[INFO] cloning repository https://github.com/jk-gan/blockchain-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jk-gan/blockchain-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjk-gan%2Fblockchain-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjk-gan%2Fblockchain-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9ae8ac66358ffabd7bfc2a42fab1b966b4a61131
[INFO] building jk-gan/blockchain-rust against master#ce36a966c79e109dabeef7a47fe68e5294c6d71e for pr-137044-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjk-gan%2Fblockchain-rust" "/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/jk-gan/blockchain-rust on toolchain ce36a966c79e109dabeef7a47fe68e5294c6d71e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ce36a966c79e109dabeef7a47fe68e5294c6d71e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jk-gan/blockchain-rust
[INFO] finished tweaking git repo https://github.com/jk-gan/blockchain-rust
[INFO] tweaked toml for git repo https://github.com/jk-gan/blockchain-rust written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/jk-gan/blockchain-rust 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" "+ce36a966c79e109dabeef7a47fe68e5294c6d71e" "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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded lazy_static v1.2.0
[INFO] [stderr]   Downloaded untrusted v0.6.2
[INFO] [stderr]   Downloaded num-integer v0.1.39
[INFO] [stderr]   Downloaded redox_syscall v0.1.42
[INFO] [stderr]   Downloaded num-complex v0.2.1
[INFO] [stderr]   Downloaded time v0.1.40
[INFO] [stderr]   Downloaded cc v1.0.25
[INFO] [stderr]   Downloaded num-iter v0.1.37
[INFO] [stderr]   Downloaded num-traits v0.2.6
[INFO] [stderr]   Downloaded num-rational v0.2.1
[INFO] [stderr]   Downloaded chrono v0.4.6
[INFO] [stderr]   Downloaded num v0.2.0
[INFO] [stderr]   Downloaded libc v0.2.44
[INFO] [stderr]   Downloaded num-bigint v0.2.1
[INFO] [stderr]   Downloaded winapi v0.3.6
[INFO] [stderr]   Downloaded ring v0.13.5
[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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+ce36a966c79e109dabeef7a47fe68e5294c6d71e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c375f0a06c3b0dcd1b3d44f4f4510253f4270cdea8126c9beec783be6699fa79
[INFO] running `Command { std: "docker" "start" "-a" "c375f0a06c3b0dcd1b3d44f4f4510253f4270cdea8126c9beec783be6699fa79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c375f0a06c3b0dcd1b3d44f4f4510253f4270cdea8126c9beec783be6699fa79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c375f0a06c3b0dcd1b3d44f4f4510253f4270cdea8126c9beec783be6699fa79", kill_on_drop: false }`
[INFO] [stdout] c375f0a06c3b0dcd1b3d44f4f4510253f4270cdea8126c9beec783be6699fa79
[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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+ce36a966c79e109dabeef7a47fe68e5294c6d71e" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dc9e4b1f6964c18c8e705ca6fafe33a2d6c40a7c526f4d8f099e49be011d4b2c
[INFO] running `Command { std: "docker" "start" "-a" "dc9e4b1f6964c18c8e705ca6fafe33a2d6c40a7c526f4d8f099e49be011d4b2c", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling libc v0.2.44
[INFO] [stderr]    Compiling num-bigint v0.2.1
[INFO] [stderr]    Compiling num-complex v0.2.1
[INFO] [stderr]    Compiling cc v1.0.25
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling num-rational v0.2.1
[INFO] [stderr]    Compiling lazy_static v1.2.0
[INFO] [stderr]    Compiling untrusted v0.6.2
[INFO] [stderr]    Compiling ring v0.13.5
[INFO] [stderr]    Compiling time v0.1.40
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling num v0.2.0
[INFO] [stderr]    Compiling blockchain v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: constant `TARGER_BIT` is never used
[INFO] [stdout]  --> src/proof_of_work.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | const TARGER_BIT: usize = 24;
[INFO] [stdout]   |       ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ProofOfWork` is never constructed
[INFO] [stdout]  --> src/proof_of_work.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct ProofOfWork {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/proof_of_work.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl ProofOfWork {
[INFO] [stdout]    | ---------------- associated function in this implementation
[INFO] [stdout] 13 |     fn new(block: Block) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.81s
[INFO] running `Command { std: "docker" "inspect" "dc9e4b1f6964c18c8e705ca6fafe33a2d6c40a7c526f4d8f099e49be011d4b2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc9e4b1f6964c18c8e705ca6fafe33a2d6c40a7c526f4d8f099e49be011d4b2c", kill_on_drop: false }`
[INFO] [stdout] dc9e4b1f6964c18c8e705ca6fafe33a2d6c40a7c526f4d8f099e49be011d4b2c
[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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+ce36a966c79e109dabeef7a47fe68e5294c6d71e" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e78544cf01542052fcc40b39acb56c3bff0308f976c3ea9fea69bd002edfe19c
[INFO] running `Command { std: "docker" "start" "-a" "e78544cf01542052fcc40b39acb56c3bff0308f976c3ea9fea69bd002edfe19c", kill_on_drop: false }`
[INFO] [stderr]    Compiling blockchain v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: constant `TARGER_BIT` is never used
[INFO] [stdout]  --> src/proof_of_work.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | const TARGER_BIT: usize = 24;
[INFO] [stdout]   |       ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ProofOfWork` is never constructed
[INFO] [stdout]  --> src/proof_of_work.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct ProofOfWork {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/proof_of_work.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl ProofOfWork {
[INFO] [stdout]    | ---------------- associated function in this implementation
[INFO] [stdout] 13 |     fn new(block: Block) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "e78544cf01542052fcc40b39acb56c3bff0308f976c3ea9fea69bd002edfe19c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e78544cf01542052fcc40b39acb56c3bff0308f976c3ea9fea69bd002edfe19c", kill_on_drop: false }`
[INFO] [stdout] e78544cf01542052fcc40b39acb56c3bff0308f976c3ea9fea69bd002edfe19c