Dec 19 09:03:08.447 INFO checking sergorl/merkle_hash_tree against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 09:03:08.447 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-3/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/sergorl/merkle_hash_tree:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 09:03:08.866 INFO [stdout] 45334b1060f593ea4f5c074575e5c16172c8624b4d3cf2f4f5dd7bccd904441d
Dec 19 09:03:08.870 INFO running `"docker" "start" "-a" "45334b1060f593ea4f5c074575e5c16172c8624b4d3cf2f4f5dd7bccd904441d"`
Dec 19 09:03:10.696 INFO [stderr]     Checking num_cpus v0.2.13
Dec 19 09:03:10.696 INFO [stderr]     Checking rust-crypto v0.2.36
Dec 19 09:03:15.636 INFO [stderr]     Checking merkle_hash_tree v0.1.0 (/opt/crater/workdir)
Dec 19 09:03:16.136 INFO [stderr] warning: unused variable: `num_thread`
Dec 19 09:03:16.136 INFO [stderr]    --> src/lib.rs:272:13
Dec 19 09:03:16.136 INFO [stderr]     |
Dec 19 09:03:16.136 INFO [stderr] 272 |         let num_thread: usize;
Dec 19 09:03:16.136 INFO [stderr]     |             ^^^^^^^^^^ help: consider using `_num_thread` instead
Dec 19 09:03:16.158 INFO [stderr]     |
Dec 19 09:03:16.158 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 19 09:03:16.158 INFO [stderr] 
Dec 19 09:03:16.158 INFO [stderr] warning: unused variable: `num_cpus`
Dec 19 09:03:16.158 INFO [stderr]    --> src/lib.rs:255:78
Dec 19 09:03:16.158 INFO [stderr]     |
Dec 19 09:03:16.158 INFO [stderr] 255 | fn create_hash_level(hash_tree: &mut Vec<Vec<u8>>, pool: &rayon::ThreadPool, num_cpus: usize) {
Dec 19 09:03:16.158 INFO [stderr]     |                                                                              ^^^^^^^^ help: consider using `_num_cpus` instead
Dec 19 09:03:16.158 INFO [stderr] 
Dec 19 09:03:16.158 INFO [stderr] warning: unused variable: `num_cpus`
Dec 19 09:03:16.158 INFO [stderr]    --> src/lib.rs:305:5
Dec 19 09:03:16.158 INFO [stderr]     |
Dec 19 09:03:16.158 INFO [stderr] 305 |     num_cpus: usize,
Dec 19 09:03:16.158 INFO [stderr]     |     ^^^^^^^^ help: consider using `_num_cpus` instead
Dec 19 09:03:16.158 INFO [stderr] 
Dec 19 09:03:16.248 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 09:03:16.248 INFO [stderr]    --> src/lib.rs:158:9
Dec 19 09:03:16.248 INFO [stderr]     |
Dec 19 09:03:16.248 INFO [stderr] 158 |         write!(f, "{}\n", "Tree: ");
Dec 19 09:03:16.248 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 09:03:16.248 INFO [stderr]     |
Dec 19 09:03:16.248 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 09:03:16.248 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 09:03:16.248 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 19 09:03:16.248 INFO [stderr] 
Dec 19 09:03:16.248 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 09:03:16.248 INFO [stderr]    --> src/lib.rs:161:13
Dec 19 09:03:16.248 INFO [stderr]     |
Dec 19 09:03:16.248 INFO [stderr] 161 |             write!(f, "Level {}: \n", level);
Dec 19 09:03:16.248 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 09:03:16.248 INFO [stderr]     |
Dec 19 09:03:16.248 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 09:03:16.248 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 19 09:03:16.248 INFO [stderr] 
Dec 19 09:03:16.248 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 09:03:16.248 INFO [stderr]    --> src/lib.rs:164:17
Dec 19 09:03:16.248 INFO [stderr]     |
Dec 19 09:03:16.248 INFO [stderr] 164 |                 write!(f, "hash {}: {}\n", index, to_hex_string(hash));
Dec 19 09:03:16.248 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 09:03:16.248 INFO [stderr] warning: unused variable: `num_thread`
Dec 19 09:03:16.248 INFO [stderr]    --> src/lib.rs:272:13
Dec 19 09:03:16.248 INFO [stderr]     |
Dec 19 09:03:16.248 INFO [stderr] 272 |         let num_thread: usize;
Dec 19 09:03:16.248 INFO [stderr]     |             ^^^^^^^^^^ help: consider using `_num_thread` instead
Dec 19 09:03:16.248 INFO [stderr]     |
Dec 19 09:03:16.248 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 19 09:03:16.249 INFO [stderr] 
Dec 19 09:03:16.249 INFO [stderr] warning: unused variable: `num_cpus`
Dec 19 09:03:16.249 INFO [stderr]    --> src/lib.rs:255:78
Dec 19 09:03:16.249 INFO [stderr]     |
Dec 19 09:03:16.249 INFO [stderr] 255 | fn create_hash_level(hash_tree: &mut Vec<Vec<u8>>, pool: &rayon::ThreadPool, num_cpus: usize) {
Dec 19 09:03:16.249 INFO [stderr]     |                                                                              ^^^^^^^^ help: consider using `_num_cpus` instead
Dec 19 09:03:16.249 INFO [stderr] 
Dec 19 09:03:16.249 INFO [stderr] warning: unused variable: `num_cpus`
Dec 19 09:03:16.249 INFO [stderr]    --> src/lib.rs:305:5
Dec 19 09:03:16.249 INFO [stderr]     |
Dec 19 09:03:16.249 INFO [stderr] 305 |     num_cpus: usize,
Dec 19 09:03:16.249 INFO [stderr]     |     ^^^^^^^^ help: consider using `_num_cpus` instead
Dec 19 09:03:16.249 INFO [stderr] 
Dec 19 09:03:16.249 INFO [stderr]     |
Dec 19 09:03:16.249 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 09:03:16.249 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 19 09:03:16.249 INFO [stderr] 
Dec 19 09:03:16.249 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 09:03:16.249 INFO [stderr]    --> src/lib.rs:170:13
Dec 19 09:03:16.249 INFO [stderr]     |
Dec 19 09:03:16.249 INFO [stderr] 170 | /             write!(
Dec 19 09:03:16.249 INFO [stderr] 171 | |                 f,
Dec 19 09:03:16.249 INFO [stderr] 172 | |                 "{}\n",
Dec 19 09:03:16.249 INFO [stderr] 173 | |                 "--------------------------------------------------------------------"
Dec 19 09:03:16.249 INFO [stderr] 174 | |             );
Dec 19 09:03:16.249 INFO [stderr]     | |______________^
Dec 19 09:03:16.249 INFO [stderr]     |
Dec 19 09:03:16.249 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 09:03:16.249 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 19 09:03:16.249 INFO [stderr] 
Dec 19 09:03:16.336 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 09:03:16.336 INFO [stderr]    --> src/lib.rs:158:9
Dec 19 09:03:16.336 INFO [stderr]     |
Dec 19 09:03:16.336 INFO [stderr] 158 |         write!(f, "{}\n", "Tree: ");
Dec 19 09:03:16.336 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 09:03:16.348 INFO [stderr]     |
Dec 19 09:03:16.348 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 09:03:16.348 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 09:03:16.348 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 19 09:03:16.348 INFO [stderr] 
Dec 19 09:03:16.348 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 09:03:16.348 INFO [stderr]    --> src/lib.rs:161:13
Dec 19 09:03:16.348 INFO [stderr]     |
Dec 19 09:03:16.348 INFO [stderr] 161 |             write!(f, "Level {}: \n", level);
Dec 19 09:03:16.348 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 09:03:16.356 INFO [stderr]     |
Dec 19 09:03:16.356 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 09:03:16.356 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 19 09:03:16.356 INFO [stderr] 
Dec 19 09:03:16.356 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 09:03:16.356 INFO [stderr]    --> src/lib.rs:164:17
Dec 19 09:03:16.356 INFO [stderr]     |
Dec 19 09:03:16.356 INFO [stderr] 164 |                 write!(f, "hash {}: {}\n", index, to_hex_string(hash));
Dec 19 09:03:16.356 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 09:03:16.356 INFO [stderr]     |
Dec 19 09:03:16.356 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 09:03:16.356 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 19 09:03:16.356 INFO [stderr] 
Dec 19 09:03:16.356 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 09:03:16.356 INFO [stderr]    --> src/lib.rs:170:13
Dec 19 09:03:16.356 INFO [stderr]     |
Dec 19 09:03:16.356 INFO [stderr] 170 | /             write!(
Dec 19 09:03:16.356 INFO [stderr] 171 | |                 f,
Dec 19 09:03:16.356 INFO [stderr] 172 | |                 "{}\n",
Dec 19 09:03:16.356 INFO [stderr] 173 | |                 "--------------------------------------------------------------------"
Dec 19 09:03:16.356 INFO [stderr] 174 | |             );
Dec 19 09:03:16.356 INFO [stderr]     | |______________^
Dec 19 09:03:16.356 INFO [stderr]     |
Dec 19 09:03:16.356 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 09:03:16.357 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 19 09:03:16.357 INFO [stderr] 
Dec 19 09:03:16.940 INFO [stderr] warning: unused import: `merkle_tree::to_hex_string`
Dec 19 09:03:16.940 INFO [stderr]  --> src/main.rs:6:5
Dec 19 09:03:16.940 INFO [stderr]   |
Dec 19 09:03:16.940 INFO [stderr] 6 | use merkle_tree::to_hex_string;
Dec 19 09:03:16.940 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 09:03:16.948 INFO [stderr]   |
Dec 19 09:03:16.948 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 09:03:16.948 INFO [stderr] 
Dec 19 09:03:16.972 INFO [stderr] warning: unused import: `merkle_tree::to_hex_string`
Dec 19 09:03:16.972 INFO [stderr]  --> src/main.rs:6:5
Dec 19 09:03:16.972 INFO [stderr]   |
Dec 19 09:03:16.972 INFO [stderr] 6 | use merkle_tree::to_hex_string;
Dec 19 09:03:16.972 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 09:03:16.979 INFO [stderr]   |
Dec 19 09:03:16.979 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 09:03:16.979 INFO [stderr] 
Dec 19 09:03:16.984 INFO [stderr] warning: unused import: `rand::Rng`
Dec 19 09:03:16.984 INFO [stderr]  --> benches/bench.rs:9:5
Dec 19 09:03:16.984 INFO [stderr]   |
Dec 19 09:03:16.984 INFO [stderr] 9 | use rand::Rng;
Dec 19 09:03:16.984 INFO [stderr]   |     ^^^^^^^^^
Dec 19 09:03:16.984 INFO [stderr]   |
Dec 19 09:03:16.984 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 09:03:16.984 INFO [stderr] 
Dec 19 09:03:17.028 INFO [stderr] warning: unused variable: `start`
Dec 19 09:03:17.028 INFO [stderr]   --> src/main.rs:23:9
Dec 19 09:03:17.028 INFO [stderr]    |
Dec 19 09:03:17.028 INFO [stderr] 23 |     let start = PreciseTime::now();
Dec 19 09:03:17.028 INFO [stderr]    |         ^^^^^ help: consider using `_start` instead
Dec 19 09:03:17.036 INFO [stderr] warning: unused import: `crypto::digest::Digest`
Dec 19 09:03:17.037 INFO [stderr]   --> tests/test.rs:10:5
Dec 19 09:03:17.037 INFO [stderr]    |
Dec 19 09:03:17.037 INFO [stderr] 10 | use crypto::digest::Digest;
Dec 19 09:03:17.037 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
Dec 19 09:03:17.040 INFO [stderr]    |
Dec 19 09:03:17.040 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 09:03:17.040 INFO [stderr] 
Dec 19 09:03:17.040 INFO [stderr] warning: unused variable: `end`
Dec 19 09:03:17.040 INFO [stderr]   --> src/main.rs:25:9
Dec 19 09:03:17.040 INFO [stderr]    |
Dec 19 09:03:17.040 INFO [stderr] 25 |     let end = PreciseTime::now();
Dec 19 09:03:17.040 INFO [stderr]    |         ^^^ help: consider using `_end` instead
Dec 19 09:03:17.040 INFO [stderr] 
Dec 19 09:03:17.040 INFO [stderr] warning: variable does not need to be mutable
Dec 19 09:03:17.040 INFO [stderr]   --> src/main.rs:18:9
Dec 19 09:03:17.040 INFO [stderr]    |
Dec 19 09:03:17.040 INFO [stderr] 18 |     let mut num_block: usize = 8 * 2;
Dec 19 09:03:17.040 INFO [stderr]    |         ----^^^^^^^^^
Dec 19 09:03:17.040 INFO [stderr]    |         |
Dec 19 09:03:17.040 INFO [stderr]    |         help: remove this `mut`
Dec 19 09:03:17.048 INFO [stderr] warning: unused variable: `start`
Dec 19 09:03:17.048 INFO [stderr]   --> src/main.rs:23:9
Dec 19 09:03:17.048 INFO [stderr]    |
Dec 19 09:03:17.048 INFO [stderr] 23 |     let start = PreciseTime::now();
Dec 19 09:03:17.048 INFO [stderr]    |         ^^^^^ help: consider using `_start` instead
Dec 19 09:03:17.060 INFO [stderr]    |
Dec 19 09:03:17.060 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 19 09:03:17.060 INFO [stderr] 
Dec 19 09:03:17.060 INFO [stderr] warning: unused import: `rand::Rng`
Dec 19 09:03:17.060 INFO [stderr]   --> tests/test.rs:12:5
Dec 19 09:03:17.060 INFO [stderr]    |
Dec 19 09:03:17.060 INFO [stderr] 12 | use rand::Rng;
Dec 19 09:03:17.060 INFO [stderr]    |     ^^^^^^^^^
Dec 19 09:03:17.060 INFO [stderr] 
Dec 19 09:03:17.063 INFO [stderr]    |
Dec 19 09:03:17.063 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 09:03:17.063 INFO [stderr] 
Dec 19 09:03:17.063 INFO [stderr] warning: variable does not need to be mutable
Dec 19 09:03:17.063 INFO [stderr]   --> src/main.rs:19:9
Dec 19 09:03:17.063 INFO [stderr]    |
Dec 19 09:03:17.063 INFO [stderr] 19 |     let mut size_block: usize = 32;
Dec 19 09:03:17.063 INFO [stderr]    |         ----^^^^^^^^^^
Dec 19 09:03:17.063 INFO [stderr]    |         |
Dec 19 09:03:17.063 INFO [stderr]    |         help: remove this `mut`
Dec 19 09:03:17.063 INFO [stderr] 
Dec 19 09:03:17.075 INFO [stderr]    |
Dec 19 09:03:17.075 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 09:03:17.075 INFO [stderr] 
Dec 19 09:03:17.075 INFO [stderr] warning: unused variable: `end`
Dec 19 09:03:17.075 INFO [stderr]   --> src/main.rs:25:9
Dec 19 09:03:17.075 INFO [stderr]    |
Dec 19 09:03:17.075 INFO [stderr] 25 |     let end = PreciseTime::now();
Dec 19 09:03:17.075 INFO [stderr]    |         ^^^ help: consider using `_end` instead
Dec 19 09:03:17.075 INFO [stderr] 
Dec 19 09:03:17.075 INFO [stderr] warning: variable does not need to be mutable
Dec 19 09:03:17.075 INFO [stderr]   --> src/main.rs:18:9
Dec 19 09:03:17.075 INFO [stderr]    |
Dec 19 09:03:17.075 INFO [stderr] 18 |     let mut num_block: usize = 8 * 2;
Dec 19 09:03:17.075 INFO [stderr]    |         ----^^^^^^^^^
Dec 19 09:03:17.075 INFO [stderr]    |         |
Dec 19 09:03:17.076 INFO [stderr]    |         help: remove this `mut`
Dec 19 09:03:17.086 INFO [stderr]    |
Dec 19 09:03:17.086 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 09:03:17.086 INFO [stderr] 
Dec 19 09:03:17.086 INFO [stderr] warning: variable does not need to be mutable
Dec 19 09:03:17.086 INFO [stderr]   --> src/main.rs:19:9
Dec 19 09:03:17.086 INFO [stderr]    |
Dec 19 09:03:17.086 INFO [stderr] 19 |     let mut size_block: usize = 32;
Dec 19 09:03:17.086 INFO [stderr]    |         ----^^^^^^^^^^
Dec 19 09:03:17.086 INFO [stderr]    |         |
Dec 19 09:03:17.086 INFO [stderr]    |         help: remove this `mut`
Dec 19 09:03:17.086 INFO [stderr] 
Dec 19 09:03:17.293 INFO [stderr] warning: unused variable: `tree`
Dec 19 09:03:17.293 INFO [stderr]   --> tests/test.rs:66:13
Dec 19 09:03:17.293 INFO [stderr]    |
Dec 19 09:03:17.293 INFO [stderr] 66 |         let tree = MerkleTree::new(&data, num_cpus::get());
Dec 19 09:03:17.293 INFO [stderr]    |             ^^^^ help: consider using `_tree` instead
Dec 19 09:03:17.293 INFO [stderr]    |
Dec 19 09:03:17.293 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 09:03:17.293 INFO [stderr] 
Dec 19 09:03:17.293 INFO [stderr] warning: unused variable: `tree`
Dec 19 09:03:17.293 INFO [stderr]   --> tests/test.rs:74:13
Dec 19 09:03:17.293 INFO [stderr]    |
Dec 19 09:03:17.293 INFO [stderr] 74 |         let tree = MerkleTree::new(&data, num_cpus::get());
Dec 19 09:03:17.293 INFO [stderr]    |             ^^^^ help: consider using `_tree` instead
Dec 19 09:03:17.293 INFO [stderr] 
Dec 19 09:03:17.293 INFO [stderr] warning: unused variable: `tree`
Dec 19 09:03:17.293 INFO [stderr]   --> tests/test.rs:82:13
Dec 19 09:03:17.293 INFO [stderr]    |
Dec 19 09:03:17.293 INFO [stderr] 82 |         let tree = MerkleTree::new(&data, num_cpus::get());
Dec 19 09:03:17.293 INFO [stderr]    |             ^^^^ help: consider using `_tree` instead
Dec 19 09:03:17.293 INFO [stderr] 
Dec 19 09:03:17.381 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.79s
Dec 19 09:03:18.266 INFO running `"docker" "inspect" "45334b1060f593ea4f5c074575e5c16172c8624b4d3cf2f4f5dd7bccd904441d"`
Dec 19 09:03:18.610 INFO running `"docker" "rm" "-f" "45334b1060f593ea4f5c074575e5c16172c8624b4d3cf2f4f5dd7bccd904441d"`
Dec 19 09:03:18.924 INFO [stdout] 45334b1060f593ea4f5c074575e5c16172c8624b4d3cf2f4f5dd7bccd904441d