[INFO] fetching crate off_blockway 0.0.8...
[INFO] building off_blockway-0.0.8 against try#d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 for pr-146237-1
[INFO] extracting crate off_blockway 0.0.8 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate off_blockway 0.0.8
[INFO] finished tweaking crates.io crate off_blockway 0.0.8
[INFO] tweaked toml for crates.io crate off_blockway 0.0.8 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate off_blockway 0.0.8 on toolchain d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 47 packages to latest compatible versions
[INFO] [stderr]       Adding generic-array v0.9.1 (available: v1.2.0)
[INFO] [stderr]       Adding sha3 v0.6.0 (available: v0.10.8)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 78e5baee4985ecee7795da41edfc35b351c5a9738c44bfa6debcec13a8ea0f63
[INFO] running `Command { std: "docker" "start" "-a" "78e5baee4985ecee7795da41edfc35b351c5a9738c44bfa6debcec13a8ea0f63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "78e5baee4985ecee7795da41edfc35b351c5a9738c44bfa6debcec13a8ea0f63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78e5baee4985ecee7795da41edfc35b351c5a9738c44bfa6debcec13a8ea0f63", kill_on_drop: false }`
[INFO] [stdout] 78e5baee4985ecee7795da41edfc35b351c5a9738c44bfa6debcec13a8ea0f63
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 67d94d77a45abc9f3e2f3c59dc2c2e8b60e29fb664b7558f012142f42e6e820a
[INFO] running `Command { std: "docker" "start" "-a" "67d94d77a45abc9f3e2f3c59dc2c2e8b60e29fb664b7558f012142f42e6e820a", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling nodrop v0.1.14
[INFO] [stderr]    Compiling byte-tools v0.2.0
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling generic-array v0.9.1
[INFO] [stderr]    Compiling serde_json v1.0.145
[INFO] [stderr]    Compiling chrono v0.4.42
[INFO] [stderr]    Compiling generic-array v0.8.4
[INFO] [stderr]    Compiling digest v0.6.1
[INFO] [stderr]    Compiling block-buffer v0.2.0
[INFO] [stderr]    Compiling sha3 v0.6.0
[INFO] [stderr]    Compiling off_blockway v0.0.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/block.rs:140:13
[INFO] [stdout]     |
[INFO] [stdout] 140 |         Ok( ( json ) )
[INFO] [stdout]     |             ^^    ^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 140 -         Ok( ( json ) )
[INFO] [stdout] 140 +         Ok( json )
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/merkle.rs:516:13
[INFO] [stdout]     |
[INFO] [stdout] 516 |         Ok( ( json ) )
[INFO] [stdout]     |             ^^    ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 516 -         Ok( ( json ) )
[INFO] [stdout] 516 +         Ok( json )
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.17s
[INFO] running `Command { std: "docker" "inspect" "67d94d77a45abc9f3e2f3c59dc2c2e8b60e29fb664b7558f012142f42e6e820a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67d94d77a45abc9f3e2f3c59dc2c2e8b60e29fb664b7558f012142f42e6e820a", kill_on_drop: false }`
[INFO] [stdout] 67d94d77a45abc9f3e2f3c59dc2c2e8b60e29fb664b7558f012142f42e6e820a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 58d130358743eb41dba9f2e17c3447f449ae149a876c2cab2a4861ff3cca5006
[INFO] running `Command { std: "docker" "start" "-a" "58d130358743eb41dba9f2e17c3447f449ae149a876c2cab2a4861ff3cca5006", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/block.rs:140:13
[INFO] [stdout]     |
[INFO] [stdout] 140 |         Ok( ( json ) )
[INFO] [stdout]     |             ^^    ^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 140 -         Ok( ( json ) )
[INFO] [stdout] 140 +         Ok( json )
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/merkle.rs:516:13
[INFO] [stdout]     |
[INFO] [stdout] 516 |         Ok( ( json ) )
[INFO] [stdout]     |             ^^    ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 516 -         Ok( ( json ) )
[INFO] [stdout] 516 +         Ok( json )
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling off_blockway v0.0.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/block.rs:140:13
[INFO] [stdout]     |
[INFO] [stdout] 140 |         Ok( ( json ) )
[INFO] [stdout]     |             ^^    ^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 140 -         Ok( ( json ) )
[INFO] [stdout] 140 +         Ok( json )
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/merkle.rs:516:13
[INFO] [stdout]     |
[INFO] [stdout] 516 |         Ok( ( json ) )
[INFO] [stdout]     |             ^^    ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 516 -         Ok( ( json ) )
[INFO] [stdout] 516 +         Ok( json )
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left_value`
[INFO] [stdout]    --> src/lib.rs:122:13
[INFO] [stdout]     |
[INFO] [stdout] 122 |         let left_value: u8 = 0;
[INFO] [stdout]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_left_value`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right_value`
[INFO] [stdout]    --> src/lib.rs:123:13
[INFO] [stdout]     |
[INFO] [stdout] 123 |         let right_value: u8 = 1;
[INFO] [stdout]     |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_right_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `status`
[INFO] [stdout]    --> src/lib.rs:212:13
[INFO] [stdout]     |
[INFO] [stdout] 212 |         let status = Command::new( "rm" ).args( &[ "-rf", "testing-block.json" ]
[INFO] [stdout]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_status`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `json_block`
[INFO] [stdout]    --> src/lib.rs:219:13
[INFO] [stdout]     |
[INFO] [stdout] 219 |         let json_block = block::Block::read_and_construct( "testing-block.json" ).expect( "Did not convert json_block" );
[INFO] [stdout]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_json_block`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/lib.rs:374:13
[INFO] [stdout]     |
[INFO] [stdout] 374 |         for i in 0 .. 16 
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/lib.rs:423:13
[INFO] [stdout]     |
[INFO] [stdout] 423 |         for i in 0 .. 8 
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/lib.rs:444:13
[INFO] [stdout]     |
[INFO] [stdout] 444 |         for i in 0 .. 8
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/lib.rs:465:13
[INFO] [stdout]     |
[INFO] [stdout] 465 |         for i in 0 .. 8 
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/lib.rs:496:13
[INFO] [stdout]     |
[INFO] [stdout] 496 |         for i in 0 .. 8 
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/lib.rs:529:13
[INFO] [stdout]     |
[INFO] [stdout] 529 |         for i in 0 .. 8
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/lib.rs:100:13
[INFO] [stdout]     |
[INFO] [stdout] 100 |         let value: u8 = 9;
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/lib.rs:569:13
[INFO] [stdout]     |
[INFO] [stdout] 569 |         for i in 0 .. 8
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `status`
[INFO] [stdout]    --> src/lib.rs:677:13
[INFO] [stdout]     |
[INFO] [stdout] 677 |         let status = Command::new( "rm" ).args( &[ "-rf", "testing-merkle.json" ]
[INFO] [stdout]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_status`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `json_nodes`
[INFO] [stdout]    --> src/lib.rs:686:13
[INFO] [stdout]     |
[INFO] [stdout] 686 |         let json_nodes = merkle::Merkle::read_and_construct( "testing-merkle.json" ).expect("Did not convert to json_nodes");
[INFO] [stdout]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_json_nodes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `status`
[INFO] [stdout]    --> src/lib.rs:785:13
[INFO] [stdout]     |
[INFO] [stdout] 785 |         let status = Command::new( "rm" ).args( &[ "-rf", "testing-chain.json" ] ).status().expect( "Process failed ");
[INFO] [stdout]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_status`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d_chain`
[INFO] [stdout]    --> src/lib.rs:798:13
[INFO] [stdout]     |
[INFO] [stdout] 798 |         let d_chain = chain::Chain::read_and_construct( "testing-chain.json" ).expect("Did not convert to d_chain");
[INFO] [stdout]     |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_d_chain`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `status`
[INFO] [stdout]    --> src/lib.rs:909:13
[INFO] [stdout]     |
[INFO] [stdout] 909 |         let status = Command::new( "rm" ).args( &[ "testing-write.json" ] ).status().expect( "Filed to delete the json files" );
[INFO] [stdout]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_status`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:890:9
[INFO] [stdout]     |
[INFO] [stdout] 890 |         transaction.write_to( "testing-write.json" );
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 890 |         let _ = transaction.write_to( "testing-write.json" );
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:192:9
[INFO] [stdout]     |
[INFO] [stdout] 192 |         block.write_to( &file_name );
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 192 |         let _ = block.write_to( &file_name );
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:199:9
[INFO] [stdout]     |
[INFO] [stdout] 199 |         file.read_to_string( &mut json );
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 199 |         let _ = file.read_to_string( &mut json );
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:217:9
[INFO] [stdout]     |
[INFO] [stdout] 217 |         block.write_to( "testing-block.json" );
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 217 |         let _ = block.write_to( "testing-block.json" );
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:766:9
[INFO] [stdout]     |
[INFO] [stdout] 766 |         chain.write_to( "testing-chain.json" );
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 766 |         let _ = chain.write_to( "testing-chain.json" );
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:772:9
[INFO] [stdout]     |
[INFO] [stdout] 772 |         file.read_to_string( &mut string );
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 772 |         let _ = file.read_to_string( &mut string );
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:796:9
[INFO] [stdout]     |
[INFO] [stdout] 796 |         chain.write_to( "testing-chain.json" );
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 796 |         let _ = chain.write_to( "testing-chain.json" );
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:657:9
[INFO] [stdout]     |
[INFO] [stdout] 657 |         merkle.write_to( &file_name );
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 657 |         let _ = merkle.write_to( &file_name );
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:664:9
[INFO] [stdout]     |
[INFO] [stdout] 664 |         file.read_to_string( &mut json );
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 664 |         let _ = file.read_to_string( &mut json );
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:684:9
[INFO] [stdout]     |
[INFO] [stdout] 684 |         merkle.write_to( "testing-merkle.json" );
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 684 |         let _ = merkle.write_to( "testing-merkle.json" );
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:896:9
[INFO] [stdout]     |
[INFO] [stdout] 896 |         file.read_to_string( &mut info );
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 896 |         let _ = file.read_to_string( &mut info );
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:921:9
[INFO] [stdout]     |
[INFO] [stdout] 921 |         transaction.write_to( "testing-write.json" );
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 921 |         let _ = transaction.write_to( "testing-write.json" );
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.80s
[INFO] running `Command { std: "docker" "inspect" "58d130358743eb41dba9f2e17c3447f449ae149a876c2cab2a4861ff3cca5006", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58d130358743eb41dba9f2e17c3447f449ae149a876c2cab2a4861ff3cca5006", kill_on_drop: false }`
[INFO] [stdout] 58d130358743eb41dba9f2e17c3447f449ae149a876c2cab2a4861ff3cca5006
