[INFO] crate off_blockway 0.0.8 is already in cache
[INFO] checking off_blockway-0.0.8 against master#209b2be09fcaff937480d1fbbe8b31646e361c7a for pr-70917
[INFO] extracting crate off_blockway 0.0.8 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate off_blockway 0.0.8 on toolchain 209b2be09fcaff937480d1fbbe8b31646e361c7a
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-2/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ea9cf6c976dd3584c7acf59faf7a1b7e9373817a41ea82a229d808e6c70dc117
[INFO] running `"docker" "start" "-a" "ea9cf6c976dd3584c7acf59faf7a1b7e9373817a41ea82a229d808e6c70dc117"`
[INFO] [stderr]     Checking sha3 v0.6.0
[INFO] [stderr]     Checking off_blockway v0.0.8 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/block.rs:140:13
[INFO] [stderr]     |
[INFO] [stderr] 140 |         Ok( ( json ) )
[INFO] [stderr]     |             ^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/merkle.rs:516:13
[INFO] [stderr]     |
[INFO] [stderr] 516 |         Ok( ( json ) )
[INFO] [stderr]     |             ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/block.rs:140:13
[INFO] [stderr]     |
[INFO] [stderr] 140 |         Ok( ( json ) )
[INFO] [stderr]     |             ^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/merkle.rs:516:13
[INFO] [stderr]     |
[INFO] [stderr] 516 |         Ok( ( json ) )
[INFO] [stderr]     |             ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]    --> src/lib.rs:100:13
[INFO] [stderr]     |
[INFO] [stderr] 100 |         let value: u8 = 9;
[INFO] [stderr]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `left_value`
[INFO] [stderr]    --> src/lib.rs:122:13
[INFO] [stderr]     |
[INFO] [stderr] 122 |         let left_value: u8 = 0;
[INFO] [stderr]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_left_value`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `right_value`
[INFO] [stderr]    --> src/lib.rs:123:13
[INFO] [stderr]     |
[INFO] [stderr] 123 |         let right_value: u8 = 1;
[INFO] [stderr]     |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_right_value`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `status`
[INFO] [stderr]    --> src/lib.rs:212:13
[INFO] [stderr]     |
[INFO] [stderr] 212 |         let status = Command::new( "rm" ).args( &[ "-rf", "testing-block.json" ]
[INFO] [stderr]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_status`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `json_block`
[INFO] [stderr]    --> src/lib.rs:219:13
[INFO] [stderr]     |
[INFO] [stderr] 219 |         let json_block = block::Block::read_and_construct( "testing-block.json" ).expect( "Did not convert json_block" );
[INFO] [stderr]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_json_block`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/lib.rs:374:13
[INFO] [stderr]     |
[INFO] [stderr] 374 |         for i in 0 .. 16 
[INFO] [stderr]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/lib.rs:423:13
[INFO] [stderr]     |
[INFO] [stderr] 423 |         for i in 0 .. 8 
[INFO] [stderr]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/lib.rs:444:13
[INFO] [stderr]     |
[INFO] [stderr] 444 |         for i in 0 .. 8
[INFO] [stderr]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/lib.rs:465:13
[INFO] [stderr]     |
[INFO] [stderr] 465 |         for i in 0 .. 8 
[INFO] [stderr]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/lib.rs:496:13
[INFO] [stderr]     |
[INFO] [stderr] 496 |         for i in 0 .. 8 
[INFO] [stderr]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/lib.rs:529:13
[INFO] [stderr]     |
[INFO] [stderr] 529 |         for i in 0 .. 8
[INFO] [stderr]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/lib.rs:569:13
[INFO] [stderr]     |
[INFO] [stderr] 569 |         for i in 0 .. 8
[INFO] [stderr]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `status`
[INFO] [stderr]    --> src/lib.rs:677:13
[INFO] [stderr]     |
[INFO] [stderr] 677 |         let status = Command::new( "rm" ).args( &[ "-rf", "testing-merkle.json" ]
[INFO] [stderr]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_status`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `json_nodes`
[INFO] [stderr]    --> src/lib.rs:686:13
[INFO] [stderr]     |
[INFO] [stderr] 686 |         let json_nodes = merkle::Merkle::read_and_construct( "testing-merkle.json" ).expect("Did not convert to json_nodes");
[INFO] [stderr]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_json_nodes`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `status`
[INFO] [stderr]    --> src/lib.rs:785:13
[INFO] [stderr]     |
[INFO] [stderr] 785 |         let status = Command::new( "rm" ).args( &[ "-rf", "testing-chain.json" ] ).status().expect( "Process failed ");
[INFO] [stderr]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_status`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d_chain`
[INFO] [stderr]    --> src/lib.rs:798:13
[INFO] [stderr]     |
[INFO] [stderr] 798 |         let d_chain = chain::Chain::read_and_construct( "testing-chain.json" ).expect("Did not convert to d_chain");
[INFO] [stderr]     |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_d_chain`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `status`
[INFO] [stderr]    --> src/lib.rs:909:13
[INFO] [stderr]     |
[INFO] [stderr] 909 |         let status = Command::new( "rm" ).args( &[ "testing-write.json" ] ).status().expect( "Filed to delete the json files" );
[INFO] [stderr]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_status`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:192:9
[INFO] [stderr]     |
[INFO] [stderr] 192 |         block.write_to( &file_name );
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:199:9
[INFO] [stderr]     |
[INFO] [stderr] 199 |         file.read_to_string( &mut json );
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:217:9
[INFO] [stderr]     |
[INFO] [stderr] 217 |         block.write_to( "testing-block.json" );
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:657:9
[INFO] [stderr]     |
[INFO] [stderr] 657 |         merkle.write_to( &file_name );
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:664:9
[INFO] [stderr]     |
[INFO] [stderr] 664 |         file.read_to_string( &mut json );
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:684:9
[INFO] [stderr]     |
[INFO] [stderr] 684 |         merkle.write_to( "testing-merkle.json" );
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:766:9
[INFO] [stderr]     |
[INFO] [stderr] 766 |         chain.write_to( "testing-chain.json" );
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:772:9
[INFO] [stderr]     |
[INFO] [stderr] 772 |         file.read_to_string( &mut string );
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:796:9
[INFO] [stderr]     |
[INFO] [stderr] 796 |         chain.write_to( "testing-chain.json" );
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:890:9
[INFO] [stderr]     |
[INFO] [stderr] 890 |         transaction.write_to( "testing-write.json" );
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:896:9
[INFO] [stderr]     |
[INFO] [stderr] 896 |         file.read_to_string( &mut info );
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:921:9
[INFO] [stderr]     |
[INFO] [stderr] 921 |         transaction.write_to( "testing-write.json" );
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.56s
[INFO] running `"docker" "inspect" "ea9cf6c976dd3584c7acf59faf7a1b7e9373817a41ea82a229d808e6c70dc117"`
[INFO] running `"docker" "rm" "-f" "ea9cf6c976dd3584c7acf59faf7a1b7e9373817a41ea82a229d808e6c70dc117"`
[INFO] [stdout] ea9cf6c976dd3584c7acf59faf7a1b7e9373817a41ea82a229d808e6c70dc117
