Dec 05 07:56:12.088 INFO testing sergorl/merkle_hash_tree against master#906deae0790bd18681b937fe9a141a3c26cf1855 for pr-56514
Dec 05 07:56:12.088 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-2/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +906deae0790bd18681b937fe9a141a3c26cf1855-alt build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 05 07:56:12.412 INFO [stdout] f0a0d9303f9ab7912e7ac1aa85dd76533727ce403aae81151ff78318979427c7
Dec 05 07:56:12.416 INFO running `"docker" "start" "-a" "f0a0d9303f9ab7912e7ac1aa85dd76533727ce403aae81151ff78318979427c7"`
Dec 05 07:56:13.476 INFO [stderr] usermod: no changes
Dec 05 07:56:13.595 INFO [stderr]    Compiling either v1.4.0
Dec 05 07:56:13.595 INFO [stderr]    Compiling num_cpus v0.2.13
Dec 05 07:56:13.600 INFO [stderr]    Compiling rust-crypto v0.2.36
Dec 05 07:56:14.217 INFO [stderr]    Compiling coco v0.1.1
Dec 05 07:56:15.560 INFO [stderr]    Compiling rayon-core v1.3.0
Dec 05 07:56:18.195 INFO [stderr]    Compiling rayon v0.9.0
Dec 05 07:56:26.664 INFO [stderr]    Compiling merkle_hash_tree v0.1.0 (/source)
Dec 05 07:56:27.088 INFO [stderr] warning: unused variable: `num_thread`
Dec 05 07:56:27.088 INFO [stderr]    --> src/lib.rs:272:13
Dec 05 07:56:27.088 INFO [stderr]     |
Dec 05 07:56:27.088 INFO [stderr] 272 |         let num_thread: usize;
Dec 05 07:56:27.088 INFO [stderr]     |             ^^^^^^^^^^ help: consider using `_num_thread` instead
Dec 05 07:56:27.088 INFO [stderr]     |
Dec 05 07:56:27.088 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 05 07:56:27.088 INFO [stderr] 
Dec 05 07:56:27.088 INFO [stderr] warning: unused variable: `num_cpus`
Dec 05 07:56:27.088 INFO [stderr]    --> src/lib.rs:255:78
Dec 05 07:56:27.088 INFO [stderr]     |
Dec 05 07:56:27.088 INFO [stderr] 255 | fn create_hash_level(hash_tree: &mut Vec<Vec<u8>>, pool: &rayon::ThreadPool, num_cpus: usize) {
Dec 05 07:56:27.088 INFO [stderr]     |                                                                              ^^^^^^^^ help: consider using `_num_cpus` instead
Dec 05 07:56:27.088 INFO [stderr] 
Dec 05 07:56:27.088 INFO [stderr] warning: unused variable: `num_cpus`
Dec 05 07:56:27.088 INFO [stderr]    --> src/lib.rs:305:5
Dec 05 07:56:27.088 INFO [stderr]     |
Dec 05 07:56:27.089 INFO [stderr] 305 |     num_cpus: usize,
Dec 05 07:56:27.089 INFO [stderr]     |     ^^^^^^^^ help: consider using `_num_cpus` instead
Dec 05 07:56:27.089 INFO [stderr] 
Dec 05 07:56:27.132 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 07:56:27.132 INFO [stderr]    --> src/lib.rs:158:9
Dec 05 07:56:27.132 INFO [stderr]     |
Dec 05 07:56:27.132 INFO [stderr] 158 |         write!(f, "{}\n", "Tree: ");
Dec 05 07:56:27.132 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:56:27.132 INFO [stderr]     |
Dec 05 07:56:27.132 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 05 07:56:27.132 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 07:56:27.132 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 07:56:27.132 INFO [stderr] 
Dec 05 07:56:27.132 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 07:56:27.132 INFO [stderr]    --> src/lib.rs:161:13
Dec 05 07:56:27.132 INFO [stderr]     |
Dec 05 07:56:27.132 INFO [stderr] 161 |             write!(f, "Level {}: \n", level);
Dec 05 07:56:27.132 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:56:27.132 INFO [stderr]     |
Dec 05 07:56:27.132 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 07:56:27.132 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 07:56:27.132 INFO [stderr] 
Dec 05 07:56:27.133 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 07:56:27.133 INFO [stderr]    --> src/lib.rs:164:17
Dec 05 07:56:27.133 INFO [stderr]     |
Dec 05 07:56:27.133 INFO [stderr] 164 |                 write!(f, "hash {}: {}\n", index, to_hex_string(hash));
Dec 05 07:56:27.133 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:56:27.133 INFO [stderr]     |
Dec 05 07:56:27.133 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 07:56:27.133 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 07:56:27.133 INFO [stderr] 
Dec 05 07:56:27.133 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 07:56:27.133 INFO [stderr]    --> src/lib.rs:170:13
Dec 05 07:56:27.133 INFO [stderr]     |
Dec 05 07:56:27.133 INFO [stderr] 170 | /             write!(
Dec 05 07:56:27.133 INFO [stderr] 171 | |                 f,
Dec 05 07:56:27.133 INFO [stderr] 172 | |                 "{}\n",
Dec 05 07:56:27.133 INFO [stderr] 173 | |                 "--------------------------------------------------------------------"
Dec 05 07:56:27.133 INFO [stderr] 174 | |             );
Dec 05 07:56:27.133 INFO [stderr]     | |______________^
Dec 05 07:56:27.133 INFO [stderr]     |
Dec 05 07:56:27.133 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 07:56:27.133 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 07:56:27.133 INFO [stderr] 
Dec 05 07:56:28.388 INFO [stderr] warning: unused import: `merkle_tree::to_hex_string`
Dec 05 07:56:28.388 INFO [stderr]  --> src/main.rs:6:5
Dec 05 07:56:28.388 INFO [stderr]   |
Dec 05 07:56:28.388 INFO [stderr] 6 | use merkle_tree::to_hex_string;
Dec 05 07:56:28.388 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:56:28.388 INFO [stderr]   |
Dec 05 07:56:28.388 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 05 07:56:28.388 INFO [stderr] 
Dec 05 07:56:28.405 INFO [stderr] warning: unused variable: `start`
Dec 05 07:56:28.408 INFO [stderr]   --> src/main.rs:23:9
Dec 05 07:56:28.408 INFO [stderr]    |
Dec 05 07:56:28.408 INFO [stderr] 23 |     let start = PreciseTime::now();
Dec 05 07:56:28.408 INFO [stderr]    |         ^^^^^ help: consider using `_start` instead
Dec 05 07:56:28.408 INFO [stderr]    |
Dec 05 07:56:28.408 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 05 07:56:28.408 INFO [stderr] 
Dec 05 07:56:28.408 INFO [stderr] warning: unused variable: `end`
Dec 05 07:56:28.408 INFO [stderr]   --> src/main.rs:25:9
Dec 05 07:56:28.408 INFO [stderr]    |
Dec 05 07:56:28.408 INFO [stderr] 25 |     let end = PreciseTime::now();
Dec 05 07:56:28.408 INFO [stderr]    |         ^^^ help: consider using `_end` instead
Dec 05 07:56:28.408 INFO [stderr] 
Dec 05 07:56:28.408 INFO [stderr] warning: variable does not need to be mutable
Dec 05 07:56:28.408 INFO [stderr]   --> src/main.rs:18:9
Dec 05 07:56:28.408 INFO [stderr]    |
Dec 05 07:56:28.408 INFO [stderr] 18 |     let mut num_block: usize = 8 * 2;
Dec 05 07:56:28.408 INFO [stderr]    |         ----^^^^^^^^^
Dec 05 07:56:28.408 INFO [stderr]    |         |
Dec 05 07:56:28.408 INFO [stderr]    |         help: remove this `mut`
Dec 05 07:56:28.408 INFO [stderr]    |
Dec 05 07:56:28.408 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 05 07:56:28.408 INFO [stderr] 
Dec 05 07:56:28.408 INFO [stderr] warning: variable does not need to be mutable
Dec 05 07:56:28.408 INFO [stderr]   --> src/main.rs:19:9
Dec 05 07:56:28.408 INFO [stderr]    |
Dec 05 07:56:28.409 INFO [stderr] 19 |     let mut size_block: usize = 32;
Dec 05 07:56:28.409 INFO [stderr]    |         ----^^^^^^^^^^
Dec 05 07:56:28.409 INFO [stderr]    |         |
Dec 05 07:56:28.409 INFO [stderr]    |         help: remove this `mut`
Dec 05 07:56:28.409 INFO [stderr] 
Dec 05 07:56:29.376 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.87s
Dec 05 07:56:29.376 INFO [stderr] su: No module specific data is present
Dec 05 07:56:30.162 INFO running `"docker" "inspect" "f0a0d9303f9ab7912e7ac1aa85dd76533727ce403aae81151ff78318979427c7"`
Dec 05 07:56:30.476 INFO running `"docker" "rm" "-f" "f0a0d9303f9ab7912e7ac1aa85dd76533727ce403aae81151ff78318979427c7"`
Dec 05 07:56:30.788 INFO [stdout] f0a0d9303f9ab7912e7ac1aa85dd76533727ce403aae81151ff78318979427c7
Dec 05 07:56:30.790 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-2/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +906deae0790bd18681b937fe9a141a3c26cf1855-alt test --frozen --no-run" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 05 07:56:31.342 INFO [stdout] cdd84db1886f08d4a9d4f0523359c68793f48a2316ffe58c4af1c4ea21e621dd
Dec 05 07:56:31.344 INFO running `"docker" "start" "-a" "cdd84db1886f08d4a9d4f0523359c68793f48a2316ffe58c4af1c4ea21e621dd"`
Dec 05 07:56:32.795 INFO [stderr] usermod: no changes
Dec 05 07:56:32.948 INFO [stderr]    Compiling merkle_hash_tree v0.1.0 (/source)
Dec 05 07:56:33.696 INFO [stderr] warning: unused import: `crypto::digest::Digest`
Dec 05 07:56:33.696 INFO [stderr]   --> tests/test.rs:10:5
Dec 05 07:56:33.696 INFO [stderr]    |
Dec 05 07:56:33.696 INFO [stderr] 10 | use crypto::digest::Digest;
Dec 05 07:56:33.696 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:56:33.696 INFO [stderr]    |
Dec 05 07:56:33.696 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 05 07:56:33.696 INFO [stderr] 
Dec 05 07:56:33.696 INFO [stderr] warning: unused import: `rand::Rng`
Dec 05 07:56:33.696 INFO [stderr]   --> tests/test.rs:12:5
Dec 05 07:56:33.696 INFO [stderr]    |
Dec 05 07:56:33.696 INFO [stderr] 12 | use rand::Rng;
Dec 05 07:56:33.696 INFO [stderr]    |     ^^^^^^^^^
Dec 05 07:56:33.696 INFO [stderr] 
Dec 05 07:56:34.212 INFO [stderr] warning: unused variable: `tree`
Dec 05 07:56:34.212 INFO [stderr]   --> tests/test.rs:66:13
Dec 05 07:56:34.212 INFO [stderr]    |
Dec 05 07:56:34.212 INFO [stderr] 66 |         let tree = MerkleTree::new(&data, num_cpus::get());
Dec 05 07:56:34.212 INFO [stderr]    |             ^^^^ help: consider using `_tree` instead
Dec 05 07:56:34.212 INFO [stderr]    |
Dec 05 07:56:34.212 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 05 07:56:34.212 INFO [stderr] 
Dec 05 07:56:34.212 INFO [stderr] warning: unused variable: `tree`
Dec 05 07:56:34.212 INFO [stderr]   --> tests/test.rs:74:13
Dec 05 07:56:34.212 INFO [stderr]    |
Dec 05 07:56:34.212 INFO [stderr] 74 |         let tree = MerkleTree::new(&data, num_cpus::get());
Dec 05 07:56:34.212 INFO [stderr]    |             ^^^^ help: consider using `_tree` instead
Dec 05 07:56:34.212 INFO [stderr] 
Dec 05 07:56:34.212 INFO [stderr] warning: unused variable: `tree`
Dec 05 07:56:34.212 INFO [stderr]   --> tests/test.rs:82:13
Dec 05 07:56:34.212 INFO [stderr]    |
Dec 05 07:56:34.212 INFO [stderr] 82 |         let tree = MerkleTree::new(&data, num_cpus::get());
Dec 05 07:56:34.212 INFO [stderr]    |             ^^^^ help: consider using `_tree` instead
Dec 05 07:56:34.212 INFO [stderr] 
Dec 05 07:56:34.330 INFO [stderr] warning: unused import: `merkle_tree::to_hex_string`
Dec 05 07:56:34.330 INFO [stderr]  --> src/main.rs:6:5
Dec 05 07:56:34.330 INFO [stderr]   |
Dec 05 07:56:34.330 INFO [stderr] 6 | use merkle_tree::to_hex_string;
Dec 05 07:56:34.330 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:56:34.330 INFO [stderr]   |
Dec 05 07:56:34.330 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 05 07:56:34.330 INFO [stderr] 
Dec 05 07:56:34.468 INFO [stderr] warning: unused variable: `start`
Dec 05 07:56:34.468 INFO [stderr]   --> src/main.rs:23:9
Dec 05 07:56:34.468 INFO [stderr]    |
Dec 05 07:56:34.468 INFO [stderr] 23 |     let start = PreciseTime::now();
Dec 05 07:56:34.468 INFO [stderr]    |         ^^^^^ help: consider using `_start` instead
Dec 05 07:56:34.484 INFO [stderr]    |
Dec 05 07:56:34.484 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 05 07:56:34.484 INFO [stderr] 
Dec 05 07:56:34.484 INFO [stderr] warning: unused variable: `end`
Dec 05 07:56:34.484 INFO [stderr]   --> src/main.rs:25:9
Dec 05 07:56:34.484 INFO [stderr]    |
Dec 05 07:56:34.484 INFO [stderr] 25 |     let end = PreciseTime::now();
Dec 05 07:56:34.484 INFO [stderr]    |         ^^^ help: consider using `_end` instead
Dec 05 07:56:34.484 INFO [stderr] 
Dec 05 07:56:34.484 INFO [stderr] warning: variable does not need to be mutable
Dec 05 07:56:34.484 INFO [stderr]   --> src/main.rs:18:9
Dec 05 07:56:34.484 INFO [stderr]    |
Dec 05 07:56:34.484 INFO [stderr] 18 |     let mut num_block: usize = 8 * 2;
Dec 05 07:56:34.484 INFO [stderr]    |         ----^^^^^^^^^
Dec 05 07:56:34.484 INFO [stderr]    |         |
Dec 05 07:56:34.484 INFO [stderr]    |         help: remove this `mut`
Dec 05 07:56:34.484 INFO [stderr]    |
Dec 05 07:56:34.484 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 05 07:56:34.484 INFO [stderr] 
Dec 05 07:56:34.484 INFO [stderr] warning: variable does not need to be mutable
Dec 05 07:56:34.484 INFO [stderr]   --> src/main.rs:19:9
Dec 05 07:56:34.484 INFO [stderr]    |
Dec 05 07:56:34.484 INFO [stderr] 19 |     let mut size_block: usize = 32;
Dec 05 07:56:34.484 INFO [stderr]    |         ----^^^^^^^^^^
Dec 05 07:56:34.484 INFO [stderr]    |         |
Dec 05 07:56:34.484 INFO [stderr]    |         help: remove this `mut`
Dec 05 07:56:34.484 INFO [stderr] 
Dec 05 07:56:34.556 INFO [stderr] warning: unused variable: `num_thread`
Dec 05 07:56:34.556 INFO [stderr]    --> src/lib.rs:272:13
Dec 05 07:56:34.556 INFO [stderr]     |
Dec 05 07:56:34.556 INFO [stderr] 272 |         let num_thread: usize;
Dec 05 07:56:34.556 INFO [stderr]     |             ^^^^^^^^^^ help: consider using `_num_thread` instead
Dec 05 07:56:34.556 INFO [stderr]     |
Dec 05 07:56:34.556 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 05 07:56:34.556 INFO [stderr] 
Dec 05 07:56:34.556 INFO [stderr] warning: unused variable: `num_cpus`
Dec 05 07:56:34.556 INFO [stderr]    --> src/lib.rs:255:78
Dec 05 07:56:34.556 INFO [stderr]     |
Dec 05 07:56:34.556 INFO [stderr] 255 | fn create_hash_level(hash_tree: &mut Vec<Vec<u8>>, pool: &rayon::ThreadPool, num_cpus: usize) {
Dec 05 07:56:34.556 INFO [stderr]     |                                                                              ^^^^^^^^ help: consider using `_num_cpus` instead
Dec 05 07:56:34.556 INFO [stderr] 
Dec 05 07:56:34.556 INFO [stderr] warning: unused variable: `num_cpus`
Dec 05 07:56:34.556 INFO [stderr]    --> src/lib.rs:305:5
Dec 05 07:56:34.556 INFO [stderr]     |
Dec 05 07:56:34.556 INFO [stderr] 305 |     num_cpus: usize,
Dec 05 07:56:34.556 INFO [stderr]     |     ^^^^^^^^ help: consider using `_num_cpus` instead
Dec 05 07:56:34.556 INFO [stderr] 
Dec 05 07:56:34.647 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 07:56:34.647 INFO [stderr]    --> src/lib.rs:158:9
Dec 05 07:56:34.647 INFO [stderr]     |
Dec 05 07:56:34.647 INFO [stderr] 158 |         write!(f, "{}\n", "Tree: ");
Dec 05 07:56:34.647 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:56:34.650 INFO [stderr]     |
Dec 05 07:56:34.650 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 05 07:56:34.650 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 07:56:34.650 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 07:56:34.650 INFO [stderr] 
Dec 05 07:56:34.650 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 07:56:34.650 INFO [stderr]    --> src/lib.rs:161:13
Dec 05 07:56:34.650 INFO [stderr]     |
Dec 05 07:56:34.650 INFO [stderr] 161 |             write!(f, "Level {}: \n", level);
Dec 05 07:56:34.650 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:56:34.650 INFO [stderr]     |
Dec 05 07:56:34.650 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 07:56:34.650 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 07:56:34.650 INFO [stderr] 
Dec 05 07:56:34.650 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 07:56:34.650 INFO [stderr]    --> src/lib.rs:164:17
Dec 05 07:56:34.650 INFO [stderr]     |
Dec 05 07:56:34.650 INFO [stderr] 164 |                 write!(f, "hash {}: {}\n", index, to_hex_string(hash));
Dec 05 07:56:34.650 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:56:34.650 INFO [stderr]     |
Dec 05 07:56:34.650 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 07:56:34.650 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 07:56:34.650 INFO [stderr] 
Dec 05 07:56:34.650 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 07:56:34.650 INFO [stderr]    --> src/lib.rs:170:13
Dec 05 07:56:34.650 INFO [stderr]     |
Dec 05 07:56:34.650 INFO [stderr] 170 | /             write!(
Dec 05 07:56:34.650 INFO [stderr] 171 | |                 f,
Dec 05 07:56:34.650 INFO [stderr] 172 | |                 "{}\n",
Dec 05 07:56:34.650 INFO [stderr] 173 | |                 "--------------------------------------------------------------------"
Dec 05 07:56:34.650 INFO [stderr] 174 | |             );
Dec 05 07:56:34.650 INFO [stderr]     | |______________^
Dec 05 07:56:34.650 INFO [stderr]     |
Dec 05 07:56:34.650 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 07:56:34.650 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 07:56:34.650 INFO [stderr] 
Dec 05 07:56:36.028 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.18s
Dec 05 07:56:36.032 INFO [stderr] su: No module specific data is present
Dec 05 07:56:36.798 INFO running `"docker" "inspect" "cdd84db1886f08d4a9d4f0523359c68793f48a2316ffe58c4af1c4ea21e621dd"`
Dec 05 07:56:37.072 INFO running `"docker" "rm" "-f" "cdd84db1886f08d4a9d4f0523359c68793f48a2316ffe58c4af1c4ea21e621dd"`
Dec 05 07:56:37.407 INFO [stdout] cdd84db1886f08d4a9d4f0523359c68793f48a2316ffe58c4af1c4ea21e621dd
Dec 05 07:56:37.411 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-2/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +906deae0790bd18681b937fe9a141a3c26cf1855-alt test --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 05 07:56:38.082 INFO [stdout] 1d147f625a492c7580e12fcebc3a64abf01ef82e9b2db080be8668ae82607584
Dec 05 07:56:38.088 INFO running `"docker" "start" "-a" "1d147f625a492c7580e12fcebc3a64abf01ef82e9b2db080be8668ae82607584"`
Dec 05 07:56:39.997 INFO [stderr] usermod: no changes
Dec 05 07:56:40.088 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
Dec 05 07:56:40.096 INFO [stderr]      Running /target/debug/deps/merkle_tree-14932c6becfefb13
Dec 05 07:56:40.100 INFO [stdout] 
Dec 05 07:56:40.100 INFO [stdout] running 0 tests
Dec 05 07:56:40.100 INFO [stdout] 
Dec 05 07:56:40.100 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 05 07:56:40.100 INFO [stdout] 
Dec 05 07:56:40.100 INFO [stdout] 
Dec 05 07:56:40.100 INFO [stdout] running 0 tests
Dec 05 07:56:40.100 INFO [stdout] 
Dec 05 07:56:40.100 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 05 07:56:40.100 INFO [stdout] 
Dec 05 07:56:40.100 INFO [stderr]      Running /target/debug/deps/merkle_hash_tree-6f9c072e15c70ea1
Dec 05 07:56:40.101 INFO [stderr]      Running /target/debug/deps/test-3a0080f4d1d39456
Dec 05 07:56:40.104 INFO [stdout] 
Dec 05 07:56:40.104 INFO [stdout] running 16 tests
Dec 05 07:56:40.128 INFO [stdout] test crypto_test::sha256_with_min_size_input ... ok
Dec 05 07:56:40.275 INFO [stdout] test merkle_test::get_child ... ok
Dec 05 07:56:40.339 INFO [stdout] test merkle_test::create_with_empty ... ok
Dec 05 07:56:40.372 INFO [stdout] test merkle_test::create_with_one_wrong_length_data_block_2 ... ok
Dec 05 07:56:40.372 INFO [stdout] test merkle_test::create_with_one_wrong_length_data_block_1 ... ok
Dec 05 07:56:40.373 INFO [stdout] test merkle_test::get_child_with_wrong_index ... ok
Dec 05 07:56:40.373 INFO [stdout] test crypto_test::sha256_with_wrong_size_input ... ok
Dec 05 07:56:40.374 INFO [stdout] test merkle_test::get_child_with_wrong_level_less ... ok
Dec 05 07:56:40.374 INFO [stdout] test merkle_test::get_child_with_wrong_level_greater ... ok
Dec 05 07:56:40.444 INFO [stdout] test merkle_test::get_parent_with_wrong_level ... ok
Dec 05 07:56:40.444 INFO [stdout] test merkle_test::get_parent_with_wrong_index ... ok
Dec 05 07:56:40.447 INFO [stdout] test merkle_test::get_hash_with_wrong_level ... ok
Dec 05 07:56:40.452 INFO [stdout] test merkle_test::get_hash_with_wrong_index ... ok
Dec 05 07:56:40.475 INFO [stdout] test merkle_test::get_wrong_level ... ok
Dec 05 07:56:40.485 INFO [stdout] test merkle_test::get_parent ... ok
Dec 05 07:56:47.621 INFO [stdout] test merkle_test::equal_test_one_core_vs_few_cores ... ok
Dec 05 07:56:47.621 INFO [stdout] 
Dec 05 07:56:47.621 INFO [stdout] test result: ok. 16 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 05 07:56:47.621 INFO [stdout] 
Dec 05 07:56:47.628 INFO [stderr]    Doc-tests merkle_tree
Dec 05 07:56:48.286 INFO [stdout] 
Dec 05 07:56:48.286 INFO [stdout] running 1 test
Dec 05 07:56:48.286 INFO [stdout] test src/lib.rs -  (line 16) ... ignored
Dec 05 07:56:48.286 INFO [stdout] 
Dec 05 07:56:48.286 INFO [stdout] test result: ok. 0 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out
Dec 05 07:56:48.286 INFO [stdout] 
Dec 05 07:56:48.293 INFO [stderr] su: No module specific data is present
Dec 05 07:56:48.864 INFO running `"docker" "inspect" "1d147f625a492c7580e12fcebc3a64abf01ef82e9b2db080be8668ae82607584"`
Dec 05 07:56:49.204 INFO running `"docker" "rm" "-f" "1d147f625a492c7580e12fcebc3a64abf01ef82e9b2db080be8668ae82607584"`
Dec 05 07:56:49.538 INFO [stdout] 1d147f625a492c7580e12fcebc3a64abf01ef82e9b2db080be8668ae82607584