[INFO] cloning repository https://github.com/kalilovsky/Rust_exercises
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kalilovsky/Rust_exercises" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkalilovsky%2FRust_exercises", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkalilovsky%2FRust_exercises'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c14bedc1f8c7733ecbeab94f4a3789f2b05e2996
[INFO] testing kalilovsky/Rust_exercises against try#028592fec99e54cc92def5a2a849c673b066dd93 for pr-146098
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkalilovsky%2FRust_exercises" "/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/kalilovsky/Rust_exercises
[INFO] finished tweaking git repo https://github.com/kalilovsky/Rust_exercises
[INFO] tweaked toml for git repo https://github.com/kalilovsky/Rust_exercises written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kalilovsky/Rust_exercises on toolchain 028592fec99e54cc92def5a2a849c673b066dd93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+028592fec99e54cc92def5a2a849c673b066dd93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kalilovsky/Rust_exercises 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" "+028592fec99e54cc92def5a2a849c673b066dd93" "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
[ERROR] error running command: no output for 300 seconds
[INFO] testing kalilovsky/Rust_exercises against try#028592fec99e54cc92def5a2a849c673b066dd93 for pr-146098
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkalilovsky%2FRust_exercises" "/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/kalilovsky/Rust_exercises
[INFO] finished tweaking git repo https://github.com/kalilovsky/Rust_exercises
[INFO] tweaked toml for git repo https://github.com/kalilovsky/Rust_exercises written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kalilovsky/Rust_exercises on toolchain 028592fec99e54cc92def5a2a849c673b066dd93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+028592fec99e54cc92def5a2a849c673b066dd93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kalilovsky/Rust_exercises 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" "+028592fec99e54cc92def5a2a849c673b066dd93" "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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+028592fec99e54cc92def5a2a849c673b066dd93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b55036a0f760a924ff1d131961618d2c973d4b9c59585efe9116a53750263549
[INFO] running `Command { std: "docker" "start" "-a" "b55036a0f760a924ff1d131961618d2c973d4b9c59585efe9116a53750263549", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b55036a0f760a924ff1d131961618d2c973d4b9c59585efe9116a53750263549", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b55036a0f760a924ff1d131961618d2c973d4b9c59585efe9116a53750263549", kill_on_drop: false }`
[INFO] [stdout] b55036a0f760a924ff1d131961618d2c973d4b9c59585efe9116a53750263549
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+028592fec99e54cc92def5a2a849c673b066dd93" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 80e8c5ede976f479d5c87ebc04b12c86d265c4ed5ceaaf3599be88f249ce1a98
[INFO] running `Command { std: "docker" "start" "-a" "80e8c5ede976f479d5c87ebc04b12c86d265c4ed5ceaaf3599be88f249ce1a98", kill_on_drop: false }`
[INFO] [stderr]    Compiling Count_occurences v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `iterators` is never used
[INFO] [stdout]   --> src/main.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn iterators(){
[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 `count_occurrences` is never used
[INFO] [stdout]   --> src/main.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn count_occurrences() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.16s
[INFO] running `Command { std: "docker" "inspect" "80e8c5ede976f479d5c87ebc04b12c86d265c4ed5ceaaf3599be88f249ce1a98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80e8c5ede976f479d5c87ebc04b12c86d265c4ed5ceaaf3599be88f249ce1a98", kill_on_drop: false }`
[INFO] [stdout] 80e8c5ede976f479d5c87ebc04b12c86d265c4ed5ceaaf3599be88f249ce1a98
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+028592fec99e54cc92def5a2a849c673b066dd93" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 23f093ee5e7584129f62fae6386ee2636c317551c24d3c513c39f8c7f1b081eb
[INFO] running `Command { std: "docker" "start" "-a" "23f093ee5e7584129f62fae6386ee2636c317551c24d3c513c39f8c7f1b081eb", kill_on_drop: false }`
[INFO] [stderr]    Compiling Count_occurences v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `iterators` is never used
[INFO] [stdout]   --> src/main.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn iterators(){
[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 `count_occurrences` is never used
[INFO] [stdout]   --> src/main.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn count_occurrences() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "23f093ee5e7584129f62fae6386ee2636c317551c24d3c513c39f8c7f1b081eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23f093ee5e7584129f62fae6386ee2636c317551c24d3c513c39f8c7f1b081eb", kill_on_drop: false }`
[INFO] [stdout] 23f093ee5e7584129f62fae6386ee2636c317551c24d3c513c39f8c7f1b081eb
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+028592fec99e54cc92def5a2a849c673b066dd93" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ae82e7c9ae1d1a8b06176f031424495c81c265ffc9acfb1428dbad0afca27b7f
[INFO] running `Command { std: "docker" "start" "-a" "ae82e7c9ae1d1a8b06176f031424495c81c265ffc9acfb1428dbad0afca27b7f", kill_on_drop: false }`
[INFO] [stderr] warning: function `iterators` is never used
[INFO] [stderr]   --> src/main.rs:29:4
[INFO] [stderr]    |
[INFO] [stderr] 29 | fn iterators(){
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `count_occurrences` is never used
[INFO] [stderr]   --> src/main.rs:41:4
[INFO] [stderr]    |
[INFO] [stderr] 41 | fn count_occurrences() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `Count_occurences` (bin "Count_occurences" test) generated 2 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/Count_occurences-0b92ccfbf7c9a57e)
[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" "ae82e7c9ae1d1a8b06176f031424495c81c265ffc9acfb1428dbad0afca27b7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae82e7c9ae1d1a8b06176f031424495c81c265ffc9acfb1428dbad0afca27b7f", kill_on_drop: false }`
[INFO] [stdout] ae82e7c9ae1d1a8b06176f031424495c81c265ffc9acfb1428dbad0afca27b7f