[INFO] updating cached repository annikoff/hmbc
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/annikoff/hmbc
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/annikoff/hmbc" "work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/annikoff/hmbc"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/annikoff/hmbc'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/annikoff/hmbc" "work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/annikoff/hmbc"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/annikoff/hmbc'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 72f75e1920bc90f0f3aa1f01c3b3bd3b34664090
[INFO] sha for GitHub repo annikoff/hmbc: 72f75e1920bc90f0f3aa1f01c3b3bd3b34664090
[INFO] validating manifest of annikoff/hmbc on toolchain master#452087b4bf18cece2d52d7cd8c9147195e5404bf
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of annikoff/hmbc on toolchain try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing annikoff/hmbc
[INFO] finished frobbing annikoff/hmbc
[INFO] frobbed toml for annikoff/hmbc written to work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/annikoff/hmbc/Cargo.toml
[INFO] started frobbing annikoff/hmbc
[INFO] finished frobbing annikoff/hmbc
[INFO] frobbed toml for annikoff/hmbc written to work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/annikoff/hmbc/Cargo.toml
[INFO] crate annikoff/hmbc already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] checking annikoff/hmbc against try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab for pr-63247
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63247/worker-6/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/annikoff/hmbc:/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" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 00fb3375c150e711554cff35e8185c94ec6360d3ffde42fcb87c34934d0c86f5
[INFO] running `"docker" "start" "-a" "00fb3375c150e711554cff35e8185c94ec6360d3ffde42fcb87c34934d0c86f5"`
[INFO] [stderr]     Checking bincode v1.0.1
[INFO] [stderr]     Checking hmbc v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `timestamp`
[INFO] [stderr]   --> src/block.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     pub fn timestamp(&self) -> i64 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `previous_hash`
[INFO] [stderr]   --> src/block.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     pub fn previous_hash(&self) -> &str {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `content`
[INFO] [stderr]   --> src/block.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 54 |     pub fn content(&self) -> &str {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `content`
[INFO] [stderr]   --> src/block_content.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     pub fn content(&self) -> &String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `block`
[INFO] [stderr]   --> src/blockchain.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn block(&self, index: usize) -> Option<&Block> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `len`
[INFO] [stderr]   --> src/blockchain.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 41 |     pub fn len(&self) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `timestamp`
[INFO] [stderr]   --> src/block.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     pub fn timestamp(&self) -> i64 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.34s
[INFO] running `"docker" "inspect" "00fb3375c150e711554cff35e8185c94ec6360d3ffde42fcb87c34934d0c86f5"`
[INFO] running `"docker" "rm" "-f" "00fb3375c150e711554cff35e8185c94ec6360d3ffde42fcb87c34934d0c86f5"`
[INFO] [stdout] 00fb3375c150e711554cff35e8185c94ec6360d3ffde42fcb87c34934d0c86f5