[INFO] cloning repository https://github.com/hsmtkk/super-duper-octo-potato
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hsmtkk/super-duper-octo-potato" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhsmtkk%2Fsuper-duper-octo-potato", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhsmtkk%2Fsuper-duper-octo-potato'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 17904abdce22b9cdbeb4c401e2bf1cfad5399173
[INFO] checking hsmtkk/super-duper-octo-potato against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhsmtkk%2Fsuper-duper-octo-potato" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hsmtkk/super-duper-octo-potato on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hsmtkk/super-duper-octo-potato
[INFO] finished tweaking git repo https://github.com/hsmtkk/super-duper-octo-potato
[INFO] tweaked toml for git repo https://github.com/hsmtkk/super-duper-octo-potato written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/hsmtkk/super-duper-octo-potato already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3c31e1f3fc9ea2158affa8bb0e655d5481448f85a7f323cbd4dac65a52f503c7
[INFO] running `Command { std: "docker" "start" "-a" "3c31e1f3fc9ea2158affa8bb0e655d5481448f85a7f323cbd4dac65a52f503c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3c31e1f3fc9ea2158affa8bb0e655d5481448f85a7f323cbd4dac65a52f503c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c31e1f3fc9ea2158affa8bb0e655d5481448f85a7f323cbd4dac65a52f503c7", kill_on_drop: false }`
[INFO] [stdout] 3c31e1f3fc9ea2158affa8bb0e655d5481448f85a7f323cbd4dac65a52f503c7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b9f91b593166c4dad86cecee8e2b586c79efc3301496b1208c6e2df1ab01de32
[INFO] running `Command { std: "docker" "start" "-a" "b9f91b593166c4dad86cecee8e2b586c79efc3301496b1208c6e2df1ab01de32", kill_on_drop: false }`
[INFO] [stderr]     Checking average v0.1.0 (/opt/rustwide/workdir/average)
[INFO] [stderr]     Checking char_count v0.1.0 (/opt/rustwide/workdir/char_count)
[INFO] [stderr]     Checking calc_total v0.1.0 (/opt/rustwide/workdir/calc_total)
[INFO] [stderr]     Checking kuku v0.1.0 (/opt/rustwide/workdir/kuku)
[INFO] [stderr]     Checking fizzbuzz v0.1.0 (/opt/rustwide/workdir/fizzbuzz)
[INFO] [stderr]     Checking fibonacci v0.1.0 (/opt/rustwide/workdir/fibonacci)
[INFO] [stdout] warning: function is never used: `new`
[INFO] [stdout]   --> fibonacci/src/fibonacci.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn new() -> impl Calculator {
[INFO] [stdout]    |    ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> fibonacci/src/fibonacci.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn new() -> CalculatorImpl {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `result` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> char_count/src/char_count.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 10 |         if let Some(count) = result.get(&key) {
[INFO] [stdout]    |                              ------ immutable borrow occurs here
[INFO] [stdout] 11 |             result.insert(key, count + 1);
[INFO] [stdout]    |             ^^^^^^             ----- immutable borrow later used here
[INFO] [stdout]    |             |
[INFO] [stdout]    |             mutable borrow occurs here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `count_char`
[INFO] [stdout]  --> char_count/src/char_count.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn count_char(text:&str) -> HashMap<String, i64>{
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `average`
[INFO] [stdout]  --> average/src/average.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn average(scores: Vec<i64>) -> i64 {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `result` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> char_count/src/char_count.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 10 |         if let Some(count) = result.get(&key) {
[INFO] [stdout]    |                              ------ immutable borrow occurs here
[INFO] [stdout] 11 |             result.insert(key, count + 1);
[INFO] [stdout]    |             ^^^^^^             ----- immutable borrow later used here
[INFO] [stdout]    |             |
[INFO] [stdout]    |             mutable borrow occurs here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `new`
[INFO] [stdout]  --> calc_total/src/calc_total.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn new() -> impl Calculator {
[INFO] [stdout]   |    ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> calc_total/src/calc_total.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn new() -> CalculatorImpl {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "b9f91b593166c4dad86cecee8e2b586c79efc3301496b1208c6e2df1ab01de32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9f91b593166c4dad86cecee8e2b586c79efc3301496b1208c6e2df1ab01de32", kill_on_drop: false }`
[INFO] [stdout] b9f91b593166c4dad86cecee8e2b586c79efc3301496b1208c6e2df1ab01de32