Dec 13 03:48:16.186 INFO testing sergorl/merkle_hash_tree against master#bd47d6825bf4090517549d33cfef10d3300b4a75 for pr-56550
Dec 13 03:48:16.186 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-7/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-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 13 03:48:16.671 INFO [stdout] b1faba0307e756411a28ce7756782cb438bce4675e7589ed3122a7f5e3b632b9
Dec 13 03:48:16.677 INFO running `"docker" "start" "-a" "b1faba0307e756411a28ce7756782cb438bce4675e7589ed3122a7f5e3b632b9"`
Dec 13 03:48:17.762 INFO [stderr] usermod: no changes
Dec 13 03:48:17.867 INFO [stderr]    Compiling num_cpus v0.2.13
Dec 13 03:48:17.878 INFO [stderr]    Compiling rayon-core v1.3.0
Dec 13 03:48:17.879 INFO [stderr]    Compiling rust-crypto v0.2.36
Dec 13 03:48:20.262 INFO [stderr]    Compiling rayon v0.9.0
Dec 13 03:48:29.363 INFO [stderr]    Compiling merkle_hash_tree v0.1.0 (/source)
Dec 13 03:48:29.799 INFO [stderr] warning: unused variable: `num_thread`
Dec 13 03:48:29.799 INFO [stderr]    --> src/lib.rs:272:13
Dec 13 03:48:29.799 INFO [stderr]     |
Dec 13 03:48:29.799 INFO [stderr] 272 |         let num_thread: usize;
Dec 13 03:48:29.799 INFO [stderr]     |             ^^^^^^^^^^ help: consider using `_num_thread` instead
Dec 13 03:48:29.799 INFO [stderr]     |
Dec 13 03:48:29.799 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 13 03:48:29.799 INFO [stderr] 
Dec 13 03:48:29.799 INFO [stderr] warning: unused variable: `num_cpus`
Dec 13 03:48:29.799 INFO [stderr]    --> src/lib.rs:255:78
Dec 13 03:48:29.799 INFO [stderr]     |
Dec 13 03:48:29.799 INFO [stderr] 255 | fn create_hash_level(hash_tree: &mut Vec<Vec<u8>>, pool: &rayon::ThreadPool, num_cpus: usize) {
Dec 13 03:48:29.799 INFO [stderr]     |                                                                              ^^^^^^^^ help: consider using `_num_cpus` instead
Dec 13 03:48:29.799 INFO [stderr] 
Dec 13 03:48:29.799 INFO [stderr] warning: unused variable: `num_cpus`
Dec 13 03:48:29.799 INFO [stderr]    --> src/lib.rs:305:5
Dec 13 03:48:29.799 INFO [stderr]     |
Dec 13 03:48:29.799 INFO [stderr] 305 |     num_cpus: usize,
Dec 13 03:48:29.799 INFO [stderr]     |     ^^^^^^^^ help: consider using `_num_cpus` instead
Dec 13 03:48:29.799 INFO [stderr] 
Dec 13 03:48:29.839 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 03:48:29.839 INFO [stderr]    --> src/lib.rs:158:9
Dec 13 03:48:29.839 INFO [stderr]     |
Dec 13 03:48:29.839 INFO [stderr] 158 |         write!(f, "{}\n", "Tree: ");
Dec 13 03:48:29.839 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 03:48:29.839 INFO [stderr]     |
Dec 13 03:48:29.839 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 13 03:48:29.839 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 03:48:29.839 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 13 03:48:29.839 INFO [stderr] 
Dec 13 03:48:29.839 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 03:48:29.839 INFO [stderr]    --> src/lib.rs:161:13
Dec 13 03:48:29.839 INFO [stderr]     |
Dec 13 03:48:29.839 INFO [stderr] 161 |             write!(f, "Level {}: \n", level);
Dec 13 03:48:29.839 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 03:48:29.839 INFO [stderr]     |
Dec 13 03:48:29.839 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 03:48:29.839 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 13 03:48:29.839 INFO [stderr] 
Dec 13 03:48:29.839 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 03:48:29.839 INFO [stderr]    --> src/lib.rs:164:17
Dec 13 03:48:29.839 INFO [stderr]     |
Dec 13 03:48:29.839 INFO [stderr] 164 |                 write!(f, "hash {}: {}\n", index, to_hex_string(hash));
Dec 13 03:48:29.839 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 03:48:29.839 INFO [stderr]     |
Dec 13 03:48:29.839 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 03:48:29.839 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 13 03:48:29.839 INFO [stderr] 
Dec 13 03:48:29.839 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 03:48:29.839 INFO [stderr]    --> src/lib.rs:170:13
Dec 13 03:48:29.839 INFO [stderr]     |
Dec 13 03:48:29.839 INFO [stderr] 170 | /             write!(
Dec 13 03:48:29.839 INFO [stderr] 171 | |                 f,
Dec 13 03:48:29.839 INFO [stderr] 172 | |                 "{}\n",
Dec 13 03:48:29.839 INFO [stderr] 173 | |                 "--------------------------------------------------------------------"
Dec 13 03:48:29.839 INFO [stderr] 174 | |             );
Dec 13 03:48:29.839 INFO [stderr]     | |______________^
Dec 13 03:48:29.839 INFO [stderr]     |
Dec 13 03:48:29.839 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 03:48:29.839 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 13 03:48:29.839 INFO [stderr] 
Dec 13 03:48:31.263 INFO [stderr] warning: unused import: `merkle_tree::to_hex_string`
Dec 13 03:48:31.263 INFO [stderr]  --> src/main.rs:6:5
Dec 13 03:48:31.263 INFO [stderr]   |
Dec 13 03:48:31.263 INFO [stderr] 6 | use merkle_tree::to_hex_string;
Dec 13 03:48:31.264 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 03:48:31.264 INFO [stderr]   |
Dec 13 03:48:31.264 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 13 03:48:31.264 INFO [stderr] 
Dec 13 03:48:31.274 INFO [stderr] warning: unused variable: `start`
Dec 13 03:48:31.274 INFO [stderr]   --> src/main.rs:23:9
Dec 13 03:48:31.275 INFO [stderr]    |
Dec 13 03:48:31.275 INFO [stderr] 23 |     let start = PreciseTime::now();
Dec 13 03:48:31.275 INFO [stderr]    |         ^^^^^ help: consider using `_start` instead
Dec 13 03:48:31.275 INFO [stderr]    |
Dec 13 03:48:31.276 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 13 03:48:31.276 INFO [stderr] 
Dec 13 03:48:31.276 INFO [stderr] warning: unused variable: `end`
Dec 13 03:48:31.277 INFO [stderr]   --> src/main.rs:25:9
Dec 13 03:48:31.277 INFO [stderr]    |
Dec 13 03:48:31.277 INFO [stderr] 25 |     let end = PreciseTime::now();
Dec 13 03:48:31.277 INFO [stderr]    |         ^^^ help: consider using `_end` instead
Dec 13 03:48:31.280 INFO [stderr] 
Dec 13 03:48:31.280 INFO [stderr] warning: variable does not need to be mutable
Dec 13 03:48:31.281 INFO [stderr]   --> src/main.rs:18:9
Dec 13 03:48:31.281 INFO [stderr]    |
Dec 13 03:48:31.281 INFO [stderr] 18 |     let mut num_block: usize = 8 * 2;
Dec 13 03:48:31.282 INFO [stderr]    |         ----^^^^^^^^^
Dec 13 03:48:31.282 INFO [stderr]    |         |
Dec 13 03:48:31.282 INFO [stderr]    |         help: remove this `mut`
Dec 13 03:48:31.283 INFO [stderr]    |
Dec 13 03:48:31.283 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 13 03:48:31.283 INFO [stderr] 
Dec 13 03:48:31.283 INFO [stderr] warning: variable does not need to be mutable
Dec 13 03:48:31.283 INFO [stderr]   --> src/main.rs:19:9
Dec 13 03:48:31.283 INFO [stderr]    |
Dec 13 03:48:31.283 INFO [stderr] 19 |     let mut size_block: usize = 32;
Dec 13 03:48:31.283 INFO [stderr]    |         ----^^^^^^^^^^
Dec 13 03:48:31.283 INFO [stderr]    |         |
Dec 13 03:48:31.283 INFO [stderr]    |         help: remove this `mut`
Dec 13 03:48:31.287 INFO [stderr] 
Dec 13 03:48:32.118 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.32s
Dec 13 03:48:32.131 INFO [stderr] su: No module specific data is present
Dec 13 03:48:32.840 INFO running `"docker" "inspect" "b1faba0307e756411a28ce7756782cb438bce4675e7589ed3122a7f5e3b632b9"`
Dec 13 03:48:33.248 INFO running `"docker" "rm" "-f" "b1faba0307e756411a28ce7756782cb438bce4675e7589ed3122a7f5e3b632b9"`
Dec 13 03:48:33.659 INFO [stdout] b1faba0307e756411a28ce7756782cb438bce4675e7589ed3122a7f5e3b632b9
Dec 13 03:48:33.665 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-7/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-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 13 03:48:34.098 INFO [stdout] 9c56b1bea0ceb914a359f1bb8752cc31f8e6b7738f15f91317bc9a3f316cbf4f
Dec 13 03:48:34.101 INFO running `"docker" "start" "-a" "9c56b1bea0ceb914a359f1bb8752cc31f8e6b7738f15f91317bc9a3f316cbf4f"`
Dec 13 03:48:35.335 INFO [stderr] usermod: no changes
Dec 13 03:48:35.449 INFO [stderr]    Compiling merkle_hash_tree v0.1.0 (/source)
Dec 13 03:48:36.375 INFO [stderr] warning: unused import: `merkle_tree::to_hex_string`
Dec 13 03:48:36.375 INFO [stderr]  --> src/main.rs:6:5
Dec 13 03:48:36.375 INFO [stderr]   |
Dec 13 03:48:36.375 INFO [stderr] 6 | use merkle_tree::to_hex_string;
Dec 13 03:48:36.375 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 03:48:36.375 INFO [stderr]   |
Dec 13 03:48:36.375 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 13 03:48:36.375 INFO [stderr] 
Dec 13 03:48:36.447 INFO [stderr] warning: unused variable: `start`
Dec 13 03:48:36.447 INFO [stderr]   --> src/main.rs:23:9
Dec 13 03:48:36.447 INFO [stderr]    |
Dec 13 03:48:36.447 INFO [stderr] 23 |     let start = PreciseTime::now();
Dec 13 03:48:36.447 INFO [stderr]    |         ^^^^^ help: consider using `_start` instead
Dec 13 03:48:36.447 INFO [stderr]    |
Dec 13 03:48:36.447 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 13 03:48:36.447 INFO [stderr] 
Dec 13 03:48:36.447 INFO [stderr] warning: unused variable: `end`
Dec 13 03:48:36.447 INFO [stderr]   --> src/main.rs:25:9
Dec 13 03:48:36.447 INFO [stderr]    |
Dec 13 03:48:36.447 INFO [stderr] 25 |     let end = PreciseTime::now();
Dec 13 03:48:36.447 INFO [stderr]    |         ^^^ help: consider using `_end` instead
Dec 13 03:48:36.447 INFO [stderr] 
Dec 13 03:48:36.455 INFO [stderr] warning: variable does not need to be mutable
Dec 13 03:48:36.455 INFO [stderr]   --> src/main.rs:18:9
Dec 13 03:48:36.455 INFO [stderr]    |
Dec 13 03:48:36.455 INFO [stderr] 18 |     let mut num_block: usize = 8 * 2;
Dec 13 03:48:36.455 INFO [stderr]    |         ----^^^^^^^^^
Dec 13 03:48:36.455 INFO [stderr]    |         |
Dec 13 03:48:36.455 INFO [stderr]    |         help: remove this `mut`
Dec 13 03:48:36.455 INFO [stderr]    |
Dec 13 03:48:36.455 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 13 03:48:36.455 INFO [stderr] 
Dec 13 03:48:36.455 INFO [stderr] warning: variable does not need to be mutable
Dec 13 03:48:36.455 INFO [stderr]   --> src/main.rs:19:9
Dec 13 03:48:36.455 INFO [stderr]    |
Dec 13 03:48:36.455 INFO [stderr] 19 |     let mut size_block: usize = 32;
Dec 13 03:48:36.455 INFO [stderr]    |         ----^^^^^^^^^^
Dec 13 03:48:36.455 INFO [stderr]    |         |
Dec 13 03:48:36.455 INFO [stderr]    |         help: remove this `mut`
Dec 13 03:48:36.455 INFO [stderr] 
Dec 13 03:48:36.495 INFO [stderr] warning: unused import: `crypto::digest::Digest`
Dec 13 03:48:36.495 INFO [stderr]   --> tests/test.rs:10:5
Dec 13 03:48:36.495 INFO [stderr]    |
Dec 13 03:48:36.495 INFO [stderr] 10 | use crypto::digest::Digest;
Dec 13 03:48:36.495 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
Dec 13 03:48:36.495 INFO [stderr]    |
Dec 13 03:48:36.495 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 13 03:48:36.495 INFO [stderr] 
Dec 13 03:48:36.495 INFO [stderr] warning: unused import: `rand::Rng`
Dec 13 03:48:36.495 INFO [stderr]   --> tests/test.rs:12:5
Dec 13 03:48:36.495 INFO [stderr]    |
Dec 13 03:48:36.495 INFO [stderr] 12 | use rand::Rng;
Dec 13 03:48:36.495 INFO [stderr]    |     ^^^^^^^^^
Dec 13 03:48:36.495 INFO [stderr] 
Dec 13 03:48:36.767 INFO [stderr] warning: unused variable: `num_thread`
Dec 13 03:48:36.767 INFO [stderr]    --> src/lib.rs:272:13
Dec 13 03:48:36.767 INFO [stderr]     |
Dec 13 03:48:36.767 INFO [stderr] 272 |         let num_thread: usize;
Dec 13 03:48:36.767 INFO [stderr]     |             ^^^^^^^^^^ help: consider using `_num_thread` instead
Dec 13 03:48:36.767 INFO [stderr]     |
Dec 13 03:48:36.767 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 13 03:48:36.767 INFO [stderr] 
Dec 13 03:48:36.767 INFO [stderr] warning: unused variable: `num_cpus`
Dec 13 03:48:36.767 INFO [stderr]    --> src/lib.rs:255:78
Dec 13 03:48:36.767 INFO [stderr]     |
Dec 13 03:48:36.767 INFO [stderr] 255 | fn create_hash_level(hash_tree: &mut Vec<Vec<u8>>, pool: &rayon::ThreadPool, num_cpus: usize) {
Dec 13 03:48:36.767 INFO [stderr]     |                                                                              ^^^^^^^^ help: consider using `_num_cpus` instead
Dec 13 03:48:36.767 INFO [stderr] 
Dec 13 03:48:36.767 INFO [stderr] warning: unused variable: `num_cpus`
Dec 13 03:48:36.767 INFO [stderr]    --> src/lib.rs:305:5
Dec 13 03:48:36.767 INFO [stderr]     |
Dec 13 03:48:36.767 INFO [stderr] 305 |     num_cpus: usize,
Dec 13 03:48:36.767 INFO [stderr]     |     ^^^^^^^^ help: consider using `_num_cpus` instead
Dec 13 03:48:36.767 INFO [stderr] 
Dec 13 03:48:36.811 INFO [stderr] warning: unused variable: `tree`
Dec 13 03:48:36.811 INFO [stderr]   --> tests/test.rs:66:13
Dec 13 03:48:36.811 INFO [stderr]    |
Dec 13 03:48:36.811 INFO [stderr] 66 |         let tree = MerkleTree::new(&data, num_cpus::get());
Dec 13 03:48:36.811 INFO [stderr]    |             ^^^^ help: consider using `_tree` instead
Dec 13 03:48:36.811 INFO [stderr]    |
Dec 13 03:48:36.811 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 13 03:48:36.811 INFO [stderr] 
Dec 13 03:48:36.811 INFO [stderr] warning: unused variable: `tree`
Dec 13 03:48:36.811 INFO [stderr]   --> tests/test.rs:74:13
Dec 13 03:48:36.811 INFO [stderr]    |
Dec 13 03:48:36.811 INFO [stderr] 74 |         let tree = MerkleTree::new(&data, num_cpus::get());
Dec 13 03:48:36.811 INFO [stderr]    |             ^^^^ help: consider using `_tree` instead
Dec 13 03:48:36.811 INFO [stderr] 
Dec 13 03:48:36.811 INFO [stderr] warning: unused variable: `tree`
Dec 13 03:48:36.811 INFO [stderr]   --> tests/test.rs:82:13
Dec 13 03:48:36.811 INFO [stderr]    |
Dec 13 03:48:36.811 INFO [stderr] 82 |         let tree = MerkleTree::new(&data, num_cpus::get());
Dec 13 03:48:36.811 INFO [stderr]    |             ^^^^ help: consider using `_tree` instead
Dec 13 03:48:36.811 INFO [stderr] 
Dec 13 03:48:36.848 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 03:48:36.848 INFO [stderr]    --> src/lib.rs:158:9
Dec 13 03:48:36.848 INFO [stderr]     |
Dec 13 03:48:36.848 INFO [stderr] 158 |         write!(f, "{}\n", "Tree: ");
Dec 13 03:48:36.848 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 03:48:36.848 INFO [stderr]     |
Dec 13 03:48:36.848 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 13 03:48:36.848 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 03:48:36.848 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 13 03:48:36.848 INFO [stderr] 
Dec 13 03:48:36.848 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 03:48:36.848 INFO [stderr]    --> src/lib.rs:161:13
Dec 13 03:48:36.848 INFO [stderr]     |
Dec 13 03:48:36.848 INFO [stderr] 161 |             write!(f, "Level {}: \n", level);
Dec 13 03:48:36.848 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 03:48:36.848 INFO [stderr]     |
Dec 13 03:48:36.848 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 03:48:36.848 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 13 03:48:36.848 INFO [stderr] 
Dec 13 03:48:36.848 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 03:48:36.848 INFO [stderr]    --> src/lib.rs:164:17
Dec 13 03:48:36.848 INFO [stderr]     |
Dec 13 03:48:36.848 INFO [stderr] 164 |                 write!(f, "hash {}: {}\n", index, to_hex_string(hash));
Dec 13 03:48:36.848 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 03:48:36.848 INFO [stderr]     |
Dec 13 03:48:36.848 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 03:48:36.848 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 13 03:48:36.848 INFO [stderr] 
Dec 13 03:48:36.848 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 03:48:36.848 INFO [stderr]    --> src/lib.rs:170:13
Dec 13 03:48:36.848 INFO [stderr]     |
Dec 13 03:48:36.848 INFO [stderr] 170 | /             write!(
Dec 13 03:48:36.848 INFO [stderr] 171 | |                 f,
Dec 13 03:48:36.848 INFO [stderr] 172 | |                 "{}\n",
Dec 13 03:48:36.848 INFO [stderr] 173 | |                 "--------------------------------------------------------------------"
Dec 13 03:48:36.848 INFO [stderr] 174 | |             );
Dec 13 03:48:36.848 INFO [stderr]     | |______________^
Dec 13 03:48:36.848 INFO [stderr]     |
Dec 13 03:48:36.848 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 03:48:36.848 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 13 03:48:36.848 INFO [stderr] 
Dec 13 03:48:38.119 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.75s
Dec 13 03:48:38.119 INFO [stderr] su: No module specific data is present
Dec 13 03:48:38.927 INFO running `"docker" "inspect" "9c56b1bea0ceb914a359f1bb8752cc31f8e6b7738f15f91317bc9a3f316cbf4f"`
Dec 13 03:48:39.375 INFO running `"docker" "rm" "-f" "9c56b1bea0ceb914a359f1bb8752cc31f8e6b7738f15f91317bc9a3f316cbf4f"`
Dec 13 03:48:39.655 INFO [stdout] 9c56b1bea0ceb914a359f1bb8752cc31f8e6b7738f15f91317bc9a3f316cbf4f
Dec 13 03:48:39.663 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-7/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-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 13 03:48:40.059 INFO [stdout] d6e3aebaddf702d428151787e482758baeee9b24ff28c3f910eea98f77961d60
Dec 13 03:48:40.060 INFO running `"docker" "start" "-a" "d6e3aebaddf702d428151787e482758baeee9b24ff28c3f910eea98f77961d60"`
Dec 13 03:48:41.459 INFO [stderr] usermod: no changes
Dec 13 03:48:41.599 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.10s
Dec 13 03:48:41.602 INFO [stderr]      Running /target/debug/deps/merkle_tree-8e6b79398a954243
Dec 13 03:48:41.603 INFO [stdout] 
Dec 13 03:48:41.603 INFO [stderr]      Running /target/debug/deps/merkle_hash_tree-0828cc7b3a696d5c
Dec 13 03:48:41.603 INFO [stdout] running 0 tests
Dec 13 03:48:41.603 INFO [stdout] 
Dec 13 03:48:41.603 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 13 03:48:41.603 INFO [stdout] 
Dec 13 03:48:41.606 INFO [stdout] 
Dec 13 03:48:41.606 INFO [stderr]      Running /target/debug/deps/test-4a9943f9d41e62f4
Dec 13 03:48:41.606 INFO [stdout] running 0 tests
Dec 13 03:48:41.606 INFO [stdout] 
Dec 13 03:48:41.606 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 13 03:48:41.606 INFO [stdout] 
Dec 13 03:48:41.627 INFO [stdout] 
Dec 13 03:48:41.627 INFO [stdout] running 16 tests
Dec 13 03:48:41.637 INFO [stdout] test crypto_test::sha256_with_min_size_input ... ok
Dec 13 03:48:41.871 INFO [stdout] test merkle_test::get_child ... ok
Dec 13 03:48:41.924 INFO [stdout] test merkle_test::create_with_empty ... ok
Dec 13 03:48:41.946 INFO [stdout] test merkle_test::create_with_one_wrong_length_data_block_1 ... ok
Dec 13 03:48:41.947 INFO [stdout] test merkle_test::create_with_one_wrong_length_data_block_2 ... ok
Dec 13 03:48:41.947 INFO [stdout] test merkle_test::get_child_with_wrong_index ... ok
Dec 13 03:48:41.947 INFO [stdout] test merkle_test::get_child_with_wrong_level_greater ... ok
Dec 13 03:48:41.947 INFO [stdout] test merkle_test::get_child_with_wrong_level_less ... ok
Dec 13 03:48:41.947 INFO [stdout] test merkle_test::get_hash_with_wrong_index ... ok
Dec 13 03:48:41.951 INFO [stdout] test crypto_test::sha256_with_wrong_size_input ... ok
Dec 13 03:48:42.043 INFO [stdout] test merkle_test::get_parent_with_wrong_level ... ok
Dec 13 03:48:42.150 INFO [stdout] test merkle_test::get_hash_with_wrong_level ... ok
Dec 13 03:48:42.164 INFO [stdout] test merkle_test::get_parent ... ok
Dec 13 03:48:42.192 INFO [stdout] test merkle_test::get_parent_with_wrong_index ... ok
Dec 13 03:48:42.207 INFO [stdout] test merkle_test::get_wrong_level ... ok
Dec 13 03:48:49.999 INFO [stdout] test merkle_test::equal_test_one_core_vs_few_cores ... ok
Dec 13 03:48:49.999 INFO [stderr]    Doc-tests merkle_tree
Dec 13 03:48:49.999 INFO [stdout] 
Dec 13 03:48:49.999 INFO [stdout] test result: ok. 16 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 13 03:48:49.999 INFO [stdout] 
Dec 13 03:48:50.740 INFO [stdout] 
Dec 13 03:48:50.740 INFO [stdout] running 1 test
Dec 13 03:48:50.740 INFO [stdout] test src/lib.rs -  (line 16) ... ignored
Dec 13 03:48:50.740 INFO [stdout] 
Dec 13 03:48:50.740 INFO [stdout] test result: ok. 0 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out
Dec 13 03:48:50.740 INFO [stdout] 
Dec 13 03:48:50.740 INFO [stderr] su: No module specific data is present
Dec 13 03:48:51.544 INFO running `"docker" "inspect" "d6e3aebaddf702d428151787e482758baeee9b24ff28c3f910eea98f77961d60"`
Dec 13 03:48:51.817 INFO running `"docker" "rm" "-f" "d6e3aebaddf702d428151787e482758baeee9b24ff28c3f910eea98f77961d60"`
Dec 13 03:48:52.095 INFO [stdout] d6e3aebaddf702d428151787e482758baeee9b24ff28c3f910eea98f77961d60