[INFO] cloning repository https://github.com/mfcastellani/simple-blockchain
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mfcastellani/simple-blockchain" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmfcastellani%2Fsimple-blockchain", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmfcastellani%2Fsimple-blockchain'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a0310b7102988b0ea33ed40923778de30aaf39ef
[INFO] checking mfcastellani/simple-blockchain against try#2c4e58eac5a232e49065e517c1cf50b2715ccf85 for pr-140283
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmfcastellani%2Fsimple-blockchain" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mfcastellani/simple-blockchain
[INFO] finished tweaking git repo https://github.com/mfcastellani/simple-blockchain
[INFO] tweaked toml for git repo https://github.com/mfcastellani/simple-blockchain written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mfcastellani/simple-blockchain on toolchain 2c4e58eac5a232e49065e517c1cf50b2715ccf85
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2c4e58eac5a232e49065e517c1cf50b2715ccf85" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mfcastellani/simple-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" "+2c4e58eac5a232e49065e517c1cf50b2715ccf85" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded const-oid v0.10.0-rc.3
[INFO] [stderr]   Downloaded crypto-common v0.2.0-rc.1
[INFO] [stderr]   Downloaded hybrid-array v0.2.1
[INFO] [stderr]   Downloaded block-buffer v0.11.0-rc.3
[INFO] [stderr]   Downloaded sha2 v0.11.0-pre.4
[INFO] [stderr]   Downloaded digest v0.11.0-pre.9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+2c4e58eac5a232e49065e517c1cf50b2715ccf85" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1d22a0aebccfb400c6fba94dfd6d73e6be37a694a9385d486d3934c62619ea3b
[INFO] running `Command { std: "docker" "start" "-a" "1d22a0aebccfb400c6fba94dfd6d73e6be37a694a9385d486d3934c62619ea3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1d22a0aebccfb400c6fba94dfd6d73e6be37a694a9385d486d3934c62619ea3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d22a0aebccfb400c6fba94dfd6d73e6be37a694a9385d486d3934c62619ea3b", kill_on_drop: false }`
[INFO] [stdout] 1d22a0aebccfb400c6fba94dfd6d73e6be37a694a9385d486d3934c62619ea3b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+2c4e58eac5a232e49065e517c1cf50b2715ccf85" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 09dccce7f5482578cf00d3c3618acbca0eb05cabf5fda7b0d7d152531c88d168
[INFO] running `Command { std: "docker" "start" "-a" "09dccce7f5482578cf00d3c3618acbca0eb05cabf5fda7b0d7d152531c88d168", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.17.0
[INFO] [stderr]     Checking const-oid v0.10.0-rc.3
[INFO] [stderr]     Checking cpufeatures v0.2.14
[INFO] [stderr]     Checking hybrid-array v0.2.1
[INFO] [stderr]     Checking crypto-common v0.2.0-rc.1
[INFO] [stderr]     Checking block-buffer v0.11.0-rc.3
[INFO] [stderr]     Checking digest v0.11.0-pre.9
[INFO] [stderr]     Checking sha2 v0.11.0-pre.4
[INFO] [stderr]     Checking simple-blockchain v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `origin`, `destination`, and `quantity` are never read
[INFO] [stdout]   --> src/main.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout]  6 | struct Transaction {
[INFO] [stdout]    |        ----------- fields in this struct
[INFO] [stdout]  7 |     id: u64,
[INFO] [stdout]  8 |     origin: String,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]  9 |     destination: String,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 10 |     quantity: u64,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Transaction` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_chain_validation` is never used
[INFO] [stdout]    --> src/main.rs:203:8
[INFO] [stdout]     |
[INFO] [stdout] 203 |     fn test_chain_validation() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id`, `origin`, `destination`, and `quantity` are never read
[INFO] [stdout]   --> src/main.rs:7:5
[INFO] [stdout]    |
[INFO] [stdout]  6 | struct Transaction {
[INFO] [stdout]    |        ----------- fields in this struct
[INFO] [stdout]  7 |     id: u64,
[INFO] [stdout]    |     ^^
[INFO] [stdout]  8 |     origin: String,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]  9 |     destination: String,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 10 |     quantity: u64,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Transaction` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_block_by_id` is never used
[INFO] [stdout]   --> src/main.rs:88:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | impl Blockchain {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 88 |     fn get_block_by_id(&self, id: u64) -> Option<&Block> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.71s
[INFO] running `Command { std: "docker" "inspect" "09dccce7f5482578cf00d3c3618acbca0eb05cabf5fda7b0d7d152531c88d168", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09dccce7f5482578cf00d3c3618acbca0eb05cabf5fda7b0d7d152531c88d168", kill_on_drop: false }`
[INFO] [stdout] 09dccce7f5482578cf00d3c3618acbca0eb05cabf5fda7b0d7d152531c88d168