Dec 01 07:25:12.826 INFO documenting sergorl/merkle_hash_tree against try#f86f76f89ea2b1ccbfb3741962ec2029d878a389 for pr-55318-1
Dec 01 07:25:12.826 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55318-1/worker-6/try#f86f76f89ea2b1ccbfb3741962ec2029d878a389:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-55318-1/try#f86f76f89ea2b1ccbfb3741962ec2029d878a389:/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 +f86f76f89ea2b1ccbfb3741962ec2029d878a389-alt doc --frozen --no-deps --document-private-items" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 01 07:25:13.202 INFO [stdout] 5bc8612eae2f00da0a1627003874b3422e876a6cc0ef970e63c4f99bcc41e386
Dec 01 07:25:13.212 INFO running `"docker" "start" "-a" "5bc8612eae2f00da0a1627003874b3422e876a6cc0ef970e63c4f99bcc41e386"`
Dec 01 07:25:14.665 INFO [stderr] usermod: no changes
Dec 01 07:25:14.812 INFO [stderr]     Checking num_cpus v0.2.13
Dec 01 07:25:14.854 INFO [stderr]     Checking rust-crypto v0.2.36
Dec 01 07:25:20.640 INFO [stderr]     Checking merkle_hash_tree v0.1.0 (/source)
Dec 01 07:25:20.640 INFO [stderr]  Documenting merkle_hash_tree v0.1.0 (/source)
Dec 01 07:25:21.283 INFO [stderr] warning: unused variable: `num_thread`
Dec 01 07:25:21.283 INFO [stderr]    --> src/lib.rs:272:13
Dec 01 07:25:21.283 INFO [stderr]     |
Dec 01 07:25:21.283 INFO [stderr] 272 |         let num_thread: usize;
Dec 01 07:25:21.283 INFO [stderr]     |             ^^^^^^^^^^ help: consider using `_num_thread` instead
Dec 01 07:25:21.283 INFO [stderr]     |
Dec 01 07:25:21.283 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 01 07:25:21.283 INFO [stderr] 
Dec 01 07:25:21.283 INFO [stderr] warning: unused variable: `num_cpus`
Dec 01 07:25:21.283 INFO [stderr]    --> src/lib.rs:255:78
Dec 01 07:25:21.283 INFO [stderr]     |
Dec 01 07:25:21.283 INFO [stderr] 255 | fn create_hash_level(hash_tree: &mut Vec<Vec<u8>>, pool: &rayon::ThreadPool, num_cpus: usize) {
Dec 01 07:25:21.283 INFO [stderr]     |                                                                              ^^^^^^^^ help: consider using `_num_cpus` instead
Dec 01 07:25:21.283 INFO [stderr] 
Dec 01 07:25:21.283 INFO [stderr] warning: unused variable: `num_cpus`
Dec 01 07:25:21.283 INFO [stderr]    --> src/lib.rs:305:5
Dec 01 07:25:21.283 INFO [stderr]     |
Dec 01 07:25:21.283 INFO [stderr] 305 |     num_cpus: usize,
Dec 01 07:25:21.283 INFO [stderr]     |     ^^^^^^^^ help: consider using `_num_cpus` instead
Dec 01 07:25:21.283 INFO [stderr] 
Dec 01 07:25:21.332 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 07:25:21.332 INFO [stderr]    --> src/lib.rs:158:9
Dec 01 07:25:21.332 INFO [stderr]     |
Dec 01 07:25:21.332 INFO [stderr] 158 |         write!(f, "{}\n", "Tree: ");
Dec 01 07:25:21.332 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 07:25:21.332 INFO [stderr]     |
Dec 01 07:25:21.332 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 01 07:25:21.333 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 07:25:21.333 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 01 07:25:21.333 INFO [stderr] 
Dec 01 07:25:21.333 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 07:25:21.333 INFO [stderr]    --> src/lib.rs:161:13
Dec 01 07:25:21.333 INFO [stderr]     |
Dec 01 07:25:21.333 INFO [stderr] 161 |             write!(f, "Level {}: \n", level);
Dec 01 07:25:21.333 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 07:25:21.333 INFO [stderr]     |
Dec 01 07:25:21.333 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 07:25:21.333 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 01 07:25:21.333 INFO [stderr] 
Dec 01 07:25:21.333 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 07:25:21.333 INFO [stderr]    --> src/lib.rs:164:17
Dec 01 07:25:21.333 INFO [stderr]     |
Dec 01 07:25:21.334 INFO [stderr] 164 |                 write!(f, "hash {}: {}\n", index, to_hex_string(hash));
Dec 01 07:25:21.334 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 07:25:21.334 INFO [stderr]     |
Dec 01 07:25:21.334 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 07:25:21.334 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 01 07:25:21.334 INFO [stderr] 
Dec 01 07:25:21.340 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 07:25:21.340 INFO [stderr]    --> src/lib.rs:170:13
Dec 01 07:25:21.340 INFO [stderr]     |
Dec 01 07:25:21.340 INFO [stderr] 170 | /             write!(
Dec 01 07:25:21.340 INFO [stderr] 171 | |                 f,
Dec 01 07:25:21.341 INFO [stderr] 172 | |                 "{}\n",
Dec 01 07:25:21.341 INFO [stderr] 173 | |                 "--------------------------------------------------------------------"
Dec 01 07:25:21.341 INFO [stderr] 174 | |             );
Dec 01 07:25:21.341 INFO [stderr]     | |______________^
Dec 01 07:25:21.341 INFO [stderr]     |
Dec 01 07:25:21.341 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 07:25:21.341 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 01 07:25:21.341 INFO [stderr] 
Dec 01 07:25:23.636 INFO [stderr] warning: `[u8]` cannot be resolved, ignoring it...
Dec 01 07:25:23.636 INFO [stderr]   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/rust-crypto-0.2.36/src/mac.rs:36:5
Dec 01 07:25:23.636 INFO [stderr]    |
Dec 01 07:25:23.636 INFO [stderr] 36 | /     /**
Dec 01 07:25:23.636 INFO [stderr] 37 | |      * Obtain the result of a Mac computation as [u8]. This method should be used very carefully
Dec 01 07:25:23.636 INFO [stderr] 38 | |      * since incorrect use of the Mac code could result in permitting a timing attack which defeats
Dec 01 07:25:23.636 INFO [stderr] 39 | |      * the security provided by a Mac function.
Dec 01 07:25:23.636 INFO [stderr] 40 | |      */
Dec 01 07:25:23.636 INFO [stderr]    | |_______^
Dec 01 07:25:23.636 INFO [stderr]    |
Dec 01 07:25:23.636 INFO [stderr]    = note: #[warn(intra_doc_link_resolution_failure)] on by default
Dec 01 07:25:23.636 INFO [stderr]    = note: the link appears in this line:
Dec 01 07:25:23.636 INFO [stderr]            
Dec 01 07:25:23.636 INFO [stderr]             Obtain the result of a Mac computation as [u8]. This method should be used very carefully
Dec 01 07:25:23.636 INFO [stderr]                                                        ^^
Dec 01 07:25:23.636 INFO [stderr]    = help: to escape `[` and `]` characters, just add '\' before them like `\[` or `\]`
Dec 01 07:25:23.636 INFO [stderr] 
Dec 01 07:25:24.584 INFO [stderr] warning: `[u8]` cannot be resolved, ignoring it...
Dec 01 07:25:24.584 INFO [stderr]   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/rust-crypto-0.2.36/src/mac.rs:36:5
Dec 01 07:25:24.584 INFO [stderr]    |
Dec 01 07:25:24.584 INFO [stderr] 36 | /     /**
Dec 01 07:25:24.584 INFO [stderr] 37 | |      * Obtain the result of a Mac computation as [u8]. This method should be used very carefully
Dec 01 07:25:24.584 INFO [stderr] 38 | |      * since incorrect use of the Mac code could result in permitting a timing attack which defeats
Dec 01 07:25:24.584 INFO [stderr] 39 | |      * the security provided by a Mac function.
Dec 01 07:25:24.584 INFO [stderr] 40 | |      */
Dec 01 07:25:24.584 INFO [stderr]    | |_______^
Dec 01 07:25:24.584 INFO [stderr]    |
Dec 01 07:25:24.584 INFO [stderr]    = note: #[warn(intra_doc_link_resolution_failure)] on by default
Dec 01 07:25:24.584 INFO [stderr]    = note: the link appears in this line:
Dec 01 07:25:24.584 INFO [stderr]            
Dec 01 07:25:24.584 INFO [stderr]             Obtain the result of a Mac computation as [u8]. This method should be used very carefully
Dec 01 07:25:24.584 INFO [stderr]                                                        ^^
Dec 01 07:25:24.584 INFO [stderr]    = help: to escape `[` and `]` characters, just add '\' before them like `\[` or `\]`
Dec 01 07:25:24.584 INFO [stderr] 
Dec 01 07:25:24.688 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.00s
Dec 01 07:25:24.694 INFO [stderr] su: No module specific data is present
Dec 01 07:25:26.090 INFO running `"docker" "inspect" "5bc8612eae2f00da0a1627003874b3422e876a6cc0ef970e63c4f99bcc41e386"`
Dec 01 07:25:26.376 INFO running `"docker" "rm" "-f" "5bc8612eae2f00da0a1627003874b3422e876a6cc0ef970e63c4f99bcc41e386"`
Dec 01 07:25:26.816 INFO [stdout] 5bc8612eae2f00da0a1627003874b3422e876a6cc0ef970e63c4f99bcc41e386