[INFO] updating cached repository Parfyonator/merkle_tree
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Parfyonator/merkle_tree
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Parfyonator/merkle_tree" "work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/Parfyonator/merkle_tree"`
[INFO] [stderr] Cloning into 'work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/Parfyonator/merkle_tree'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Parfyonator/merkle_tree" "work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/Parfyonator/merkle_tree"`
[INFO] [stderr] Cloning into 'work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/Parfyonator/merkle_tree'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f6b7198d3fd038d998f0dc6a081148368f09ed39
[INFO] sha for GitHub repo Parfyonator/merkle_tree: f6b7198d3fd038d998f0dc6a081148368f09ed39
[INFO] validating manifest of Parfyonator/merkle_tree on toolchain master#39401465da4ce27aeeb2c2a26133ac35c63aa515
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Parfyonator/merkle_tree on toolchain try#f45cc3094ee337acd688771b9234318046b0572d
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Parfyonator/merkle_tree
[INFO] finished frobbing Parfyonator/merkle_tree
[INFO] frobbed toml for Parfyonator/merkle_tree written to work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/Parfyonator/merkle_tree/Cargo.toml
[INFO] started frobbing Parfyonator/merkle_tree
[INFO] finished frobbing Parfyonator/merkle_tree
[INFO] frobbed toml for Parfyonator/merkle_tree written to work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/Parfyonator/merkle_tree/Cargo.toml
[INFO] crate Parfyonator/merkle_tree already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking Parfyonator/merkle_tree against master#39401465da4ce27aeeb2c2a26133ac35c63aa515 for pr-60914
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60914/worker-1/master#39401465da4ce27aeeb2c2a26133ac35c63aa515:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/Parfyonator/merkle_tree:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] c566b52f5b724703c7ff3619640b39b6866442d2b96045cb2cde3665298fb6fc
[INFO] running `"docker" "start" "-a" "c566b52f5b724703c7ff3619640b39b6866442d2b96045cb2cde3665298fb6fc"`
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]     Checking hyper v0.10.5
[INFO] [stderr]     Checking merkle_tree v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `add_child`
[INFO] [stderr]   --> src/merkle_tree.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     fn add_child(&mut self, new_val: String) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `has_children`
[INFO] [stderr]   --> src/merkle_tree.rs:74:5
[INFO] [stderr]    |
[INFO] [stderr] 74 |     fn has_children(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add_child`
[INFO] [stderr]   --> src/merkle_tree.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     fn add_child(&mut self, new_val: String) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `has_children`
[INFO] [stderr]   --> src/merkle_tree.rs:74:5
[INFO] [stderr]    |
[INFO] [stderr] 74 |     fn has_children(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.54s
[INFO] running `"docker" "inspect" "c566b52f5b724703c7ff3619640b39b6866442d2b96045cb2cde3665298fb6fc"`
[INFO] running `"docker" "rm" "-f" "c566b52f5b724703c7ff3619640b39b6866442d2b96045cb2cde3665298fb6fc"`
[INFO] [stdout] c566b52f5b724703c7ff3619640b39b6866442d2b96045cb2cde3665298fb6fc