[INFO] cloning repository https://github.com/smac330/Supplement-P2_6
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/smac330/Supplement-P2_6" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsmac330%2FSupplement-P2_6", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsmac330%2FSupplement-P2_6'...
[INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsmac330%2FSupplement-P2_6: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 1)
[INFO] cloning repository https://github.com/smac330/Supplement-P2_6
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/smac330/Supplement-P2_6" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsmac330%2FSupplement-P2_6", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsmac330%2FSupplement-P2_6'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 39c15b9d10b679555413796821fba3fd4f41c04f
[INFO] checking smac330/Supplement-P2_6 against master#ca77504943887037504c7fc0b9bf06dab3910373 for pr-145181
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsmac330%2FSupplement-P2_6" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/smac330/Supplement-P2_6
[INFO] finished tweaking git repo https://github.com/smac330/Supplement-P2_6
[INFO] tweaked toml for git repo https://github.com/smac330/Supplement-P2_6 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/smac330/Supplement-P2_6 on toolchain ca77504943887037504c7fc0b9bf06dab3910373
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ca77504943887037504c7fc0b9bf06dab3910373" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/smac330/Supplement-P2_6 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" "+ca77504943887037504c7fc0b9bf06dab3910373" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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:ae6f63d130afcfff7f91f5ba9fdb2a74d52830289c6a2ea2d23a94dcfb480a0d" "/opt/rustwide/cargo-home/bin/cargo" "+ca77504943887037504c7fc0b9bf06dab3910373" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0fd1ac17e0cd4b8882e4d7eff461fa53247f06bf1912ee4962bf86d078db8cf7
[INFO] running `Command { std: "docker" "start" "-a" "0fd1ac17e0cd4b8882e4d7eff461fa53247f06bf1912ee4962bf86d078db8cf7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0fd1ac17e0cd4b8882e4d7eff461fa53247f06bf1912ee4962bf86d078db8cf7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0fd1ac17e0cd4b8882e4d7eff461fa53247f06bf1912ee4962bf86d078db8cf7", kill_on_drop: false }`
[INFO] [stdout] 0fd1ac17e0cd4b8882e4d7eff461fa53247f06bf1912ee4962bf86d078db8cf7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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:ae6f63d130afcfff7f91f5ba9fdb2a74d52830289c6a2ea2d23a94dcfb480a0d" "/opt/rustwide/cargo-home/bin/cargo" "+ca77504943887037504c7fc0b9bf06dab3910373" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9c3128e91e65972caaf8fd1562a09e18f0cf49207e9b41248faffb8705fcdc34
[INFO] running `Command { std: "docker" "start" "-a" "9c3128e91e65972caaf8fd1562a09e18f0cf49207e9b41248faffb8705fcdc34", kill_on_drop: false }`
[INFO] [stderr]     Checking supplement_p2_6 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `reverse_string` is never used
[INFO] [stdout]  --> src/lib.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn reverse_string(input: &str) -> String {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_reverse_string` is never used
[INFO] [stdout]  --> src/test.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn test_reverse_string() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_palindrome` is never used
[INFO] [stdout]   --> src/lib.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn is_palindrome(input: &str) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_is_palindrome` is never used
[INFO] [stdout]   --> src/test.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn test_is_palindrome() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `most_common_chars` is never used
[INFO] [stdout]   --> src/lib.rs:31:4
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn most_common_chars(input: &str) -> Vec<(char, usize)> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_most_common_chars` is never used
[INFO] [stdout]   --> src/test.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn test_most_common_chars() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/lib.rs:53:4
[INFO] [stdout]    |
[INFO] [stdout] 53 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_reverse_string` is never used
[INFO] [stdout]  --> src/test.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn test_reverse_string() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_is_palindrome` is never used
[INFO] [stdout]   --> src/test.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn test_is_palindrome() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_most_common_chars` is never used
[INFO] [stdout]   --> src/test.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn test_most_common_chars() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `Command { std: "docker" "inspect" "9c3128e91e65972caaf8fd1562a09e18f0cf49207e9b41248faffb8705fcdc34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c3128e91e65972caaf8fd1562a09e18f0cf49207e9b41248faffb8705fcdc34", kill_on_drop: false }`
[INFO] [stdout] 9c3128e91e65972caaf8fd1562a09e18f0cf49207e9b41248faffb8705fcdc34