[INFO] cloning repository https://github.com/henghuang/rust-image-to-ascii
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/henghuang/rust-image-to-ascii" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhenghuang%2Frust-image-to-ascii", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhenghuang%2Frust-image-to-ascii'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b4310ee608094b81479e91fd32fde73e4f662e38
[INFO] checking henghuang/rust-image-to-ascii against master#339e19697a39a78f4d669c217b7d21109215de41 for pr-81213
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhenghuang%2Frust-image-to-ascii" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/henghuang/rust-image-to-ascii on toolchain 339e19697a39a78f4d669c217b7d21109215de41
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+339e19697a39a78f4d669c217b7d21109215de41" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/henghuang/rust-image-to-ascii
[INFO] finished tweaking git repo https://github.com/henghuang/rust-image-to-ascii
[INFO] tweaked toml for git repo https://github.com/henghuang/rust-image-to-ascii written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/henghuang/rust-image-to-ascii already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+339e19697a39a78f4d669c217b7d21109215de41" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+339e19697a39a78f4d669c217b7d21109215de41" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 23a733b42cb4a92fa20de4bf17c753923a7d2973be62f34048c4b6756ad34e6c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "23a733b42cb4a92fa20de4bf17c753923a7d2973be62f34048c4b6756ad34e6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "23a733b42cb4a92fa20de4bf17c753923a7d2973be62f34048c4b6756ad34e6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23a733b42cb4a92fa20de4bf17c753923a7d2973be62f34048c4b6756ad34e6c", kill_on_drop: false }`
[INFO] [stdout] 23a733b42cb4a92fa20de4bf17c753923a7d2973be62f34048c4b6756ad34e6c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+339e19697a39a78f4d669c217b7d21109215de41" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3bc5eba40b84c557bf81f6812814a8365ba30282f94da9a8db254e595ccfceb7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "3bc5eba40b84c557bf81f6812814a8365ba30282f94da9a8db254e595ccfceb7", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling num-rational v0.3.0
[INFO] [stderr]     Checking num-iter v0.1.41
[INFO] [stderr]     Checking image v0.23.6
[INFO] [stderr]     Checking rust-image-to-ascii v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `print_ascii_codes_str`
[INFO] [stdout]   --> src/functions.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub fn print_ascii_codes_str(&self) -> String {
[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: `print_ascii_codes_str`
[INFO] [stdout]   --> src/functions.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub fn print_ascii_codes_str(&self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.35s
[INFO] running `Command { std: "docker" "inspect" "3bc5eba40b84c557bf81f6812814a8365ba30282f94da9a8db254e595ccfceb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3bc5eba40b84c557bf81f6812814a8365ba30282f94da9a8db254e595ccfceb7", kill_on_drop: false }`
[INFO] [stdout] 3bc5eba40b84c557bf81f6812814a8365ba30282f94da9a8db254e595ccfceb7