[INFO] fetching crate balloon 0.0.4...
[INFO] extracting crate balloon 0.0.4 into work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/reg/balloon/0.0.4
[INFO] extracting crate balloon 0.0.4 into work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/reg/balloon/0.0.4
[INFO] validating manifest of balloon-0.0.4 on toolchain master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of balloon-0.0.4 on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing balloon-0.0.4
[INFO] finished frobbing balloon-0.0.4
[INFO] frobbed toml for balloon-0.0.4 written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/reg/balloon/0.0.4/Cargo.toml
[INFO] started frobbing balloon-0.0.4
[INFO] finished frobbing balloon-0.0.4
[INFO] frobbed toml for balloon-0.0.4 written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/reg/balloon/0.0.4/Cargo.toml
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mohan v0.0.1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] checking balloon-0.0.4 against try#8f81d0bf6baf07b92f1246696722485c4ca0b049 for pr-62008
[INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-1/try#8f81d0bf6baf07b92f1246696722485c4ca0b049:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/reg/balloon/0.0.4:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/ec2-user/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" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] bcc6b8ca4b4a3cf62b6120cdcf28f6be7268436dc02cf0537fa2c1c4c2c19ac1
[INFO] running `"docker" "start" "-a" "bcc6b8ca4b4a3cf62b6120cdcf28f6be7268436dc02cf0537fa2c1c4c2c19ac1"`
[INFO] [stderr]     Checking elapsed v0.1.2
[INFO] [stderr]     Checking uint v0.6.1
[INFO] [stderr]     Checking fixed-hash v0.3.2
[INFO] [stderr]     Checking parking_lot_core v0.4.0
[INFO] [stderr]     Checking parking_lot v0.7.1
[INFO] [stderr]     Checking mohan v0.0.1
[INFO] [stderr]     Checking balloon v0.0.4 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `get`
[INFO] [stderr]   --> src/buffer.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pub fn get(&self, index: usize) -> Option<&T> { self.back.get(index) }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_mut`
[INFO] [stderr]   --> src/buffer.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     pub fn get_mut(&mut self, index: usize) -> Option<&mut T> { self.back.get_mut(index) }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `clear`
[INFO] [stderr]   --> src/buffer.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     pub fn clear(&mut self) { self.back.clear() }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_empty`
[INFO] [stderr]   --> src/buffer.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     pub fn is_empty(&self) -> bool { self.back.is_empty() }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `len`
[INFO] [stderr]   --> src/buffer.rs:47:5
[INFO] [stderr]    |
[INFO] [stderr] 47 |     pub fn len(&self) -> usize { self.back.len() }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get`
[INFO] [stderr]   --> src/buffer.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pub fn get(&self, index: usize) -> Option<&T> { self.back.get(index) }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_mut`
[INFO] [stderr]   --> src/buffer.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     pub fn get_mut(&mut self, index: usize) -> Option<&mut T> { self.back.get_mut(index) }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `clear`
[INFO] [stderr]   --> src/buffer.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     pub fn clear(&mut self) { self.back.clear() }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_empty`
[INFO] [stderr]   --> src/buffer.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     pub fn is_empty(&self) -> bool { self.back.is_empty() }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `len`
[INFO] [stderr]   --> src/buffer.rs:47:5
[INFO] [stderr]    |
[INFO] [stderr] 47 |     pub fn len(&self) -> usize { self.back.len() }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.26s
[INFO] running `"docker" "inspect" "bcc6b8ca4b4a3cf62b6120cdcf28f6be7268436dc02cf0537fa2c1c4c2c19ac1"`
[INFO] running `"docker" "rm" "-f" "bcc6b8ca4b4a3cf62b6120cdcf28f6be7268436dc02cf0537fa2c1c4c2c19ac1"`
[INFO] [stdout] bcc6b8ca4b4a3cf62b6120cdcf28f6be7268436dc02cf0537fa2c1c4c2c19ac1