[INFO] cloning repository https://github.com/olegkich/simple-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/olegkich/simple-rust-blockchain" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Folegkich%2Fsimple-rust-blockchain", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Folegkich%2Fsimple-rust-blockchain'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a5b8f6388d9543ab7636ee341987318dd4bf3940
[INFO] building olegkich/simple-rust-blockchain against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Folegkich%2Fsimple-rust-blockchain" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/olegkich/simple-rust-blockchain on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/olegkich/simple-rust-blockchain
[INFO] finished tweaking git repo https://github.com/olegkich/simple-rust-blockchain
[INFO] tweaked toml for git repo https://github.com/olegkich/simple-rust-blockchain written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/olegkich/simple-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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tiny-gradient v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] da4ea7d238b03dda3ac5dba6fa2e574f66226c39ebcbd5e350626f53fd810a47
[INFO] running `Command { std: "docker" "start" "-a" "da4ea7d238b03dda3ac5dba6fa2e574f66226c39ebcbd5e350626f53fd810a47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "da4ea7d238b03dda3ac5dba6fa2e574f66226c39ebcbd5e350626f53fd810a47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "da4ea7d238b03dda3ac5dba6fa2e574f66226c39ebcbd5e350626f53fd810a47", kill_on_drop: false }`
[INFO] [stdout] da4ea7d238b03dda3ac5dba6fa2e574f66226c39ebcbd5e350626f53fd810a47
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f145dead1735cf29ee516916dee26a834e4b22983ad98fd2688042de098d299e
[INFO] running `Command { std: "docker" "start" "-a" "f145dead1735cf29ee516916dee26a834e4b22983ad98fd2688042de098d299e", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.15.0
[INFO] [stderr]    Compiling generic-array v0.14.6
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling libc v0.2.138
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling libm v0.2.6
[INFO] [stderr]    Compiling cpufeatures v0.2.5
[INFO] [stderr]    Compiling iana-time-zone v0.1.53
[INFO] [stderr]    Compiling tiny-gradient v0.1.0
[INFO] [stderr]    Compiling time v0.1.45
[INFO] [stderr]    Compiling chrono v0.4.23
[INFO] [stderr]    Compiling crypto-common v0.1.6
[INFO] [stderr]    Compiling block-buffer v0.10.3
[INFO] [stderr]    Compiling digest v0.10.6
[INFO] [stderr]    Compiling sha2 v0.10.6
[INFO] [stderr]    Compiling blockchain v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `ops::Index`
[INFO] [stdout]  --> src/main.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::{io, ops::Index};
[INFO] [stdout]   |               ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `previous_hash`, `data`, and `nonce` are never read
[INFO] [stdout]   --> src/blockchain.rs:9:3
[INFO] [stdout]    |
[INFO] [stdout] 6  | pub struct Block {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 9  |   previous_hash: String,
[INFO] [stdout]    |   ^^^^^^^^^^^^^
[INFO] [stdout] 10 |   data: String,
[INFO] [stdout]    |   ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 |   nonce: usize
[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: field `difficulty` is never read
[INFO] [stdout]   --> src/blockchain.rs:23:3
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct Chain {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 22 |   blocks: Vec<Block>,
[INFO] [stdout] 23 |   difficulty: usize
[INFO] [stdout]    |   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.95s
[INFO] running `Command { std: "docker" "inspect" "f145dead1735cf29ee516916dee26a834e4b22983ad98fd2688042de098d299e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f145dead1735cf29ee516916dee26a834e4b22983ad98fd2688042de098d299e", kill_on_drop: false }`
[INFO] [stdout] f145dead1735cf29ee516916dee26a834e4b22983ad98fd2688042de098d299e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 446ff02f982cac152ac14c8b9f4d8a7bd8c45b4beec637539b748085dd5f4d0c
[INFO] running `Command { std: "docker" "start" "-a" "446ff02f982cac152ac14c8b9f4d8a7bd8c45b4beec637539b748085dd5f4d0c", kill_on_drop: false }`
[INFO] [stderr]    Compiling blockchain v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `ops::Index`
[INFO] [stdout]  --> src/main.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::{io, ops::Index};
[INFO] [stdout]   |               ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `previous_hash`, `data`, and `nonce` are never read
[INFO] [stdout]   --> src/blockchain.rs:9:3
[INFO] [stdout]    |
[INFO] [stdout] 6  | pub struct Block {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 9  |   previous_hash: String,
[INFO] [stdout]    |   ^^^^^^^^^^^^^
[INFO] [stdout] 10 |   data: String,
[INFO] [stdout]    |   ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 |   nonce: usize
[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: field `difficulty` is never read
[INFO] [stdout]   --> src/blockchain.rs:23:3
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct Chain {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 22 |   blocks: Vec<Block>,
[INFO] [stdout] 23 |   difficulty: usize
[INFO] [stdout]    |   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "446ff02f982cac152ac14c8b9f4d8a7bd8c45b4beec637539b748085dd5f4d0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "446ff02f982cac152ac14c8b9f4d8a7bd8c45b4beec637539b748085dd5f4d0c", kill_on_drop: false }`
[INFO] [stdout] 446ff02f982cac152ac14c8b9f4d8a7bd8c45b4beec637539b748085dd5f4d0c