[INFO] cloning repository https://github.com/fmoletta/Programming_Bitcoin
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fmoletta/Programming_Bitcoin" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffmoletta%2FProgramming_Bitcoin", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffmoletta%2FProgramming_Bitcoin'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ddc5621850807b5530b76210fab4c10da399b650
[INFO] checking fmoletta/Programming_Bitcoin against try#0de49ae9e81f9a1e7df6f0783824ce94ed18e8a9 for pr-147185
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffmoletta%2FProgramming_Bitcoin" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/fmoletta/Programming_Bitcoin
[INFO] finished tweaking git repo https://github.com/fmoletta/Programming_Bitcoin
[INFO] tweaked toml for git repo https://github.com/fmoletta/Programming_Bitcoin written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/fmoletta/Programming_Bitcoin on toolchain 0de49ae9e81f9a1e7df6f0783824ce94ed18e8a9
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0de49ae9e81f9a1e7df6f0783824ce94ed18e8a9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/fmoletta/Programming_Bitcoin 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" "+0de49ae9e81f9a1e7df6f0783824ce94ed18e8a9" "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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+0de49ae9e81f9a1e7df6f0783824ce94ed18e8a9" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6e30e1eeb28f8ccefb239b8b975cd3dce19d09fc2d80a12370299c7f84ea574e
[INFO] running `Command { std: "docker" "start" "-a" "6e30e1eeb28f8ccefb239b8b975cd3dce19d09fc2d80a12370299c7f84ea574e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6e30e1eeb28f8ccefb239b8b975cd3dce19d09fc2d80a12370299c7f84ea574e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e30e1eeb28f8ccefb239b8b975cd3dce19d09fc2d80a12370299c7f84ea574e", kill_on_drop: false }`
[INFO] [stdout] 6e30e1eeb28f8ccefb239b8b975cd3dce19d09fc2d80a12370299c7f84ea574e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+0de49ae9e81f9a1e7df6f0783824ce94ed18e8a9" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a459d4a926146832516db6de5184f3c85702f7fd0f113931ee98954f2e7c27ec
[INFO] running `Command { std: "docker" "start" "-a" "a459d4a926146832516db6de5184f3c85702f7fd0f113931ee98954f2e7c27ec", kill_on_drop: false }`
[INFO] [stderr]     Checking programming_bitcoin v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `FieldElement` is never constructed
[INFO] [stdout]  --> src/field_element.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct FieldElement {
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `pow` are never used
[INFO] [stdout]   --> src/field_element.rs:50:12
[INFO] [stdout]    |
[INFO] [stdout] 49 | impl FieldElement {
[INFO] [stdout]    | ----------------- associated items in this implementation
[INFO] [stdout] 50 |     pub fn new(elem: i64, prime: i64) -> FieldElement {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     pub fn pow(self, num: i64) -> FieldElement {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `Command { std: "docker" "inspect" "a459d4a926146832516db6de5184f3c85702f7fd0f113931ee98954f2e7c27ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a459d4a926146832516db6de5184f3c85702f7fd0f113931ee98954f2e7c27ec", kill_on_drop: false }`
[INFO] [stdout] a459d4a926146832516db6de5184f3c85702f7fd0f113931ee98954f2e7c27ec