[INFO] cloning repository https://github.com/renand3z/cpu-blockchain
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/renand3z/cpu-blockchain" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frenand3z%2Fcpu-blockchain", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frenand3z%2Fcpu-blockchain'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c413a1e3e638786b103202222ebfdcad2d0650a4
[INFO] checking renand3z/cpu-blockchain against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frenand3z%2Fcpu-blockchain" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/renand3z/cpu-blockchain on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/renand3z/cpu-blockchain
[INFO] finished tweaking git repo https://github.com/renand3z/cpu-blockchain
[INFO] tweaked toml for git repo https://github.com/renand3z/cpu-blockchain written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/renand3z/cpu-blockchain 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--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-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a59d358b9ff26eaa0acd765516206ba0f65d12a1422bd4a5d464b27d3eca3a19
[INFO] running `Command { std: "docker" "start" "-a" "a59d358b9ff26eaa0acd765516206ba0f65d12a1422bd4a5d464b27d3eca3a19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a59d358b9ff26eaa0acd765516206ba0f65d12a1422bd4a5d464b27d3eca3a19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a59d358b9ff26eaa0acd765516206ba0f65d12a1422bd4a5d464b27d3eca3a19", kill_on_drop: false }`
[INFO] [stdout] a59d358b9ff26eaa0acd765516206ba0f65d12a1422bd4a5d464b27d3eca3a19
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0254b52f855d463eba88e75cf6ff365cd1ac1daadef6b6f9ced58da89a8794d0
[INFO] running `Command { std: "docker" "start" "-a" "0254b52f855d463eba88e75cf6ff365cd1ac1daadef6b6f9ced58da89a8794d0", kill_on_drop: false }`
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]     Checking rustc-serialize v0.3.25
[INFO] [stderr]     Checking iana-time-zone v0.1.60
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]     Checking chrono v0.4.35
[INFO] [stderr]     Checking cpu-blockchain v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `index`, `data`, `previous_hash`, and `normalized_cycles` are never read
[INFO] [stdout]   --> src/main.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | struct Block {
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] 9  |     index: u64,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 10 |     data: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 11 |     previous_hash: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 12 |     hash: String,
[INFO] [stdout] 13 |     normalized_cycles: u128, // Using normalized CPU cycles as the "timestamp"
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Block` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[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: fields `index`, `data`, `previous_hash`, and `normalized_cycles` are never read
[INFO] [stdout]   --> src/main.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | struct Block {
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] 9  |     index: u64,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 10 |     data: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 11 |     previous_hash: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 12 |     hash: String,
[INFO] [stdout] 13 |     normalized_cycles: u128, // Using normalized CPU cycles as the "timestamp"
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Block` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.66s
[INFO] running `Command { std: "docker" "inspect" "0254b52f855d463eba88e75cf6ff365cd1ac1daadef6b6f9ced58da89a8794d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0254b52f855d463eba88e75cf6ff365cd1ac1daadef6b6f9ced58da89a8794d0", kill_on_drop: false }`
[INFO] [stdout] 0254b52f855d463eba88e75cf6ff365cd1ac1daadef6b6f9ced58da89a8794d0