[INFO] cloning repository https://github.com/ttsang2111/rust-blockchain
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ttsang2111/rust-blockchain" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fttsang2111%2Frust-blockchain", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fttsang2111%2Frust-blockchain'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9d095f174e74bb1418cff78180faf15b2887c501
[INFO] checking ttsang2111/rust-blockchain against master#b56aaec52bc0fa35591a872fb4aac81f606e265c for pr-122661-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fttsang2111%2Frust-blockchain" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ttsang2111/rust-blockchain
[INFO] finished tweaking git repo https://github.com/ttsang2111/rust-blockchain
[INFO] tweaked toml for git repo https://github.com/ttsang2111/rust-blockchain written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ttsang2111/rust-blockchain on toolchain b56aaec52bc0fa35591a872fb4aac81f606e265c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b56aaec52bc0fa35591a872fb4aac81f606e265c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ttsang2111/rust-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" "+b56aaec52bc0fa35591a872fb4aac81f606e265c" "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-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+b56aaec52bc0fa35591a872fb4aac81f606e265c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 745be6dbbee325ff9a2e96fa55280f09c653b0fb63fc540368a1f7486e9bea50
[INFO] running `Command { std: "docker" "start" "-a" "745be6dbbee325ff9a2e96fa55280f09c653b0fb63fc540368a1f7486e9bea50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "745be6dbbee325ff9a2e96fa55280f09c653b0fb63fc540368a1f7486e9bea50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "745be6dbbee325ff9a2e96fa55280f09c653b0fb63fc540368a1f7486e9bea50", kill_on_drop: false }`
[INFO] [stdout] 745be6dbbee325ff9a2e96fa55280f09c653b0fb63fc540368a1f7486e9bea50
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+b56aaec52bc0fa35591a872fb4aac81f606e265c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f28fdbe8085645fdf11baf7a7b4f5f8d85c17ba842142c8f1636555a1b677631
[INFO] running `Command { std: "docker" "start" "-a" "f28fdbe8085645fdf11baf7a7b4f5f8d85c17ba842142c8f1636555a1b677631", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling typenum v1.17.0
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]     Checking cpufeatures v0.2.12
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking iana-time-zone v0.1.60
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]     Checking chrono v0.4.34
[INFO] [stderr]     Checking block-buffer v0.10.4
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking sha2 v0.10.8
[INFO] [stderr]     Checking blockchain v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `index`, `timestamp`, `data`, and `previous_hash` are never read
[INFO] [stdout]  --> src/block.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Block {
[INFO] [stdout]   |            ----- fields in this struct
[INFO] [stdout] 5 |     pub index: u64,
[INFO] [stdout]   |         ^^^^^
[INFO] [stdout] 6 |     pub timestamp: DateTime<Utc>,
[INFO] [stdout]   |         ^^^^^^^^^
[INFO] [stdout] 7 |     pub data: String,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout] 8 |     pub previous_hash: String,
[INFO] [stdout]   |         ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Block` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `index`, `timestamp`, `data`, and `previous_hash` are never read
[INFO] [stdout]  --> src/block.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Block {
[INFO] [stdout]   |            ----- fields in this struct
[INFO] [stdout] 5 |     pub index: u64,
[INFO] [stdout]   |         ^^^^^
[INFO] [stdout] 6 |     pub timestamp: DateTime<Utc>,
[INFO] [stdout]   |         ^^^^^^^^^
[INFO] [stdout] 7 |     pub data: String,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout] 8 |     pub previous_hash: String,
[INFO] [stdout]   |         ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Block` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.93s
[INFO] running `Command { std: "docker" "inspect" "f28fdbe8085645fdf11baf7a7b4f5f8d85c17ba842142c8f1636555a1b677631", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f28fdbe8085645fdf11baf7a7b4f5f8d85c17ba842142c8f1636555a1b677631", kill_on_drop: false }`
[INFO] [stdout] f28fdbe8085645fdf11baf7a7b4f5f8d85c17ba842142c8f1636555a1b677631