Nov 27 13:30:01.522 INFO documenting sergorl/merkle_hash_tree against master#6bfb46e4ac9a2704f06de1a2ff7a4612cd70c8cb for pr-55318
Nov 27 13:30:01.524 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55318/worker-0/master#6bfb46e4ac9a2704f06de1a2ff7a4612cd70c8cb:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-55318/master#6bfb46e4ac9a2704f06de1a2ff7a4612cd70c8cb:/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 +6bfb46e4ac9a2704f06de1a2ff7a4612cd70c8cb-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"`
Nov 27 13:30:02.015 INFO [stdout] b3af6306da4ec11d0aaeed989965482d104bd0c2714fc0807ab8701b6a7135fe
Nov 27 13:30:02.019 INFO running `"docker" "start" "-a" "b3af6306da4ec11d0aaeed989965482d104bd0c2714fc0807ab8701b6a7135fe"`
Nov 27 13:30:03.839 INFO [stderr] usermod: no changes
Nov 27 13:30:03.955 INFO [stderr]     Checking num_cpus v0.2.13
Nov 27 13:30:03.955 INFO [stderr]     Checking rayon v0.9.0
Nov 27 13:30:03.955 INFO [stderr]     Checking rust-crypto v0.2.36
Nov 27 13:30:11.399 INFO [stderr]     Checking merkle_hash_tree v0.1.0 (/source)
Nov 27 13:30:11.399 INFO [stderr]  Documenting merkle_hash_tree v0.1.0 (/source)
Nov 27 13:30:12.166 INFO [stderr] warning: unused variable: `num_thread`
Nov 27 13:30:12.167 INFO [stderr]    --> src/lib.rs:272:13
Nov 27 13:30:12.168 INFO [stderr]     |
Nov 27 13:30:12.169 INFO [stderr] 272 |         let num_thread: usize;
Nov 27 13:30:12.169 INFO [stderr]     |             ^^^^^^^^^^ help: consider using `_num_thread` instead
Nov 27 13:30:12.170 INFO [stderr]     |
Nov 27 13:30:12.170 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Nov 27 13:30:12.171 INFO [stderr] 
Nov 27 13:30:12.172 INFO [stderr] warning: unused variable: `num_cpus`
Nov 27 13:30:12.172 INFO [stderr]    --> src/lib.rs:255:78
Nov 27 13:30:12.173 INFO [stderr]     |
Nov 27 13:30:12.174 INFO [stderr] 255 | fn create_hash_level(hash_tree: &mut Vec<Vec<u8>>, pool: &rayon::ThreadPool, num_cpus: usize) {
Nov 27 13:30:12.174 INFO [stderr]     |                                                                              ^^^^^^^^ help: consider using `_num_cpus` instead
Nov 27 13:30:12.175 INFO [stderr] 
Nov 27 13:30:12.175 INFO [stderr] warning: unused variable: `num_cpus`
Nov 27 13:30:12.176 INFO [stderr]    --> src/lib.rs:305:5
Nov 27 13:30:12.177 INFO [stderr]     |
Nov 27 13:30:12.177 INFO [stderr] 305 |     num_cpus: usize,
Nov 27 13:30:12.177 INFO [stderr]     |     ^^^^^^^^ help: consider using `_num_cpus` instead
Nov 27 13:30:12.177 INFO [stderr] 
Nov 27 13:30:12.246 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 27 13:30:12.247 INFO [stderr]    --> src/lib.rs:158:9
Nov 27 13:30:12.248 INFO [stderr]     |
Nov 27 13:30:12.249 INFO [stderr] 158 |         write!(f, "{}\n", "Tree: ");
Nov 27 13:30:12.249 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 13:30:12.250 INFO [stderr]     |
Nov 27 13:30:12.251 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Nov 27 13:30:12.251 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 27 13:30:12.252 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)
Nov 27 13:30:12.253 INFO [stderr] 
Nov 27 13:30:12.253 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 27 13:30:12.254 INFO [stderr]    --> src/lib.rs:161:13
Nov 27 13:30:12.255 INFO [stderr]     |
Nov 27 13:30:12.255 INFO [stderr] 161 |             write!(f, "Level {}: \n", level);
Nov 27 13:30:12.256 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 13:30:12.256 INFO [stderr]     |
Nov 27 13:30:12.257 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 27 13:30:12.257 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)
Nov 27 13:30:12.257 INFO [stderr] 
Nov 27 13:30:12.257 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 27 13:30:12.257 INFO [stderr]    --> src/lib.rs:164:17
Nov 27 13:30:12.257 INFO [stderr]     |
Nov 27 13:30:12.257 INFO [stderr] 164 |                 write!(f, "hash {}: {}\n", index, to_hex_string(hash));
Nov 27 13:30:12.257 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 13:30:12.257 INFO [stderr]     |
Nov 27 13:30:12.257 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 27 13:30:12.257 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)
Nov 27 13:30:12.257 INFO [stderr] 
Nov 27 13:30:12.257 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 27 13:30:12.257 INFO [stderr]    --> src/lib.rs:170:13
Nov 27 13:30:12.263 INFO [stderr]     |
Nov 27 13:30:12.263 INFO [stderr] 170 | /             write!(
Nov 27 13:30:12.263 INFO [stderr] 171 | |                 f,
Nov 27 13:30:12.263 INFO [stderr] 172 | |                 "{}\n",
Nov 27 13:30:12.263 INFO [stderr] 173 | |                 "--------------------------------------------------------------------"
Nov 27 13:30:12.263 INFO [stderr] 174 | |             );
Nov 27 13:30:12.263 INFO [stderr]     | |______________^
Nov 27 13:30:12.263 INFO [stderr]     |
Nov 27 13:30:12.263 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 27 13:30:12.263 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)
Nov 27 13:30:12.263 INFO [stderr] 
Nov 27 13:30:15.203 INFO [stderr] warning: `[u8]` cannot be resolved, ignoring it...
Nov 27 13:30:15.204 INFO [stderr]   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/rust-crypto-0.2.36/src/mac.rs:36:5
Nov 27 13:30:15.205 INFO [stderr]    |
Nov 27 13:30:15.205 INFO [stderr] 36 | /     /**
Nov 27 13:30:15.206 INFO [stderr] 37 | |      * Obtain the result of a Mac computation as [u8]. This method should be used very carefully
Nov 27 13:30:15.206 INFO [stderr] 38 | |      * since incorrect use of the Mac code could result in permitting a timing attack which defeats
Nov 27 13:30:15.207 INFO [stderr] 39 | |      * the security provided by a Mac function.
Nov 27 13:30:15.208 INFO [stderr] 40 | |      */
Nov 27 13:30:15.208 INFO [stderr]    | |_______^
Nov 27 13:30:15.209 INFO [stderr]    |
Nov 27 13:30:15.209 INFO [stderr]    = note: #[warn(intra_doc_link_resolution_failure)] on by default
Nov 27 13:30:15.210 INFO [stderr]    = note: the link appears in this line:
Nov 27 13:30:15.211 INFO [stderr]            
Nov 27 13:30:15.211 INFO [stderr]             Obtain the result of a Mac computation as [u8]. This method should be used very carefully
Nov 27 13:30:15.212 INFO [stderr]                                                        ^^
Nov 27 13:30:15.212 INFO [stderr]    = help: to escape `[` and `]` characters, just add '\' before them like `\[` or `\]`
Nov 27 13:30:15.213 INFO [stderr] 
Nov 27 13:30:15.775 INFO [stderr] warning: `[u8]` cannot be resolved, ignoring it...
Nov 27 13:30:15.775 INFO [stderr]   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/rust-crypto-0.2.36/src/mac.rs:36:5
Nov 27 13:30:15.775 INFO [stderr]    |
Nov 27 13:30:15.775 INFO [stderr] 36 | /     /**
Nov 27 13:30:15.775 INFO [stderr] 37 | |      * Obtain the result of a Mac computation as [u8]. This method should be used very carefully
Nov 27 13:30:15.775 INFO [stderr] 38 | |      * since incorrect use of the Mac code could result in permitting a timing attack which defeats
Nov 27 13:30:15.775 INFO [stderr] 39 | |      * the security provided by a Mac function.
Nov 27 13:30:15.775 INFO [stderr] 40 | |      */
Nov 27 13:30:15.775 INFO [stderr]    | |_______^
Nov 27 13:30:15.775 INFO [stderr]    |
Nov 27 13:30:15.775 INFO [stderr]    = note: #[warn(intra_doc_link_resolution_failure)] on by default
Nov 27 13:30:15.775 INFO [stderr]    = note: the link appears in this line:
Nov 27 13:30:15.775 INFO [stderr]            
Nov 27 13:30:15.775 INFO [stderr]             Obtain the result of a Mac computation as [u8]. This method should be used very carefully
Nov 27 13:30:15.775 INFO [stderr]                                                        ^^
Nov 27 13:30:15.775 INFO [stderr]    = help: to escape `[` and `]` characters, just add '\' before them like `\[` or `\]`
Nov 27 13:30:15.775 INFO [stderr] 
Nov 27 13:30:15.897 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.03s
Nov 27 13:30:15.902 INFO [stderr] su: No module specific data is present
Nov 27 13:30:17.763 INFO running `"docker" "inspect" "b3af6306da4ec11d0aaeed989965482d104bd0c2714fc0807ab8701b6a7135fe"`
Nov 27 13:30:18.011 INFO running `"docker" "rm" "-f" "b3af6306da4ec11d0aaeed989965482d104bd0c2714fc0807ab8701b6a7135fe"`
Nov 27 13:30:18.299 INFO [stdout] b3af6306da4ec11d0aaeed989965482d104bd0c2714fc0807ab8701b6a7135fe