "-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" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 72a83f9a52e3b72b5ff25cbb6ae6b10e20b13e6d30a8d25b3da010dc517a8fe3
[INFO] running `Command { std: "docker" "start" "-a" "72a83f9a52e3b72b5ff25cbb6ae6b10e20b13e6d30a8d25b3da010dc517a8fe3", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `second_value`
[INFO] [stderr]  --> src/main.rs:6:17
[INFO] [stderr]   |
[INFO] [stderr] 6 |         let mut second_value: Option<i32> = None;
[INFO] [stderr]   |                 ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_second_value`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]  --> src/main.rs:8:14
[INFO] [stderr]   |
[INFO] [stderr] 8 |         for (i, x) in nums.iter().enumerate() {
[INFO] [stderr]   |              ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/main.rs:12:18
[INFO] [stderr]    |
[INFO] [stderr] 12 |             for (i, y) in nums.iter().enumerate() {
[INFO] [stderr]    |                  ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/main.rs:3:13
[INFO] [stderr]   |
[INFO] [stderr] 3 |         let mut first_index: Option<i32> = None;
[INFO] [stderr]   |             ----^^^^^^^^^^^
[INFO] [stderr]   |             |
[INFO] [stderr]   |             help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/main.rs:6:13
[INFO] [stderr]   |
[INFO] [stderr] 6 |         let mut second_value: Option<i32> = None;
[INFO] [stderr]   |             ----^^^^^^^^^^^^
[INFO] [stderr]   |             |
[INFO] [stderr]   |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_problems` (bin "rust_problems" test) generated 5 warnings (run `cargo fix --bin "rust_problems" --tests` to apply 2 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_problems-65acaf59d8e5811c)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "72a83f9a52e3b72b5ff25cbb6ae6b10e20b13e6d30a8d25b3da010dc517a8fe3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72a83f9a52e3b72b5ff25cbb6ae6b10e20b13e6d30a8d25b3da010dc517a8fe3", kill_on_drop: false }`
[INFO] [stdout] 72a83f9a52e3b72b5ff25cbb6ae6b10e20b13e6d30a8d25b3da010dc517a8fe3
